ELECTRONIC DEVICE

专利摘要:
It is an electronic device that includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from the outside in, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outer surface being convex in a paraxial region thereof. The second lens element has an inner surface being convex in a paraxial region thereof. the fourth lens element has an inner surface being concave in a paraxial region thereof, wherein at least one of an outer surface and the inner surface of the fourth lens element includes at least one critical point in a region outside the optical axis of the lens. same.
公开号:BR102018070153A2
申请号:R102018070153-3
申请日:2018-09-28
公开日:2019-04-16
发明作者:Hung-Shuo CHEN；Chien-Hsun Wu；Tzu-Chieh Kuo
申请人:Largan Precision Co., Ltd.；
IPC主号:

专利说明:

[01] The present disclosure refers to an electronic device. More particularly, the present disclosure relates to an electronic device with at least one optical lens assembly.
Description of the Related Technique [02] With the rapid advances in technologies, the application of photography modules has become increasingly widespread, and the technologies for applying three-dimensional space observation are also increasingly mature. Conventional three-dimensional space identification technologies are mostly limited to two-dimensional images, and are capable of performing three-dimensional spatial analysis functions with algorithms; however, when the information from the three-dimensional information space is simplified in the two-dimensional space image, it will always result in information gaps, and limit the results retrieved from the calculation.
[03] Therefore, a three-dimensional image capture technology has been developed that projects light with certain characteristics (such as specific wavelengths and patterns, etc.) onto an object, the light is reflected by the object, and then received by a set of lens, being calculated in order to obtain the distance between each position of the object and the set of lens, and to determine information from the three-dimensional image. The technology is widely applied to electronic devices, such as somatosensory games, virtual reality, reality
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2/94 enhanced, dynamic, assisted, three-dimensional image capture, capture multi-lens electronic steering systems, facial recognition, various types of smart, wearable device devices, surveillance equipment, digital cameras, identification systems, entertainment devices , sports devices and auxiliary smart home systems today.
[04] Nowadays, three-dimensional image capture technologies adopt, in the vast majority, a range of infrared wavelengths in a specific one to reduce interference in order to obtain more accurate measurements. However, as applications, such as facial recognition and augmented reality, being used in portable devices, such as smart phones, have gradually developed, their sensing module needs to be more precise and compact, but conventional technologies still face difficulties in achieving a balance between these two characteristics.
SUMMARY [05] In accordance with one aspect of the present disclosure, an electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from outside to inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an external surface being convex in a paraxial region of the same. The second lens element has an internal surface being
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3/94 convex in a paraxial region of the same. The fourth lens element has an inner surface being concave in a paraxial region thereof, where at least one of an outer surface and the inner surface of the fourth lens element includes at least one critical point in a region outside the optical axis of the lens. same. When a measurement is made according to a reference wavelength as a d line, an Abbe number for the first lens element is Vd1, an Abbe number for the second lens element is Vd2, an Abbe number for the third lens element is Vd3, an Abbe number of the fourth lens element is Vd4, a focal length of the optical lens assembly is fd, a focal length of the third lens element is fd3, and a focal length of the fourth lens element is fd4, the following conditions are satisfied:
0.650.650.6510.00.69[06] <Vd1 / Vd2 <<Vd1 / Vd3 <<Vd1 / Vd4 <<Vd1 <38.0<| fd / fd3 | + |According 1.54;1.54;1.54;; andfd / fd4 |.with an aspect of this revelation, one device electronic includes at least one set optical lens. The set of optical lens includes four elements of lens, and the four elements of lens are , in the order of outside in, a first
lens element, a second lens element, a third lens element and a fourth lens element. The second lens element has an external surface being concave in a paraxial region of the same and an internal surface being convex in a paraxial region of the
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4/94 same. The third lens element has an external surface being concave in a paraxial region of the same. The fourth lens element has an outer surface being convex in a paraxial region of the same and an inner surface being concave in a paraxial region of the same, where the outer surface of the fourth lens element includes at least one critical point in an outside region optical axis. At least one of the third lens element and the fourth lens element has positive refractive power, and the other has negative refractive power. When a measurement is made according to a reference wavelength as a d line, an Abbe number for the first lens element is Vd1, an Abbe number for the second lens element is Vd2, an Abbe number for the third lens element is Vd3, an Abbe number of the fourth lens element is Vd4, a focal length of the optical lens assembly is fd, a focal length of the third lens element is fd3, and a focal length of the fourth lens element is fd4, the following conditions are satisfied:
0.65 <Vd1 / Vd2 < 1.54; 0.65 <Vd1 / Vd3 < 1.54; 0.65 <Vd1 / Vd4 < 1.54; and 0.69 <| fd / fd3 | + | fd / fd4 | <2.65. [07] According with an aspect of this revelation, a device electronic includes a module in sensing, that includes projection equipment and one
receiving equipment. The projection equipment includes an optical lens assembly and at least one light source, with the optical lens assembly comprising four to six
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5/94 lens elements, and the light source is arranged on an inner connecting surface of the optical lens assembly. The receiving equipment includes an optical lens assembly and an image sensor, where the optical lens assembly includes four to six lens elements, and the image sensor is arranged on an internal mating surface of the optical lens assembly . The light source of the projection equipment is projected onto a sensed object and is received by the receiving equipment after reflection, and is represented as an image on the image sensor. When a measurement is made according to a reference wavelength as a d line, at least six lens elements of the lens elements of the optical lens assembly of the projection equipment and the lens elements of the optical lens assembly of the equipment receivers have Abbe numbers less than 38. In the optical lens assembly of each of the projection equipment and the receiving equipment, an axial distance between an outer surface of one of the lens elements closest to the outside and an inner surface of one of the lens elements closest to the interior is TD, and the following condition is met:
mm <TD <5 mm.
BRIEF DESCRIPTION OF THE DRAWINGS [08] The present disclosure can be understood more fully by reading the following detailed description of the modality, taking as a reference the accompanying drawings as follows:
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[09] Fig. 1 and a view schematic of one electronic device according to the first modality of the present revelation; [010] Fig. 2 shows aberration curves spherical, curves of field astigmatic and a curve in device distortion electronic according The first modality; [011] Fig. 3 is a view schematic of one electronic device according to the second modality of the present revelation; [012] Fig. 4 shows aberration curves spherical, curves of field astigmatic and a curve in distortion of the electronic device according to the second modality; [013] Fig. 5 is a view schematic of one electronic device according to the third modality of the present revelation; [014] Fig. 6 shows aberration curves spherical, curves of field astigmatic and a curve in device distortion electronic according The third modality; [015] Fig. 7 is a view schematic of one electronic device according to the fourth modality gives present revelation; [016] Fig. 8 shows aberration curves spherical, curves of field astigmatic and a curve in
distortion of the electronic device according to the fourth modality;
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7/94 [017] Fig. 9 is a schematic view of an electronic device according to the fifth embodiment of the present disclosure;
[018] Fig. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the fifth modality;
[019] Fig. 11 is a schematic view of an electronic device according to the sixth embodiment of the present disclosure;
[020] Fig. 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the sixth modality;
[021] Fig. 13 is a schematic view of an electronic device according to the seventh embodiment of the present disclosure;
[022] Fig. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the seventh modality;
[023] Fig. 15 is a schematic view of an electronic device according to the eighth embodiment of the present disclosure;
[024] FIg. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the eighth modality;
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8/94 [025] Fig. 17 is a schematic view of an electronic device according to the ninth embodiment of the present disclosure;
[026] Fig. 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the ninth modality;
[027] Fig. 19 is a schematic view of an electronic device according to the tenth embodiment of the present disclosure;
[028] Fig. 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the tenth modality;
[029] Fig. 21 is a schematic view of an electronic device according to the eleventh embodiment of the present disclosure;
[030] Fig. 22 shows curves in aberration spherical, curves field astigmatic and an curve of distortion of the electronic device according to with the tenth first modality; [031] Fig. 23 is a schematic view of a electronic device according to twelfth modality of this revelation; [032] Fig. 24 shows curves in aberration spherical, curves field astigmatic and an curve of
distortion of the electronic device according to the twelfth modality;
[033] Fig. 25 is a schematic view of the critical points according to the first modality of Fig. 1;
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9/94 [034] Fig. 2A is a schematic view of a sensing module for an electronic device according to the thirteenth embodiment of the present disclosure;
[035] Fig. 26B is a schematic view of an appearance on one side of the electronic device according to the thirteenth embodiment of the present disclosure;
[036] Fig. 26C is a schematic view of an appearance on the other side of the electronic device according to the thirteenth embodiment of the present disclosure;
[037] Fig. 27A is a schematic view of a device using the fourteenth modality of the appearance of the electronic state according to the present disclosure;
[038] Fig
27B is a schematic view of an electronic device sensing module in accordance with the fourteenth embodiment of the present disclosure; and [039] Fig. 28 is a schematic view of an electronic device according to the fifteenth embodiment of the present disclosure.
DETAILED DESCRIPTION [040] An electronic device includes at least one optical lens assembly, which can be applied to an infrared range, especially for the application of infrared projection and reception. Thus, it is favorable for adapting to three-dimensional image capture technologies for obtaining high precision of projection capacity and high image quality, in addition to maintaining compactness.
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10/94 [041] The optical lens assembly can include four to six lens elements, so that it is favorable to obtain greater precision of projection capacity and higher image quality, in addition to maintaining the compactness of the optical lens assembly . Preferably, the optical lens assembly may include four lens elements, which are, in order from the outside in, a first lens element, a second lens element, a third lens element and a fourth lens element.
[042] The first lens element may have an outer surface being convex in a paraxial region of the same, so that it is favorable to reduce the angle of incidence of light from the wide field of view in order to be applicable to the design of the field wide viewing angle on the optical lens assembly. The first lens element can have positive refractive power, so that the demand for compact size can be achieved by reducing the total travel length of the optical lens assembly. The first lens element may have an internal surface being concave in a paraxial region of the same, so that the generation of astigmatism can be reduced.
[043] The second lens element may have an outer surface being concave in a paraxial region of the same, so that it is favorable to increase the field of view by having sufficient space between the first lens element and the second lens element. The second lens element may have an internal surface being convex in a region parallel to it, so that it is favorable to correct aberrations outside the optical axis by adjusting the path of the output light. The second element
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11/94 lens can have positive refractive power, so that it is favorable to reduce spherical aberrations by balancing the distribution of the positive refractive power of the optical lens assembly.
[044] The third lens element may have an outer surface being concave in a paraxial region of the same, so that aberrations outside the optical axis can be reduced. The third lens element can have positive refractive power, so that the positive refractive power of the optical lens assembly can be diverged, which can be favorable to avoid excessive spherical aberrations generated by the optical lens assembly during the reduction of the path length total, and also favorable to the reduction of sensitivity. The third lens element may have an internal surface being convex in a region parallel to it, so that it is favorable to attenuate spurious light by reducing the surface reflection of the light.
[045] The fourth lens element may have an outer surface being convex in a paraxial region of the same, so that it is favorable to improve the image quality in a peripheral region by correcting the field curvature in the off-axis region optical. The fourth lens element may have an inner surface being concave in a paraxial region thereof, so that the rear focal length and the total travel length can be reduced. In addition, at least one of the outer surface and the inner surface of the fourth lens element may include at least one critical point in a region outside its optical axis, so that it is favorable for
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12/94 to correct aberrations outside the optical axis, and also favorable to reduce surface reflection by adjusting the angle of incidence and the angle of light output in a peripheral region. The outer surface of the fourth lens element can include at least one critical point in the region outside its optical axis, which can additionally correct for aberrations outside the optical axis. The inner surface of the fourth lens element may include at least one critical point in the region outside its optical axis, in order to further reduce the surface reflection of light in a peripheral region [046] Additionally, one of the third element of lens and the fourth lens element can have positive refractive power, and the other one can have negative refractive power. Therefore, they are favorable to reducing the generation of aberrations by the complementary effect of the third lens element and the fourth lens element.
[047] One of the outer surface and the inner surface of each of the first lens element, the second lens element, the third lens element and the fourth lens element can be concave in a region of the same, and the another can be convex in a region of the same. Therefore, it is favorable to obtain compactness and to increase the effective optical region of an internal conjugation surface.
[048] When a measurement is made according to a wavelength as a line d, an Abbe number of the first lens element is Vd1, an Abbe number of the second lens element is Vd2, an Abbe number of the third lens element is Vd3, and an Abbe number of the fourth
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13/94 lens element is Vd4, the following conditions are met: 0.65 <Vd1 / Vd2 <1.54; 0.65 <Vd1 / Vd3 <1.54; and 0.65 <Vd1 / Vd4 <1.54. Therefore, this is favorable to correct aberrations by correlating the materials of the lens elements. In particular, the correction of chromatic aberrations is not as important when the optical lens assembly is applied to the infrared range, so that their complexity can be reduced, and is favorable to the correction of other types of aberrations and to the reduction of size to obtain a compact optical lens assembly with high image quality. Preferably, the following conditions can be met: 0.7 0 <Vd1 / Vd2 <1.44; 0.70 <Vd1 / Vd3 <1.44; and 0.70 <Vd1 / Vd4 <1.44. More preferably, the following conditions can be met: 0.75 <Vd1 / Vd2 <1.35; 0.75 <Vd1 / Vd3 <1.35; and 0.75 <Vd1 / Vd4 <1.35. In detail, the Abbe numbers are calculated by Vd = (Nd1) / (NF-NC), where Nd is the index of refraction measured with a wavelength like the helium line (587.6 nm), NF is the index of refraction measured with a wavelength like the hydrogen line (486.1 nm), and NC is the index of refraction measured with a wavelength like the hydrogen line (656.3 nm).
[049] When the measurement is made according to wavelength reference like the line d, the number Abbe's first lens element is Vd1, the following condition is satisfied : 10, 0 <Vd1 < 38.0. Therefore,
chromatic aberrations of the optical lens assembly can be reduced, and it is favorable to correct aberrations and obtain compactness by using the material with the Abbe number
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14/94 low which has the best light refraction capacity. Preferably, the following condition can be met: 12.0 <Vd1 <34.0. More preferably, the following condition can be met: 14.0 <Vd1 <30.0.
[050] When the measurement is made according to the reference wavelength as line d, a focal length of the optical lens assembly fd, a focal length of the third lens element is fd3, and a focal length of the fourth element lens is fd4, the following condition is met: 0.69 <| fd / fd3 | + | fd / fd4 |. Therefore, it is favorable to correct aberrations outside the optical axis and to reduce the total travel length of the optical lens assembly by correlating the refractive power of the third lens element and the fourth lens element. Preferably, the following condition can be met: 0.69 <| fd / fd3 | + | fd / fd4 | <5.0. Thus, it is favorable to avoid excessive spherical aberrations and to reduce the size by avoiding the excessive refractive power of the lens elements. More preferably, the following condition can be met: 0.69 <| fd / fd3 | + | fd / fd4 | <2.65.
[051] When the measurement is made according to the reference wavelength as line d, a refractive index of the first lens element is Nd1, the following condition is met: 1.650 <Nd1 <1.750. Therefore, it is favorable, to correct the aberrations, to arrange the material with a high refractive index in order to reduce the size of the optical lens assembly, especially for the infrared, which is difficult to refract.
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15/94 [052] When the measurement is made according to the reference wavelength as line d, a sum of the Abbe numbers of the first lens element, the second lens element, the third lens element and the fourth lens element is EVd, the following condition is met: 40.0 <Ódd <155.0. Therefore, it is favorable, to reduce the size and correct aberrations, to adjust the arrangement of the materials of the lens elements, especially the application of the infrared band, which provides the most evident effect. Preferably, the following condition can be met: 45.0 <EVd <125.0. More preferably, the following condition can be met: 50.0 <EVd <100.0.
[053] When a central thickness of the second lens element is CT2, and a central thickness of the fourth lens element is CT4, the following condition is met: 0 <CT2 / CT4 <1.04. Therefore, it is favorable, to reduce chromatic aberrations, to obtain appropriate thicknesses of the second lens element and the fourth lens element.
[054] When a radius of curvature of the outer surface of the first lens element is R1, and a radius of curvature of the inner surface of the first lens element is R2, the following condition is met: 0.32 <R1 / R2 <1 , 64. Therefore, it is favorable to reduce astigmatism by arranging the appropriate surface shape of the first lens element.
[055] When the radius of curvature of the inner surface of the first lens element is R2, and a radius of curvature of the outer surface of the fourth lens element is R7, the following condition is met: 0.25 <R2 / R7 <4 , 8.
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Therefore, it is favorable to correct the curvature of the field outside the optical axis by arranging the appropriate surface shapes of the first lens element and the fourth lens element.
[056] When the measurement is made according to the reference wavelength as line d, the focal length of the optical lens assembly is fd, the focal length of the third lens element is fd3, the focal length of the fourth element of lens is fd4, and the maximum of the two values of | fd / fd3 | e | fd / fd4 | is max (| fd / fd3 |, | fd / fd4 |), and the following condition is met: 0.43 <max (| fd / fd3 |, | fd / fd4 |) <2.7.
Therefore, it is favorable to correct the distortion by correlating the refractive power of the third lens element and the fourth lens element, while avoiding too weak or excessive refractive power. Preferably, the following condition can be met: 0.53 <
max (| fd / fd3 |, | fd / fd4 |) <1.8.
[0 57] When the measurement is made according with O length wave reference as the line d, one length focal of first element of lens is fd1, one length focal of second element of lens is fd2, O length focal of third element of lens is fd3, and O
focal length of the fourth lens element is fd4, the following condition is met: 0.38 <(| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 | + | 1 / fd4 |) <1, 5. Therefore, it is favorable to correct the spherical aberration and distortion by properly adjusting the distribution of the refractive power inside and outside the assembly and optical lens.
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17/94 [058] When an optical lens assembly f number is Fno, the following condition is met: 1.0 <Fno <2.3. Therefore, when the optical lens assembly is applied to a projection equipment, the illumination of an external conjugating surface of the same can be improved; when the optical lens assembly is applied to capture and imaging equipment or reception equipment, the illumination in a peripheral region of the internal conjugation surface of the same can be improved.
[059] When half a maximum field of view of the optical lens assembly is HFOV, the following condition is met: 5 degrees <HFOV <50 degrees. Therefore, it is favorable to avoid an excessive field of view, which would cause too many aberrations, such as distortions. Preferably, the following condition can be met: 30 degrees <HFOV <50 degrees. Thus, it is favorable to avoid a very small field of view, which would reduce the range of applications.
[060] When an axial distance between an outer surface of one of the lens elements closest to the outer surface and an inner surface of one of the lens elements closest to the inside is TD, the following condition is met: 1 mm <TD <5 mm. Therefore, it is favorable for a wider application to maintain the compact size of the optical lens assembly.
[061] When an axial distance between the outer surface of the first lens element and the inner mating surface of the optical lens assembly is TL, and a maximum radius of the effective optical region of
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18/94 internal conjugation surface of the optical lens assembly for IH, the following condition is met: 1.0 <
TL / IH <4.0. Therefore, it is favorable to obtain the balance between the widening of the effective optical region of the internal conjugation surface and the shortening of the total path length.
[062] When the radius of curvature of the inner surface of the first lens element is R2, and when the measurement is made according to the reference wavelength as line d, the focal length of the optical lens assembly is fd, the following condition is met: 0 <
R2 / fd <2.0. Therefore, it is favorable, in order to obtain the balance between the field of view and the total path length, to adjust the surface shape of the first lens element and the focal length of the optical lens assembly.
[063] When a central thickness of the first lens element is CT1, and an axial distance between the first lens element and the second lens element is T12, the following condition is met: 0.80 <CT1 / T12 <
3.5. Therefore, it is favorable to adapt to the design of the wide field of view by correlating the first lens element and the second lens element.
[064] When the measurement is made according to the reference wavelength as line d, the focal length of the optical lens assembly is fd, and the focal length of the third lens element is fd3, the satisfied: -2 , 5 <fd / fd3 <1, 1.
Therefore, the refractive power of the third lens element would not be very strong in order to avoid spherical aberrations following the condition
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19/94 when reducing the total travel length. Preferably, the following condition can be satisfied: 0 <fd / fd3 <1.1. Thus, it is favorable to decrease the angle of incidence or the angle of exit of the light on the internal conjugation surface by adjusting the light path through the positive refractive power of the third lens element.
[065] The optical lens assembly may additionally include an aperture stop located outside the second lens element. Therefore, it is favorable to obtain the compactness of the optical lens assembly, and to decrease the angle of incidence or angle of exit of the light on the internal conjugation surface. When an axial distance between the aperture limiter and the inner lens surface of the optical lens assembly is SL, and an axial distance between the outer surface of the first lens element and the inner lens surface of the optical lens assembly is TL, the following condition is met: 0.70 <SL / TL <1.1. Therefore, it is favorable to balance the field of view and the size of the optical lens assembly.
[066] The optical lens assembly can be applied to the infrared range within a wavelength ranging from 780 nm to 1500 nm in order to decrease the interference of visible light. In addition, the infrared bandwidth can be less than 40 nm, so that the accuracy of sensing can be improved.
[067] When the radius of curvature of the inner surface of the fourth lens element is R8, and when the
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20/94 measurement is made according to the reference wavelength as line d, the focal length of the optical lens assembly is fd, the following condition is satisfied: 0 <R8 / fd <1.75. Therefore, it is favorable to reduce the rear focal length by adjusting the shape of the surface of the fourth lens element and the focal length of the optical lens assembly.
[068] The electronic device may include projection equipment, which may include the optical lens assembly and at least one light source, in which the light source may be arranged on the inner connecting surface of the optical lens assembly. The optical lens assembly of the projection equipment can project light from the light source onto the outer conjugation surface. The light from the light source may be within the infrared range (780 nm - 1500 nm), the infrared range bandwidth may be less than 40 nm, and the optical lens assembly of the projection equipment may be applied to an infrared band. The projection equipment may include a diffraction element, an adjustable focus component or a reflective element (such as a prism or mirror), where it is favorable to project the light onto the projection surface evenly by the arrangement of the diffraction element, it is favorable refine the ability of light convergence by the arrangement of the adjustable focus component, and it is favorable to increase the flexibility of the spatial configuration by the arrangement of the reflective element.
[069] The electronic device may include receiving equipment, which may include the set of
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21/94 optical lens and an image sensor, in which the image sensor is arranged on the inner connecting surface of the optical lens assembly. Preferably, the optical lens assembly of the receiving equipment can be applied to an infrared range, where the image sensor can be used to detect light within the infrared range. The receiving equipment may additionally include another element with a filter function, such as a protective plate (such as glass, metal or plastic material), a filter, etc., or the optical lens assembly may include an element with a filter function , such as a filter, a lens element with a filter function, etc.
[070] The electronic device may include image capture equipment, which may include the optical lens assembly and an image sensor, in which the image sensor is arranged on the inner connecting surface of the optical lens assembly. Preferably, the optical lens assembly of the image capture equipment can be applied to an infrared range, where the image sensor can be used to detect light within the infrared range. The image capture equipment may additionally include another element with a filter function, such as a protective plate (such as glass, metal or plastic material), a filter, etc., or the optical lens assembly may include an element with function filter, such as a filter, a lens element with a filter function, etc.
[071] The electronic device may include a sensing module, which may include the
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22/94 above-mentioned projection or the aforementioned reception equipment, or it may include both the aforementioned projection equipment and the aforementioned reception equipment. The optical lens assembly of the projection equipment can project the light from the light source onto the outer conjugation surface. The optical lens assembly of the receiving equipment can be used to receive information on the outer mating surface of the optical lens assembly of the projection equipment, and then form the image on the image sensor thereof.
[072] When the measurement is made according to the reference wavelength as line d, at least six lens elements of the lens elements of the optical lens assembly of the projection equipment and lens elements of the lens assembly optics of the receiving equipment may have Abbe numbers less than 38. Therefore, it is favorable to improve the sensing accuracy and compactness of the module, especially applying to the infrared range, which can offer a better effect. Preferably, at least seven lens elements of the lens elements can have Abbe numbers less than 38. More preferably, at least eight lens elements of the lens elements can have Abbe numbers less than 38.
[073] In the optical lens assembly of each of the projection equipment and the receiving equipment, when an axial distance between an outer surface of one of the lens elements closest to the outside and an inner surface of one of the lens elements closest to the interior is TD, the following condition is
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23/94 satisfied: 1 mm <TD <5 mm. Therefore, it is favorable to obtain the compactness of the sensing module for application in portable devices.
[074] A total number of the lens elements in the optical lens assembly of the projection equipment can be four, so that it is favorable to the balance of the projection quality and compactness. A total number of the lens elements in the optical lens assembly of the receiving equipment can be four, so that it is favorable to the balance of image quality and compactness.
[075] At least six of the lens elements of the optical lens assembly of the projection equipment and the lens elements of the optical lens assembly of the receiving equipment may be made of plastic materials. Therefore, the difficulty of finishing and manufacturing can be reduced.
[076] In each of the aforementioned optical lens assemblies, at least one of the outer surface and the inner surface of one of the lens elements closest to the interior of each optical lens assembly may include at least one critical point. Therefore, it is favorable to correct aberrations outside the optical axis and to reduce their size.
[077] The aforementioned light source can be composed of an array of lasers, which can be formed into a light structure through the optical lens assembly of the projection lens system, and projected onto a sensed object. The optical lens assembly of the receiving equipment can receive reflective light from the sensed object,
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form the sensor image image, and information received can be calculated fur processor in so the get the relative distance in each part of object sensed, additionally obtaining the vari action with Format
3D on the surface of the sensed object. Structured light can use the structure, such as a dot, stain or stripe, etc., but it is not restricted to that. The three-dimensional sensing method can use structured light or time-of-flight (TOF) light coding, etc., but it is not restricted to this.
[078] Additionally, the aforementioned projection equipment can include a high directivity (low divergence) and a high intensity light source, where the light source can be a laser, SLED, Micro-LED, RCLED, a laser. vertical cavity surface emission (VECSEL), etc., and the light source can be a single light source or multiple light sources arranged on the inner conjugating surface of the optical lens assembly, in order to offer high projection quality . When the light source of the projection equipment according to the present disclosure is a laser emitting a vertical cavity surface and disposed on the internal conjugation surface of the optical lens assembly, it is favorable to provide a light source with high directivity, low divergence and high intensity due to the appropriate arrangement of light, so as to increase the illuminance of the external conjugating surface of the optical lens assembly.
[079] According to the electronic device of the present disclosure, the outside refers to the outside of the mechanism, and the inside refers to the inside of the mechanism.
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25/94
Taking image capture equipment as an example, the inner direction refers to a direction on the image side, the inner surface refers to a surface on the image side, the outer direction refers to a direction on the side of the image object, the outer surface refers to a surface on the side of the object. Taking the projection equipment as an example, the inner direction is a direction of the light source, that is, a reduction side, the inner surface is a light incidence surface, the outer direction is a projection direction, that is, one side of magnification, and the outer surface is a light-emitting surface. The internal conjugation surface is located on the focus surface within the mechanism, that is, the image surface of the image capture equipment, and the conjugation surface of the reduction side of the projection equipment. IH represents the maximum radius of the effective optical region of the internal conjugation surface in the optical lens assembly, that is, the maximum image height of the image capture equipment, and the maximum radius of the light source of the projection equipment.
[080] According to the present disclosure, the electronic device may additionally include, without limitation, a control unit, a display medium, a storage unit, a random access memory (RAM) unit, or a combination of them.
[081] In the electronic device of the present disclosure, the optical lens assembly can be applied to the visible light band, or to the infrared band. Preferably, the optical lens assembly can be applied
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26/94 to both the visible and infrared bands.
[082] According to the optical lens assembly of the present invention, the lens elements thereof may be made of glass or plastic materials. When the lens elements are made of glass materials, the distribution of the refractive power of the optical lens assembly can be more flexible in its design. When the lens elements are made of plastic materials, manufacturing costs can be reduced effectively. In addition, the surfaces of each lens element can be arranged to be aspherical, since the aspherical surface of the lens element is easy to form in another way than a spherical surface in order to have more controllable variables to eliminate aberrations of the same , and to further reduce the required amount of lens elements in the optical lens assembly. Therefore, the total travel length of the optical lens assembly can also be reduced.
[083] According to the optical lens assembly of the present disclosure, when a lens surface is aspheric, it means that the lens surface has an aspheric shape over its entire optically effective area, or one or more parts of it.
[084] According to the optical lens set of the present disclosure, each of an outer surface and an inner surface has a paraxial region and a region outside the optical axis. The paraxial region refers to the region of the surface where the rays of light propagate near an optical axis, and the region outside the optical axis
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27/94 refers to the region of the distant surface of the paraxial region. Particularly, unless otherwise indicated, when the lens element has a convex surface, it indicates that the surface may be convex in the paraxial region of the same, and when the lens element has a concave surface, it indicates that the surface it can be concave in the paraxial region of the same. According to the optical lens assembly of the present disclosure, the refractive power or focal length of a lens element being positive or negative can refer to the refractive power or focal length in a paraxial region of the lens element.
[085] According to the optical lens assembly of the present disclosure, the optical lens assembly may include at least one limiter, such as an aperture limiter, an obfuscation limiter, or a field limiter. Said glare limiter or said field limiter serves to eliminate spurious light and thereby improve its image resolution.
[086] According to the optical lens assembly of the present disclosure, the internal conjugation surface of the optical lens assembly, based on the corresponding image sensor or light source, can be flat or curved. In particular, the inner mating surface may be an outwardly curved concave surface. According to the optical lens assembly of the present disclosure, at least one correction element (such as a field planer) can be selectively disposed between the lens element closest to the interior of the optical lens assembly and the inner conjugation surface so
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28/94 to correct the image (such as field curvature). The properties of the correction element, such as curvature, thickness, refractive index, position, surface shape (convex / concave, spherical / aspherical / diffractive / Fresnel, etc.) can be adjusted according to the requirements of the equipment. In general, the correction element is preferably a thin plane-concave element having a concave surface towards the outside and is disposed close to the internal conjugation surface.
[087] According to the optical lens assembly of the present disclosure, an aperture limiter can be configured as a front limiter or an intermediate limiter. A front limiter disposed between an external conjugating surface and the first lens element can provide a greater distance between an exit pupil of the optical lens assembly and the internal conjugating surface, and thus obtain a telecentric effect, and improves the image sensing efficiency of the image sensor, such as a CCD or CMOS, or improves the projection efficiency. An intermediate limiter disposed between the first lens element and the internal conjugating surface is favorable to increase the field of view of the optical lens assembly and, thus, to provide a wider field of view for it.
[088] According to the optical lens assembly of the present disclosure, a critical point is a non-axial point on the lens surface where its tangent is perpendicular to the optical axis.
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29/94 [089] Each of the aforementioned aspects of the optical lens assembly can be used in various combinations to achieve the corresponding effects.
[090] According to the description of the present disclosure presented above, the following specific modalities are provided for further explanation.
<1- Mode>
[091] Fig. 1 is a schematic view of an electronic device according to the first embodiment of the present disclosure. FIg. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the first modality. In Fig. 1, the electronic device includes an optical lens assembly (its reference number is omitted), in which the optical lens assembly includes, in the order from the outside to the inside, an aperture limiter 100, a first lens 110, a second lens element 120, a third lens element 130, a fourth lens element 140, a filter 150 and an inner mating surface 160. The optical lens assembly includes four lens elements (110, 120, 130 and 140) without one or more additional lens elements inserted between the first lens element 110 and the fourth lens element 140.
[092] The first lens element 110 with positive refractive power has an external surface 111 being convex in a paraxial region of the same and an internal surface 112 being concave in a paraxial region of the same. The first lens element 110 is made of a material
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30/94 plastic, and has the outer surface 111 and the inner surface 112, both being aspherical.
[093] The second lens element 120 with negative refractive power has an external surface 121 being concave in a paraxial region of the same and an internal surface 122 being convex in a paraxial region of the same. The second lens element 120 is made of a plastic material, and has the outer surface 121 and the inner surface 122, both of which are aspherical.
[094] The third lens element 130 with positive refractive power has an external surface 131 being concave in a paraxial region of the same and an internal surface 132 being convex in a paraxial region of the same. The third lens element 130 is made of a plastic material, and has the outer surface 131 and the inner surface 132, both of which are aspherical.
[095] The fourth lens element 140 with negative refractive power has an external surface 141 being convex in a paraxial region of the same and an internal surface 142 being concave in a paraxial region of the same. The fourth lens element 140 is made of a plastic material, and has the outer surface 141 and the inner surface 142, both of which are aspherical. In addition, each of the outer surface 141 and the inner surface 142 of the fourth lens element 140 includes at least one critical point CP41, CP42 (illustrated in Fig. 25) in a region outside its optical axis.
[096] Filter 150 is made of a glass material and is located between the fourth lens element 140 and the
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31/94 internal conjugation surface 160, and will not affect the focal length of the optical lens assembly.
[097] The equation of the aspherical surface profiles of the lens elements of the aforementioned first mode is expressed as follows:
X (Y) = (y 7 R) / (l + sqrt (l - (l + k) x (Y / R))) + Σ (Α) * (Y ‘) i
Where,
X is the relative distance in between a dot at spaced aspheric surface in a distance Y a leave of the optical axis and the plan tangential at the vertex aspherical surface on the optical axis;
Y is the vertical distance from the point on the aspheric surface to the optical axis;
R is the radius of curvature;
k is the conical coefficient; and
Ai is the i-nth aspheric coefficient.
[098] In the optical lens assembly according ^to mode 1, when a focal length of the optical lens assembly is f, a number f of the optical lens assembly is Fno, and half of a maximum field of view of the lens assembly. optical lens is HFOV, these parameters have the following values: f = 2.40 mm; Fno = 1.48; and HFOV = 43.2 degrees.
[099] The optical lens assembly according to ^the first embodiment, when a measurement is made in accordance with a reference wavelength as a d - line (587.6 nm), a refractive index of the first lens element 110 is Nd1, the following condition is met: Nd1 = 1.614.
[0100] In the optical lens set and according to mode 1 ^a , when the measurement is made according to
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32/94 the reference wavelength as line d, a
number Abbe of first element in lens 110 is Vd1, one number Abbe of second element in lens 120 is Vd2, one number Abbe of third element in lens 130 is Vd3, one number Abbe of fourth element of lens 140 is Vd4 , and an
sum of the Abbe numbers of the first lens element 110, the second lens element 120, the third lens element 130 and the fourth lens element 140 is EVd (ie EVd = Vd1 + Vd2 + Vd3 + Vd4), the following conditions are satisfied: Vd1 = 26.0; Vd1 / Vd2 = 1.27; Vd1 / Vd3 = 1.27; Vd1 / Vd4 = 1.27; Vd2 = 20.4; Vd3 = 20.4; Vd4 = 20.4; and Ódd = 87.2.
[0101] In the optical lens assembly according ^to mode 1, when a central thickness of the first lens element 110 is CT1, and an axial distance between the first lens element 110 and the second lens element 120 is T12, the following condition is met: CT1 / T12 = 1.15.
[0102] In the optical lens assembly according ^to mode 1, when a central thickness of the second lens element 120 is CT2, and a central thickness of the fourth lens element 140 is CT4, the following condition is met: CT2 / CT4 = 0.72.
[0103] In the set of optical lens according to the first mode when an axial distance between an outer surface of one of the lens elements closest to the outside (i.e., the outer surface 111 of the first lens element 110 in 1 mode) and an inner surface of the lens closest to the inner elements (i.e., the inner surface 142 of the
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33/94 fourth lens element 140 in ^the first embodiment) is TD, the following condition is satisfied: TD = 2.26 mm.
[0104] In the optical lens assembly according ^to mode 1, when an axial distance between the outer surface 111 of the first lens element 110 and the inner mating surface 160 of the optical lens assembly is TL, and a maximum radius of an effective optical region of the inner mating surface 160 of the optical lens assembly is IH, the following condition is met: TL / IH = 1.48.
[0105] In the set of optical lens according to the first mode, when a radius of curvature of the outer surface 111 of the first lens element 110 is R1, a radius of curvature of the inner surface 112 of the first lens element 110 is R2 , and a radius of curvature of the outer surface 141 of the fourth lens element 140 is R7, the following conditions are met: R1 / R2 = 0.42; and R2 / R7 = 2.24.
[0106] In the set of optical lens according to the first mode, when the radius of curvature of the inner surface 112 of the first lens element 110 is R2, and when measurement is made according to the wavelength of reference as line d, the focal length of the optical lens assembly is fd, the following condition is met: R2 / fd = 1.32.
[0107] In the set of optical lens according to the first mode, when a radius of curvature of the inner surface 142 of the fourth lens element 140 is R8, and when measurement is made according to the wavelength of reference as line d, focal length
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34/94 of the optical lens assembly is fd, the following condition is met: R8 / fd = 0.41.
[0108] In the set of optical lens according to the first mode when the measurement is made in accordance with the reference wavelength as the d line, the focal length of the imaging lens assembly is d, the focal length third lens element 130 is fd3, the focal length of the fourth lens element 140 is fd4, and the maximum of the two values of | fd / fd3 | e | fd / fd4 | is max (| fd / fd3 |, | fd / fd4 |), the following conditions are met: fd / fd3 = 0.70; | fd / fd3 | + | fd / fd4 | = 0.98; and max (| fd / fd3 |, | fd / fd4 |) = 0.70.
[0109] In the optical lens set according ^to mode 1, when the measurement is made according to the reference wavelength such as line d, a focal length of the first lens element 110 is fd1, a focal length of second lens element 120 is fd2, the focal length of the third lens element 130 is fd3, and the focal length of the fourth lens element 140 is fd4, the following condition is met: (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 | + | 1 / fd4 |) = 0.75.
[0110] In the optical lens assembly according ^to mode 1, when an axial distance between the aperture stop 100 and the inner connecting surface 160 of the optical lens assembly is SL, and an axial distance between the outer surface 111 of the first lens element 110 and the inner mating surface 160 of the optical lens assembly is TL, the following condition is met: SL / TL = 0.92.
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35/94 [0111] The detailed optical data of the 1 modality are illustrated in Tables 1A and 1B, and the aspheric surface data are illustrated in Table 2 below.
Table 1A - 1 Modality f = 2.40 mm, Fno = 1.48, HFOV = 43.2 degrees N- daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Conjugation surfaceexternal Plan 600,000 1 LimiterinOpening Plan -0,281 2 Lens 1 1,274 ASP 0.453 Plas-tico 1,594 26.0 3.37 3 3,048 ASP 0.394 4 Lens 2 -16,319 ASP 0.328 Plas-tico 1,634 20.4 -88.86 5 -23,157 ASP 0.238 6 Lens 3 -1,035 ASP 0.370 Plas-tico 1,634 20.4 3.47 7 -0,801 ASP 0.022 8 Lens 4 1,362 ASP 0.453 Plas-tico 1,634 20.4 -8.24 9 0.941 ASP 0.500 10 Filter Plan 0.145 Glass 1,508 64.2 - 11 Plan 0.492 12 Internal conjugation surface Plan - The reference wavelength is 940.0 nm The effective radius of Surface 5 is 0.850 mm
Table 1B - 1 Modality fd = 2.30 mm N daSuper-surface Index Focal Length 0 Conjugation surface
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external 1 Aperture limiter 2 Lens 1 1,614 3.25 3 4 Lens 2 1,660 -85.36 5 6 Lens 3 1,660 3.30 7 8 Lens 4 1,660 -8.06 9 10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (line d).
Table 2 - Coefficients Aspherical N daSurface 2 3 4 5 k = -1.3621E + 00 9.8527E + 00 -6.2427E + 01 1.0348E + 01 A4 = 5.2900E-02 -5.1945E-02 -3.6923E-01 -3.4642E-01 A6 = 1.9592E-01 -1.8590E-01 7.1742E-01 1.1290E + 00 A8 = -7.9040E-02 7.7172E-01 -7.1766E + 00 -6.3080E + 00 A10 = -1.4209E + 00 -3.5484E + 00 3.1299E + 01 1.8207E + 01 A12 = 3.3859E + 00 6.3995E + 00 -8.0080E + 01 -2.8507E + 01 A14 = -2.4674E + 00 -6.2229E + 00 1.0372E + 02 2.1970E + 01 A16 = 2.3645E + 00 -5.0614E + 01 -5.7753E + 00 N daSurface 6 7 8 9 k = 1.8953E-01 -7.3447E + 00 -6.8788E-01 -4.8628E + 00 A4 = 2.3972E-01 -1.4078E + 00 -5.5202E-01 -2.6074E-01 A6 = 6.0228E-01 5.0381E + 00 5.5329E-01 2.6091E-01 A8 = -7.3869E + 00 -1.4183E + 01 -4.2818E-01 -1.9719E-01 A10 = 2.7483E + 01 2.5531E + 01 2.1197E-01 9.3754E-02 A12 = -4.4540E + 01 -2.5622E + 01 -6.1912E-02 -2.7309E-02 A14 = 3.3950E + 01 1.3254E + 01 9.7621E-03 4.4423E-03 A16 = -9.7250E + 00 -2.7856E + 00 -6.4485E-04 -3.0510E-04
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37/94 [0112] In Table 1A, the detailed optical data of ^the mode 1 in Fig. 1 are reported and in Table 1B, the refractive indices and the focal lengths of ^the first embodiment in Fig. 1 when the measurement is made according to the reference wavelength as the line d are declared, in which the radii of curvature, thicknesses and focal lengths are presented in millimeters (mm). The surface numbers 0 to 12 represent the surfaces arranged sequentially from the outside to the inside along the optical axis. In Table 2, k represents the conical coefficient of the aspheric surface profile equation. A4-A16 represent aspherical coefficients varying ^the order of 4 to 16 order. The tables below for each embodiment correspond to the schematic parameter and the aberration curves for each mode, and tables definitions of terms are equal to those of Table 1A, Table 1B and Table 2 ^the first embodiment. Therefore, an explanation in this regard will not be presented again.
<2 ^to Mode>
[0113] Fig. 3 is a schematic view of an electronic device according to the second embodiment of the present disclosure. Fig. 4 shows curves of spherical aberration, astigmatic field curves and a electronic device distortion curve according to ^the second embodiment. In Fig. 3, the electronic device includes an optical lens assembly (its reference number is omitted), in which the optical lens assembly includes, in the order from the outside to the inside, a first element of
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38/94 lens 210, an aperture stop 200, a second lens element 220, a third lens element 230, a fourth lens element 240, and an inner mating surface 260. The optical lens assembly includes four lens elements lens (210, 220, 230 and 240) without one or more additional lens elements inserted between the first lens element 210 and the fourth lens element 240.
[0114] The first lens element 210 with positive refractive power has an external surface 211 being convex in a paraxial region of the same and an internal surface 212 being concave in a paraxial region of the same. The first lens element 210 is made of a plastic material, and has the outer surface 211 and the inner surface 212, both of which are aspherical.
[0115] The second lens element 220 with positive refractive power has an external surface 221 being concave in a paraxial region of the same and an internal surface 222 being convex in a paraxial region of the same. The second lens element 220 is made of a plastic material, and has the outer surface 221 and the inner surface 222, both of which are aspherical.
[0116] The third lens element 230 with positive refractive power has an external surface 231 being concave in a paraxial region of the same and an internal surface 232 being convex in a paraxial region of the same. The third lens element 230 is made of a plastic material, and has the outer surface 231 and the inner surface 232, both of which are aspherical.
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39/94 [0117] The fourth lens element 240 with negative refractive power has an external surface 241 being convex in a paraxial region of the same and an internal surface 242 being concave in a paraxial region of the same. The fourth lens element 240 is made of a plastic material, and has the outer surface 241 and the inner surface 242, both of which are aspherical. In addition, each of the outer surface 241 and the inner surface 242 of the fourth lens element 240 includes at least one critical point in a region outside its optical axis.
[0118] The detailed optical data of mode 2 are illustrated in Tables 3A and 3B, and the aspheric surface data is shown in Table 4 below.
Table 3A - Modality 2 f = 1.63 mm, Fno = 1.65, HFOV = 45.0 degrees Surface N- Radius ofCurvature Specialsura Material Index N Abbe Comp.Focal 0 Surfaceinconjugationexternal Plan 400,000 1 Lens 1 1,237 ASP 0.336 Plas-tico 1,634 20.4 22.17 2 1,213 ASP 0.187 3 LimiterinOpening Plan 0.047 4 Lens 2 -3,277 ASP 0.423 Plas-tico 1,634 20.4 2.24 5 -1,041 ASP 0.642 6 Lens 3 -0,760 ASP 0.637 Plas-tico 1,634 20.4 1.67 7 -0,586 ASP 0.030 8 Lens 4 1,806 ASP 0.629 Plas-tico 1,634 20.4 -3.21 9 0.828 ASP 0.558 10 Surface Plan -
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40/94
inconjugationinternal The reference wavelength is 940.0 nm.
Table 3B - 2- Modality fd = 1.56 mm N- daSuper-surface Index Focal Length 0 External conjugation surface 1 Lens 1 1,660 20.66 2 3 Aperture Limiter 4 Lens 2 1,660 2.15 5 6 Lens 3 1,660 1.58 7 8 Lens 4 1,660 -3.11 9 10 Internal conjugation surface The reference wavelength is 587.6 nm (line d).
Table 4 - Coefficients Aspherical N daSurface 1 2 4 5 k = 4.6933E-01 -1.6476E + 01 3.2263E + 00 -3.7036E + 01 A4 = 1.4648E-01 1.4757E + 00 -1.0680E-01 -3.1352E + 00 A6 = 6.8742E-01 8.1862E-01 -3.3913E + 00 1.9765E + 01 A8 = -1.6208E + 00 -1.3581E + 01 3.1887E + 01 -9.7012E + 01 A10 = 3.2284E + 00 6.8848E + 01 -1.6057E + 02 2.6450E + 02 A12 = 2.6228E + 02 -3.6576E + 02 A14 = 1.5985E + 02 N- daSurface 6 7 8 9 k = -7.4296E-01 -1.1011E + 00 -1.6752E + 00 -8.4235E + 00 A4 = -2.7963E-02 2.8536E-01 1.4233E-02 -2.8891E-02 A6 = -9.8170E-01 -1.0091E + 00 -1.1356E-01 -6.2469E-02
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A8 = 4.3964E + 00 1.3120E + 00 1.1321E-01 6.7605E-02 A10 = -1.3214E + 01 -8.3178E-01 -6.1698E-02 -4.5801E-02 A12 = 1.8931E + 01 -3.4680E-01 1.5626E-02 1.9327E-02 A14 = -8.6942E + 00 5.7728E-01 -1.4251E-03 -4.5935E-03 A16 = 4.5328E-04
[0119] In ^the second embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. Moreover, the definitions of these parameters shown in the table below are the same as those stated in the first embodiment with ^the corresponding figures for ^the second embodiment, so an explanation in this regard will not be presented again.
[0120] Furthermore, these parameters can be calculated from Table 3A, Table 3B and Table 4 as the following values and satisfy the following conditions:
2 Modality f [mm] 1.63 CT2 / CT4 0.67 Fno 1.65 TD [mm] 2.93 HFOV [degrees] 45.0 TL / IH 1.97 Nd1 1,660 R1 / R2 1.02 Vd1 20.4 R2 / R7 0.67 Vd1 / Vd2 1.00 R2 / fd 0.78 Vd1 / Vd3 1.00 R8 / fd 0.53 Vd1 / Vd4 1.00 fd / fd3 0.99 Vd2 20.4 | fd / fd3 | + | fd / fd4 | 1.49 Vd3 20.4 max (| fd / fd3 |, | fd / fd4 |) 0.99 Vd4 20.4 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 | + | 1 / fd4 |) 0.54 3Vd 81.6 SL / TL 0.85 CT1 / T12 1.44
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42/94 <3 ^to Mode>
[0121] Fig. 5 is a schematic view of an electronic device according to the third embodiment of the present disclosure. FIg. 6 shows curves of spherical aberration, astigmatic field curves and a electronic device distortion curve according to ^the third embodiment. In Fig. 5, the electronic device includes an optical lens assembly (its reference number is omitted), in which the optical lens assembly includes, in the order from the outside to the inside, a first lens element 310, a lens limiter. aperture 300, a second lens element 320, a third lens element 330, a fourth lens element 340, and an inner mating surface 360. The optical lens assembly includes four lens elements (310, 320, 330 and 340 ) without one or more additional lens elements inserted between the first lens element 310 and the fourth lens element 340.
[0122] The first lens element 310 with positive refractive power has an external surface 311 being convex in a paraxial region of the same and an internal surface 312 being concave in a paraxial region of the same. The first lens element 310 is made of a plastic material, and has the outer surface 311 and the inner surface 312, both of which are aspherical.
[0123] The second lens element 320 with positive refractive power has an outer surface 321 being concave in a paraxial region of the same and an inner surface 322 being convex in a paraxial region.
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43/94 of the same. The second lens element 320 is made of a plastic material, and has the outer surface 321 and the inner surface 322, both of which are aspherical.
[0124] The third lens element 330 with positive refractive power has an outer surface 331 being concave in a paraxial region thereof and an inner surface 332 being convex in a paraxial region thereof. The third lens element 330 is made of a plastic material, and has the outer surface 331 and the inner surface 332, both of which are aspherical.
[0125] The fourth lens element 340 with negative refractive power has an external surface 341 being convex in a paraxial region of the same and an internal surface 342 being concave in a paraxial region of the same. The fourth lens element 340 is made of a plastic material, and has the outer surface 341 and the inner surface 342, both of which are aspherical. In addition, each of the outer surface 341 and the inner surface 342 of the fourth lens element 340 includes at least one critical point in a region outside its optical axis.
[0126] The detailed optical data of ^the third embodiment are illustrated in Tables 5A and 5B, and the aspheric surface data are illustrated in Table 6 below.
Table 5A - 3 ⁱⁿ Mode f = 1.62 mm, Fno = 1.65, HFOV = 45.0 degrees Surface N- Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Surfaceinconjugationexternal Plan 400,000
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1 Lens 1 1,093 ASP 0.341 PlasticO 1,634 20.4 14.75 2 1,087 ASP 0.177 3 Limiterinopening Plan 0.050 4 Lens2 -2,588 ASP 0.401 PlasticO 1,634 20.4 2.63 5 -1,074 ASP 0.711 6 Lens3 -0,806 ASP 0.581 PlasticO 1,634 20.4 2.05 7 -0,637 ASP 0.030 8 Lens4 1,619 ASP 0.649 PlasticO 1,634 20.4 -10.20 9 1,093 ASP 0.549 10 Surfaceinconjugationinternal Plan - The reference wavelength is 940.0 nm.
Table 5B - ^the mode 3 fd = 1.56 mm N- daSuper-surface Index Focal Length 0 External conjugation surface 1 Lens 1 1,660 13.80 2 3 Aperture limiter 4 Lens 2 1,660 2.52 5 6 Lens 3 1,660 1.94 7 8 Lens 4 1,660 -10.03 9 10 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
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Table 6 - Aspherical Coefficients N daSurface 1 2 4 5 k = -1.0215E-01 -1.6051E + 01 6.9732E + 00 -3.4932E + 01 A4 = 1.9975E-01 2.0097E + 00 -3.8666E-02 -2.9353E + 00 A6 = 4.0285E-01 -5.0791E + 00 -4.3589E + 00 2.0386E + 01 A8 = -5.3972E-01 1.9253E + 01 4.8798E + 01 -1.1270E + 02 A10 = 2.0449E + 00 -9.2315E + 00 -2.6927E + 02 3.7089E + 02 A12 = 5.2560E + 02 -6.6034E + 02 A14 = 4.6252E + 02 N- daSurface 6 7 8 9 k = -5.1586E-01 -1.0198E + 00 -1.2692E + 00 -6.9369E + 00 A4 = -7.8159E-02 8.9721E-02 1.1532E-02 -1.7541E-03 A6 = 9.6612E-01 -4.3741E-01 -1.5648E-01 -5.9643E-02 A8 = -3.9972E + 00 7.0880E-01 1.4892E-01 -1.4983E-02 A10 = 8.4049E + 00 -1.0647E + 00 -7.0741E-02 4.8039E-02 A12 = -7.9789E + 00 7.9482E-01 1.6068E-02 -2.5006E-02 A14 = 2.9939E + 00 -1.5188E-01 -1.3678E-03 5.2310E-03 A16 = -3.8834E-04
[0127] In ^the third embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment.
Besides that , the settings of these illustrated parameters at t abel a a follow are at same than those stated in 1 ^to modality with values corresponding to the 3 ^a modality , soon, an explanation in this regard it will not be
displayed again.
[0128] In addition, calculated from Table 6 as the following conditions values:
these parameters can be 5A, Table 5B and Table and satisfy the following
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^The mode 3 f [mm] 1.62 CT2 / CT4 0.62 Fno 1.65 TD [mm] 2.94 HFOV [degrees] 45.0 TL / IH 1.97 Nd1 1,660 R1 / R2 1.00 Vd1 20.4 R2 / R7 0.67 Vd1 / Vd2 1.00 R2 / fd 0.70 Vd1 / Vd3 1.00 R8 / fd 0.70 Vd1 / Vd4 1.00 fd / fd3 0.80 Vd2 20.4 | fd / fd3 | + | fd / fd4 | 0.96 Vd3 20.4 max (| fd / fd3 |, | fd / fd4 |) 0.80 Vd4 20.4 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3| + | 1 / fd4 |) 0.76 3Vd 81.6 SL / TL 0.85 CT1 / T12 1.50
<4 ^to Mode>
[0129] Fig. 7 is a schematic view of an electronic device according to the fourth embodiment of the present disclosure. Fig. 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the fourth modality. In Fig. 7, the electronic device includes an optical lens assembly (its reference numeral is omitted), in which the optical lens assembly includes, in order from the outside to the inside, a first lens element 410, a lens limiter. aperture 400, a second lens element 420, a third lens element 430, a fourth lens element 440, and an inner mating surface 460. The optical lens assembly includes four lens elements (410, 420, 430 and 440 ) without one or
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47/94 plus additional lens elements inserted between the first lens element 410 and the fourth lens element 440.
[0130] The first lens element 410 with negative refractive power has an external surface 411 being convex in a paraxial region of the same and an internal surface 412 being concave in a paraxial region of the same. The first lens element 410 is made of a plastic material, and has the outer surface 411 and the inner surface 412, both of which are aspherical.
[0131] The second lens element 420 with positive refractive power has an external surface 421 being concave in a paraxial region of the same and an internal surface 422 being convex in a paraxial region of the same. The second lens element 420 is made of a plastic material, and has the outer surface 421 and the inner surface 422, both of which are aspherical.
[0132] The third lens element 430 with positive refractive power has an external surface 431 being concave in a paraxial region of the same and an internal surface 432 being convex in a paraxial region of the same. The third lens element 430 is made of a plastic material, and has the outer surface 431 and the inner surface 432, both of which are aspherical.
[0133] The fourth lens element 440 with negative refractive power has an external surface 441 being convex in a paraxial region of the same and an internal surface 442 being concave in a paraxial region of the same. The fourth lens element 440 is made of a plastic material, and has the outer surface 441 and the
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48/94 internal surface 442, both being aspheric. In addition, each of the outer surface 441 and the inner surface 442 of the fourth lens element 440 includes at least one critical point in a region outside its optical axis.
[0134] The detailed optical data of ^the fourth embodiment are shown in Tables 7A and 7B, and the aspheric surface data are illustrated in Table 8 below.
Table 7A - 4 Modality f = 1.59 mm, Fno = 1.61, HFOV = 45.0 degrees N daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Surfaceinconjugationexternal Plan 400,000 1 Lens 1 1,242 ASP 0.365 PlasticO 1,641 19.5 -79.04 2 1,073 ASP 0.207 3 Limiterinopening Plan 0.053 4 Lens 2 -2,958 ASP 0.397 PlasticO 1,641 19.5 2.31 5 -1,040 ASP 0.772 6 Lens 3 -0,813 ASP 0.531 PlasticO 1,641 19.5 1.84 7 -0,604 ASP 0.010 8 Lens 4 1,278 ASP 0.555 PlasticO 1,641 19.5 -4.86 9 0.753 ASP 0.600 10 Surfaceinconjugationinternal Plan - The reference wavelength is 940.0 nm. The effective radius of Surface 5 is 0.585 mm.
Table 7B - ^the mode 4
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fd = 1.52 mm Surface N-and Index Focal Length 0 External conjugation surface 1 Lens 1 1,669 -88.21 2 3 Aperture Limiter 4 Lens 2 1,669 2.21 5 6 Lens 3 1,669 1.74 7 8 Lens 4 1,669 -4.75 9 10 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 8 - Coefficients Aspherical N- daSurface 1 2 4 5 k = -6.0399E-01 -5.0265E + 00 1.2585E + 01 -1.2856E + 01 A4 = 2.4218E-01 1.0636E + 00 -1.5753E-01 -1.4941E + 00 A6 = 3.6557E-01 2.2335E + 00 -1.9142E + 00 2.9042E + 00 A8 = -4.3131E-01 -1.1485E + 01 1.6396E + 01 2.7618E + 00 A10 = 1.2690E + 00 5.6090E + 01 -9.1465E + 01 -8.8844E + 01 A12 = 1.3354E + 02 3.2034E + 02 A14 = -4.1379E + 02 N- daSurface 6 7 8 9 k = -5.4814E-01 -1.1315E + 00 -1.8645E + 00 -6.8699E + 00 A4 = 2.2866E-01 3.0196E-01 -4.8631E-02 4.3969E-02 A6 = -3.2073E-01 -1.2726E + 00 -7.5137E-02 -2.0916E-01 A8 = -8.2726E-01 2.6891E + 00 9.5695E-02 2.0274E-01 A10 = 2.5898E + 00 -4.1102E + 00 -5.1304E-02 -1.1586E-01 A12 = -2.0211E + 00 3.3323E + 00 1.2120E-02 4.1039E-02 A14 = 6.6296E-01 -9.5129E-01 -1.0040E-03 -8.4306E-03 A16 = 7.5589E-04
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50/94 [0135] In ^the fourth embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. Moreover, the definitions of these parameters shown in the table below are the same as those stated in ^the embodiment 1 with corresponding values for ^the fourth embodiment, so an explanation in this regard will not be presented again.
[0136] Furthermore, these parameters can be calculated from Table 7A, Table 7B and Table 8 as the following values and satisfy the following conditions:
^The mode 4 f [mm] 1.59 CT2 / CT4 0.72 Fno 1.61 TD [mm] 2.89 HFOV [degrees] 45.0 TL / IH 1.99 Nd1 1,669 R1 / R2 1.16 Vd1 19.5 R2 / R7 0.84 Vd1 / Vd2 1.00 R2 / fd 0.71 Vd1 / Vd3 1.00 R8 / fd 0.50 Vd1 / Vd4 1.00 fd / fd3 0.87 Vd2 19.5 | fd / fd3 | + | fd / fd4 | 1.19 Vd3 19.5 max (| fd / fd3 |, | fd / fd4 |) 0.87 Vd4 19.5 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 |+ | 1 / fd4 |) 0.59 Σνά 77.8 SL / TL 0.84 CT1 / T12 1.40
<5 ^to Mode>
[0137] Fig. 9 is a schematic view of an electronic device according to the fifth modality of
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51/94 present revelation. Fig. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the fifth modality. In Fig. 9, the electronic device includes an optical lens assembly (its reference numeral is omitted), in which the optical lens assembly includes, in order from the outside to the inside, a first lens element 510, a lens limiter aperture 500, a second lens element 520, a third lens element 530, a fourth lens element 540, a filter 550 and an inner mating surface 560. The optical lens assembly includes four lens elements (510, 520, 530 and 540) without one or more additional lens elements inserted between the first lens element 510 and the fourth lens element 540.
[0138] The first lens element 510 with positive refractive power has an external surface 511 being convex in a paraxial region of the same and an internal surface 512 being concave in a paraxial region of the same. The first lens element 510 is made of a plastic material, and has the outer surface 511 and the inner surface 512, both of which are aspherical.
[0139] The second lens element 520 with positive refractive power has an external surface 521 being concave in a paraxial region of the same and an internal surface 522 being convex in a paraxial region of the same. The second lens element 520 is made of a plastic material, and has the outer surface 521 and the inner surface 522, both of which are aspherical.
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52/94 [0140] The third lens element 530 with positive refractive power has an external surface 531 being concave in a paraxial region of the same and an internal surface 532 being convex in a paraxial region of the same. The third lens element 530 is made of a plastic material, and has the outer surface 531 and the inner surface 532, both of which are aspherical.
[0141] The fourth lens element 540 with positive refractive power has an external surface 541 being convex in a paraxial region of the same and an internal surface 542 being concave in a paraxial region of the same. The fourth lens element 540 is made of a plastic material, and has the outer surface 541 and the inner surface 542, both of which are aspherical. In addition, each of the outer surface 541 and the inner surface 542 of the fourth lens element 540 includes at least one critical point in a region outside its optical axis.
[0142] The filter 550 is made of a glass material and is located between the fourth lens element 540 and the inner mating surface 560, and will not affect the focal length of the optical lens assembly.
[0143] The detailed optical data of ^the fifth embodiment are illustrated in Tables 9A and 9B, and the aspheric surface data is shown in Table 10 below.
Table 9A - 5 Modality f = 1.67 mm, Fno = 1.58, HFOV = 45. 2 degrees N daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal
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0 Surfaceinconjugationexternal Plan 400,000 1 Lens 1 0.972 ASP 0.271 PlasticO 1,641 19.5 9.29 2 1,035 ASP 0.189 3 LimiterinOpening Plan 0.074 4 Lens 2 -2,109 ASP 0.377 PlasticO 1,641 19.5 2.71 5 -1,020 ASP 0.821 6 Lens 3 -0,801 ASP 0.597 PlasticO 1,641 19.5 2.63 7 -0,701 ASP 0.010 8 Lens 4 1,442 ASP 0.557 PlasticO 1,641 19.5 14.42 9 1,450 ASP 0.350 10 Filter Plan 0.100 Glass 1,508 64.2 - 11 Plan 0.143 12 Surfaceinconjugationinternal Plan - The reference wavelength is 940.0 nm. The effective radius of Surface 5 is 0.630 mm.
Table 9B - 5- Modality fd = 1.62 mm N- daSuper-surface Index Focal Length 0 External conjugation surface 1 Lens 1 1,669 8.76 2 3 Aperture Limiter 4 Lens 2 1,669 2.59 5 6 Lens 3 1,669 2.47 7 8 Lens 4 1,669 13.48
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9 10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 10 - Aspheric Coefficients N- daSurface 1 2 4 5 k = 5.8634E-01 -4.1733E + 00 7.8306E + 00 -1.8060E + 01 A4 = 1.2889E-01 9.3735E-01 -1.7415E-01 -1.9324E + 00 A6 = 1.1116E-01 1.4462E-01 -1.1159E + 00 8.2476E + 00 A8 = 3.2883E-02 1.0082E + 00 1.0336E + 01 -3.1133E + 01 A10 = 1.7659E + 00 1.4161E + 01 -5.1790E + 01 6.4831E + 01 A12 = 8.1969E + 01 -5.7203E + 01 A14 = -9.9270E + 00 N- daSurface 6 7 8 9 k = -5.1704E-01 -9.5378E-01 -1.3946E + 00 -3.6371E + 00 A4 = -7.8171E-02 -3.8642E-03 6.7368E-02 1.7683E-01 A6 = 8.6137E-01 -1.7672E-01 -2.9215E-01 -4.9344E-01 A8 = -2.9824E + 00 2.0628E-01 2.6041E-01 4.4014E-01 A10 = 5.2777E + 00 -2.5365E-01 -1.1197E-01 -2.1173E-01 A12 = -3.9481E + 00 1.1391E-01 2.2991E-02 5.8806E-02 A14 = 1.1316E + 00 3.0979E-02 -1.7837E-03 -9.1865E-03 A16 = 6.4250E-04
[0144] In ^the fifth embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment.
Besides that , the settings of these illustrated parameters at t abel a a follow are at same than those stated in 1 ^to modality with values corresponding to the 5 ^to modality , soon, an explanation in this regard it will not be
displayed again.
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55/94 [0145] In addition, these parameters can be calculated from Table 9A, Table 9B and Table 10 as the following values and satisfy the following conditions:
5 Modality f [mm] 1.67 CT2 / CT4 0.68 Fno 1.58 TD [mm] 2.90 HFOV [degrees] 45.2 TL / IH 1.92 Nd1 1,669 R1 / R2 0.94 Vd1 19.5 R2 / R7 0.72 Vd1 / Vd2 1.00 R2 / fd 0.64 Vd1 / Vd3 1.00 R8 / fd 0.90 Vd1 / Vd4 1.00 fd / fd3 0.65 Vd2 19.5 | fd / fd3 | + | fd / fd4 | 0.77 Vd3 19.5 max (| fd / fd3 |, | fd / fd4 |) 0.65 Vd4 19.5 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3| + | 1 / fd4 |) 1.05 TVd 77.8 SL / TL 0.87 CT1 / T12 1.03
<6 ^to Mode>
[0146] Fig. 11 is a schematic view of an electronic device according to the sixth embodiment of the present disclosure. Fig. 12 shows curves of spherical aberration, astigmatic field curves and a electronic device distortion curve according to ^the sixth embodiment. In Fig. 11, the electronic device includes an optical lens assembly (its reference numeral is omitted), in which the optical lens assembly includes, in order from the outside to the inside, a first lens element 610, a lens limiter. aperture 600, a second lens element 620, a third lens element 630,
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56/94 a fourth lens element 640, a filter 650 and an inner mating surface 660. The optical lens assembly includes four lens elements (610, 620, 630 and 640) without one or more additional lens elements inserted between the first lens element 610 and the fourth lens element 640.
[0147] The first lens element 610 with positive refractive power has an external surface 611 being convex in a paraxial region of the same and an internal surface 612 being concave in a paraxial region of the same. The first lens element 610 is made of a plastic material, and has the outer surface 611 and the inner surface 612, both of which are aspherical.
[0148] The second lens element 620 with positive refractive power has an external surface 621 being concave in a paraxial region of the same and an internal surface 622 being convex in a paraxial region of the same. The second lens element 620 is made of a plastic material, and has the outer surface 621 and the inner surface 622, both of which are aspherical.
[0149] The third lens element 630 with negative refractive power has an external surface 631 being concave in a paraxial region of the same and an internal surface 632 being convex in a paraxial region of the same. The third lens element 630 is made of a plastic material, and has the outer surface 631 and the inner surface 632, both of which are aspherical.
[0150] The fourth lens element 640 with positive refractive power has an outer surface 641 being convex in a paraxial region of the same and a
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57/94 internal surface 642 being concave in a paraxial region of the same. The fourth lens element 640 is made of a plastic material, and has the outer surface 641 and the inner surface 642, both of which are aspherical. In addition, the inner surface 642 of the fourth lens element 640 includes at least one critical point in a region outside its central axis.
[0151] The filter 650 is made of a glass material and is located between the fourth lens element 640 and the inner mating surface 660, and will not affect the focal length of the optical lens assembly.
[0152] The detailed optical data of ^the sixth embodiment are illustrated in Tables 11A and 11B, and the aspheric surface data are illustrated in Table 12 below.
Table 11A - 6 Modality f = 1.84 mm, Fno = 2.00, HFOV = 35.0 degrees N daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Surfaceinconjugationexternal Plan 1000.000 1 Lens 1 0.972 ASP 0.344 Plas-tico 1,536 56.1 5.29 2 1,295 ASP 0.137 3 LimitedinOpening Plan 0.122 4 Lens 2 -4,092 ASP 0.745 Plas-tico 1,535 56.0 2.13 5 -0,948 ASP 0.236 6 Lens 3 -0,313 ASP 0.370 Plas-tico 1,535 56.0 -1.62 7-0,692 ASP 0.030 8 Lens 4 0.715 ASP 0.969 Plas-tico 1,535 56.0 1.54 9 2,820 ASP 0.500
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10 Filter Plan 0.210 Glass 1,508 64.2 - 11 Plan 0.127 12 Surfaceinconjugationinternal Plan - The reference wavelength is 940.0 nm.
Table 11B - 6- Modality fd = 1.80 mm N- daSuper-surface Index Focal Length 0 External conjugation surface 1 Lens 1 1,545 5.19 2 3 Aperture Limiter 4 Lens 2 1,544 2.09 5 6 Lens 3 1,544 -1.60 7 8 Lens 4 1,544 1.52 9 10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 12 - Coefficients Aspherical N- daSurface 1 2 4 5 k = 6.1836E-01 4.0166E + 00 -9.7783E + 00 4.7583E-02 A4 = 1.3739E-01 -2.8248E-02 -3.9856E-01 9.2090E-02 A6 = 2.0678E-02 1.0450E + 00 -3.6645E + 00 1.2572E + 00 A8 = 9.1300E-01 -8.5701E + 00 2.6609E + 01 -6.4258E-01 A10 = -1.3357E + 02 1.4704E + 01
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A12 = 2.9577E + 01 A14 = 1.9416E + 01 N- daSurface 6 7 8 9 k = -1.8931E + 00 -1.0086E + 00 -3.9034E + 00 -8.4049E-01 A4 = 4.3852E-01 3.1018E-01 -1.0149E-01 -5.0401E-02 A6 = -9.1531E + 00 -2.1623E + 00 1.5353E-01 -1.2050E-01 A8 = 3.4314E + 01 5.1394E + 00 -1.3382E-01 1.9224E-01 A10 = -5.1998E + 01 -4.9759E + 00 6.1681E-02 -1.3516E-01 A12 = 3.7372E + 01 1.8651E + 00 -1.4948E-02 4.1994E-02 A14 = -1.0742E + 01 -5.0119E-03
[0153] In embodiment 6, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. Moreover, the definitions of these parameters shown in the table below are the same as those stated in ^the embodiment 1 with corresponding values for ^the sixth embodiment, so an explanation in this regard will not be presented again.
[0154] In addition, these parameters can be calculated from Table 11A, Table 11B and Table 12 as the following values and satisfy the following conditions:
6 Modality f [mm] 1.84 CT2 / CT4 0.77 Fno 2.00 TD [mm] 2.95 HFOV [degrees] 35.0 TL / IH 2.95 Nd1 1,545 R1 / R2 0.75 Vd1 56.1 R2 / R7 1.81 Vd1 / Vd2 1.00 R2 / fd 0.72
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Vd1 / Vd3 1.00 R8 / fd 1.56 Vd1 / Vd4 1.00 fd / fd3 -1.13 Vd2 56.0 | fd / fd3 | + | fd / fd4 | 2.32 Vd3 56.0 max (| fd / fd3 |, | fd / fd4 |) 1.19 Vd4 56.0 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 | + | 1 / fd4 |) 0.52 2Vd 224.0 SL / TL 0.87 CT1 / T12 1.33
<7 ^to Mode>
[0155] Fig. 13 is a schematic view of an electronic device according to the seventh embodiment of the present disclosure. Fig. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve for the electronic device according to the seventh modality. In Fig. 13, the electronic device includes an optical lens assembly (its reference numeral is omitted), in which the optical lens assembly includes, in order from the outside to the inside, a first lens element 710, a lens limiter aperture 700, a second lens element 720, a third lens element 730, a fourth lens element 740, a filter 750 and an inner mating surface 760. The optical lens assembly includes four lens elements (710, 720, 730 and 740) without one or more additional lens elements inserted between the first lens element 710 and the fourth lens element 740.
[0156] The first lens element 710 with positive refractive power has an outer surface 711 being convex in a paraxial region of the same and an inner surface 712 being concave in a paraxial region.
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61/94 of the same. The first lens element 710 is made of a plastic material, and has the outer surface 711 and the inner surface 712, both of which are aspherical.
[0157] The second lens element 720 with positive refractive power has an external surface 721 being concave in a paraxial region of the same and an internal surface 722 being convex in a paraxial region of the same. The second lens element 720 is made of a plastic material, and has the outer surface 721 and the inner surface 722, both of which are aspherical.
[0158] The third lens element 730 with negative refractive power has an external surface 731 being concave in a paraxial region of the same and an internal surface 732 being convex in a paraxial region of the same. The third lens element 730 is made of a plastic material, and has the outer surface 731 and the inner surface 732, both of which are aspherical.
[0159] The fourth lens element 740 with positive refractive power has an external surface 741 being convex in a paraxial region of the same and an internal surface 742 being concave in a paraxial region of the same. The fourth lens element 740 is made of a plastic material, and has the outer surface 741 and the inner surface 742, both of which are aspherical. In addition, the inner surface 742 of the fourth lens element 740 includes at least one critical point in a region outside its central axis.
[0160] The 750 filter is made of a glass material and is located between the fourth lens element
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740 and the inner mating surface 760, and will not affect the focal length of the optical lens assembly.
[0161] The detailed embodiment of ^the optical data 7 are illustrated in Tables 13A and 13B, and the aspheric surface data is shown in Table 14 below.
Table 13A - 7 Modality f = 1.84 mm, Fno = 2.00, HFOV = 35.0 degrees Surface N Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Surface andexternal conjugation Plan 1000.000 1 Lens 1 1,005 ASP 0.374 Plas-tico 1,618 22.5 4.53 2 1,344 ASP 0.209 3 LimiterinOpening Plan 0.163 4 Lens 2 -2,924 ASP 0.689 Plas-tico 1,618 22.5 2.18 5 -1,005 ASP 0.229 6 Lens 3 -0,340 ASP 0.347 Plas-tico 1,618 22.5 -1.56 7 -0,730 ASP 0.030 8 Lens 4 0.778 ASP 0.893 Plas-tico 1,618 22.5 1.47 9 3,090 ASP 0.500 10 Filter Plan 0.210 Glass 1,508 64.2 - 11 Plan 0.140 12 Surface andinternal conjugation Plan - The reference wavelength is 940.0 nm.
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Table 13B - 7 Modality fd = 1.76 mm N daSuper-surface Index Focal Length 0 External conjugation surface 1 Lens 1 1,642 4.33 2 3 Aperture Limiter 4 Lens 2 1,642 2.09 5 6 Lens 3 1,642 -1.52 7 8 Lens 4 1,642 1.41 9 10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 14 - Coefficients Aspherical N daSurface 1 2 4 5 k = -5.9630E-01 3.5943E + 00 -3.3220E + 00 3.6458E-02 A4 = 2.0767E-01 -3.4294E-02 -5.8724E-01 -9.8875E-02 A6 = 1.8033E-01 1.6371E-01 -1.0831E + 00 -8.7868E-01 A8 = 3.7078E-01 -3.4760E + 00 8.8810E-02 2.4206E + 00 A10 = -3.5630E + 01 1.9241E + 01 A12 = 3.5364E + 01 A14 = 2.3156E + 01 N daSurface 6 7 8 9 k = -1.9412E + 00 -9.9475E-01 -4.5839E + 00 3.8486E-01 A4 = 4.7519E-01 2.8880E-01 -7.3312E-02 -4.6224E-02
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A6 = -9.5533E + 00 -2.0738E + 00 9.1987E-02 -1.4985E-01 A8 = 3.6391E + 01 5.2460E + 00 -5.5296E-02 2.5475E-01 A10 = -5.8023E + 01 -5.3727E + 00 1.1194E-02 -1.9055E-01 A12 = 4.4998E + 01 2.0601E + 00 -1.9353E-03 6.4120E-02 A14 = -1.4167E + 01 -8.2200E-03
[0162] In ^the seventh embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. Moreover, the definitions of these parameters shown in the table below are the same as those stated in the seventh embodiment with ^the corresponding figures for ^the third embodiment, so an explanation in this regard will not be presented again.
[0163] In addition, these parameters can be calculated from Table 13A, Table 13B and Table 14 as the following values and satisfy the following conditions:
7 Modality f [mm] 1.84 CT2 / CT4 0.77 Fno 2.00 TD [mm] 2.93 HFOV [degrees] 35.0 TL / IH 2.94 Nd1 1,642 R1 / R2 0.75 Vd1 22.5 R2 / R7 1.73 Vd1 / Vd2 1.00 R2 / fd 0.76 Vd1 / Vd3 1.00 R8 / fd 1.75 Vd1 / Vd4 1.00 fd / fd3 -1.16 Vd2 22.5 | fd / fd3 | + | fd / fd4 | 2.41 Vd3 22.5 max (| fd / fd3 |, | fd / fd4 |) 1.25 Vd4 22.5 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 |+ | 1 / fd4 |) 0.52
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2Vd 89.9 SL / TL 0.85 CT1 / T12 1.01
<8 ^to Mode>
[0164] Fig. 15 is a schematic view of an electronic device according to the eighth embodiment of the present disclosure. FIg. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the eighth modality. In Fig. 15, the electronic device includes an optical lens assembly (its reference numeral is omitted), in which the optical lens assembly includes, in the order from the outside to the inside, a first lens element 810, a lens limiter aperture 800, a second lens element 820, a third lens element 830, a fourth lens element 840, a filter 850 and an inner mating surface 860. The optical lens assembly includes four lens elements (810, 820, 830 and 840) without one or more additional lens elements inserted between the first lens element 810 and the fourth lens element 840.
[0165] The first lens element 810 with positive refractive power has an external surface 811 being convex in a paraxial region of the same and an internal surface 812 being concave in a paraxial region of the same. The first lens element 810 is made of a plastic material, and has the outer surface 811 and the inner surface 812, both of which are aspherical.
[0166] The second lens element 820 with positive refractive power has an outer surface 821
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66/94 being concave in a paraxial region of the same and an internal surface 822 being convex in a paraxial region of the same. The second lens element 820 is made of a plastic material, and has the outer surface 821 and the inner surface 822, both of which are aspherical.
[0167] The third lens element 830 with negative refractive power has an external surface 831 being concave in a paraxial region of the same and an internal surface 832 being convex in a paraxial region of the same. The third lens element 830 is made of a plastic material, and has the outer surface 831 and the inner surface 832, both of which are aspherical.
[0168] The fourth lens element 840 with positive refractive power has an external surface 841 being convex in a paraxial region of the same and an internal surface 842 being concave in a paraxial region of the same. The fourth lens element 840 is made of a plastic material, and has the outer surface 841 and the inner surface 842, both of which are aspherical. In addition, the inner surface 842 of the fourth lens element 840 includes at least one critical point in a region outside its central axis.
[0169] Filter 850 is made of a glass material and is located between the fourth lens element 840 and the inner mating surface 860, and will not affect the focal length of the optical lens assembly.
[0170] The detailed optical data of ^the eighth embodiment are illustrated in Tables 15A and 15B, and the aspheric surface data are illustrated in Table 16 below.
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Table 15A - 8- Modality f = 1.82 mm, Fno = 2.00, HFOV = 35.0 degrees N daSuper-surface Curvature Radius Thickfrog Kill-rial Index N Abbe Comp.Focal 0 External conjugation surface Plan 1000.000 1 Lens 1 1,086 ASP 0.547 Plas-tico 1,634 20.4 5.12 2 1,313 ASP 0.164 3 LimiterinOpening Plan 0.145 4 Lens 2 -2,887 ASP 0.720 Plas-tico 1,617 23.5 1.88 5 -0.908 ASP 0.193 6 Lens 3 -0,334 ASP 0.313 Plas-tico 1,634 20.4 -1.60 7 -0,679 ASP 0.030 8 Lens 4 0.774 ASP 0.782 Plas-tico 1,617 23.5 1.50 9 2,881 ASP 0.500 10 Filter Plan 0.210 Glass 1,508 64.2 - 11 Plan 0.164 12 Conjugation surfaceinternal Plan - The reference wavelength is 940.0 nm. The effective radius of Surface 5 is 0.730 mm.
Table 15B - 8 Modality fd = 1.76 mm N daSuper-surface Index Focal Length 0 External conjugation surface 1 Lens 1 1,660 4.86 2 3 Aperture Limiter
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4 Lens 2 1,639 1.82 5 6 Lens 3 1,660 -1.56 7 8 Lens 4 1,639 1.45 9 10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 16 - Coefficients Aspherical N daSurface 1 2 4 5 k = -1.1773E + 00 4.2787E + 00 1.4436E + 01 -1.6411E-02 A4 = 2.0869E-01 -9.8939E-02 -5.5609E-01 -2.3617E-01 A6 = 1.0093E-01 -1.6956E-01 -1.1558E + 00 1.5467E-01 A8 = 1.9955E-01 -4.9746E + 00 -1.9035E-02 -6.1069E + 00 A10 = -5.5220E + 01 2.7565E + 01 A12 = -4.7288E + 01 A14 = 2.9985E + 01 N- daSurface 6 7 8 9 k = -2.0087E + 00 -1.0909E + 00 -5.3036E + 00 -1.3323E + 00 A4 = -1.8137E-01 2.0326E-01 3.6630E-02 -4.0908E-02 A6 = -3.4733E + 00 -9.9821E-01 -3.8820E-02 -2.4040E-02 A8 = 1.4158E + 01 2.6426E + 00 -2.5734E-02 -4.7867E-02 A10 = -1.8049E + 01 -2.9200E + 00 3.7060E-02 7.1935E-02 A12 = 9.0815E + 00 1.2296E + 00 -1.3734E-02 -3.5434E-02 A14 = -1.2211E + 00 5.6570E-03
[0171] In the embodiment 8, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. In addition, the definitions of these parameters illustrated in
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69/94 the following table are the same as those stated in the first mode with corresponding values for the 8 mode, so an explanation in this regard will not be displayed again.
[0172] Furthermore, these parameters can be calculated from Table 15A, Table 15B and Table 16 as the following values and satisfy the following conditions:
8 Modality f [mm] 1.82 CT2 / CT4 0.92 Fno 2.00 TD [mm] 2.89 HFOV [degrees] 35.0 TL / IH 2.93 Nd1 1,660 R1 / R2 0.83 Vd1 20.4 R2 / R7 1.70 Vd1 / Vd2 0.87 R2 / fd 0.75 Vd1 / Vd3 1.00 R8 / fd 1.64 Vd1 / Vd4 0.87 fd / fd3 -1.13 Vd2 23.5 | fd / fd3 | + | fd / fd4 | 2.34 Vd3 20.4 max (| fd / fd3 |, | fd / fd4 |) 1.22 Vd4 23.5 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 |+ | 1 / fd4 |) 0.57 3Vd 87.8 SL / TL 0.81 CT1 / T12 1.77
<9 ^to Mode>
[0173] Fig. 17 is a schematic view of an electronic device according to the ninth embodiment of the present disclosure. Fig. 18 shows curves of spherical aberration, astigmatic field curves and a electronic device distortion curve according to ^the ninth embodiment. In Fig. 17, the electronic device includes an optical lens assembly (its reference number is
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70/94 omitted), wherein the optical lens assembly includes, in order from the outside to the inside, an aperture stop 900, a first lens element 910, a second lens element 920, a third lens element 930, a fourth lens element 940, a filter 950 and an inner mating surface 960. The optical lens assembly includes four lens elements (910, 920, 930 and 940) without one or more additional lens elements inserted between the first element lens 910 and the fourth lens element 940.
[0174] The first lens element 910 with positive refractive power has an external surface 911 being convex in a paraxial region of the same and an internal surface 912 being concave in a paraxial region of the same. The first lens element 910 is made of a glass material, and has the outer surface 911 and the inner surface 912, both of which are aspherical.
[0175] The second lens element 920 with positive refractive power has an external surface 921 being convex in a paraxial region of the same and an internal surface 922 being convex in a paraxial region of the same. The second lens element 920 is made of a plastic material, and has the outer surface 921 and the inner surface 922, both of which are aspherical.
[0176] The third lens element 930 with positive refractive power has an external surface 931 being concave in a paraxial region of the same and an internal surface 932 being convex in a paraxial region of the same. The third 930 lens element is made of a
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71/94 plastic material, and has the outer surface 931 and the inner surface 932, both of which are aspherical.
[0177] The fourth lens element 940 with negative refractive power has an external surface 941 being convex in a paraxial region of the same and an internal surface 942 being concave in a paraxial region of the same. The fourth lens element 940 is made of a plastic material, and has the outer surface 941 and the inner surface 942, both of which are aspherical. In addition, each of the outer surface 941 and the inner surface 942 of the fourth lens element 940 includes at least one critical point in a region outside its optical axis.
[0178] The filter 950 is made of a glass material and is located between the fourth lens element 940 and the inner mating surface 960, and will not affect the focal length of the optical lens assembly.
[0179] The detailed optical data of ^the ninth embodiment are illustrated in Tables 17A and 17B, and the aspheric surface data are illustrated in Table 18 below.
Table 17A - 9 Modality f = 2.41 mm, Fno = 1.51, HFOV = 43.2 degrees N daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Conjugation surfaceexternal Plan Infi-nito 1 LimiterinOpening Plan -0.228 2 Lens 1 1,436 ASP 0.505 Glass 1,704 29.2 3.67
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3 2,759 ASP 0.318 4 Lens 2 203,542 ASP 0.380 Plas-tico 1,637 20.4 9.52 5 -6,252 ASP 0.248 6 Lens 3 -1,025 ASP 0.525 Plas-tico 1,619 23.3 3.06 7 -0,795 ASP 0.010 8 Lens 4 1,384 ASP 0.428 Plas-tico 1,629 21.8 -4.47 9 0.817 ASP 0.500 10 Filter Plan 0.080 Glass 1,510 64.2 - 11 Plan 0.493 12 Conjugation surfaceinternal Plan - The reference wavelength is 850.0 nm. The effective radius of Surface 5 is 0.850 mm
Table 17B - 9- Modality fd = 2.33 mm Surface N-and Index Focal Length 0 External conjugation surface 1 Aperture Limiter 2 Lens 1 1,722 3.57 3 4 Lens 2 1,660 9.20 5 6 Lens 3 1,639 2.94 7 8 Lens 4 1,650 -4.37 9
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10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 18 - Coefficients Aspherical N daSurface 2 3 4 5 k = -1.3343E + 00 6.3565E + 00 -8.9972E + 01 -4.8494E + 01 A4 = 3.5787E-02 -4.9881E-02 -3.0267E-01 -9.6327E-02 A6 = 1.7787E-01 -4.0814E-01 6.2513E-01 -9.2262E-01 A8 = -6.5441E-01 1.5443E + 00 -6.3569E + 00 3.3913E + 00 A10 = 1.0055E + 00 -5.2769E + 00 2.5668E + 01 -8.7653E + 00 A12 = -5.4588E-01 8.1632E + 00 -6.5289E + 01 1.2365E + 01 A14 = -1.7034E-01 -6.6066E + 00 8.7135E + 01 -7.0062E + 00 A16 = 2.2806E + 00 -4.4184E + 01 1.0664E + 00 N- daSurface 6 7 8 9 k = 1.1219E-01 -6.1301E + 00 -7.0290E-01 -5.2049E + 00 A4 = 5.4399E-01 -9.7256E-01 -5.8326E-01 -2.3673E-01 A6 = -2.5780E + 00 2.7659E + 00 5.7715E-01 2.0545E-01 A8 = 8.7026E + 00 -6.3750E + 00 -4.0796E-01 -1.2917E-01 A10 = -1.8769E + 01 9.7826E + 00 1.8578E-01 5.1537E-02 A12 = 2.8770E + 01 -8.3215E + 00 -5.1432E-02 -1.2748E-02 A14 = -2.4759E + 01 3.5985E + 00 7.8871E-03 1.7819E-03 A16 = 8.7402E + 00 -6.2474E-01 -5.1549E-04 -1.0640E-04
[0180] In embodiment 9, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment.
Besides that , the settings of these illustrated parameters at t abel a a follow are at same than those stated in 1 ^to modality with values corresponding to the 9 ^a modality , soon, an explanation in this regard it will not be
displayed again.
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74/94 [0181] In addition, these parameters can be calculated from Table 17A, Table 17B and Table 18 as the following values and satisfy the following conditions:
9 Modality f [mm] 2.41 CT2 / CT4 0.89 Fno 1.51 TD [mm] 2.41 HFOV [degrees] 43.2 TL / IH 1.52 Nd1 1,722 R1 / R2 0.52 Vd1 29.2 R2 / R7 1.99 Vd1 / Vd2 1.43 R2 / fd 1.18 Vd1 / Vd3 1.26 R8 / fd 0.35 Vd1 / Vd4 1.34 fd / fd3 0.79 Vd2 20.4 | fd / fd3 | + | fd / fd4 | 1.33 Vd3 23.3 max (| fd / fd3 |, | fd / fd4 |) 0.79 Vd4 21.8 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 |+ | 1 / fd4 |) 0.68 2Vd 94.7 SL / TL 0.93 CT1 / T12 1.59
<10 ^to Mode>
[0182] Fig. 19 is a schematic view of an electronic device according to the tenth embodiment of the present disclosure. Fig. 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the electronic device according to the tenth modality. In Fig. 19, the electronic device includes an optical lens assembly (its reference number is omitted), in which the optical lens assembly includes, in order from the outside to the inside, an aperture limiter 1000, a first lens 1010, a second lens element 1020, a third lens element 1030,
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75/94 a fourth lens element 1040, a filter 1050 and an inner mating surface 1060. The optical lens assembly includes four lens elements (1010, 1020, 1030 and
1040) without one or more elements of lens additional inserted between O first element of lens 1010 and the bedroom element in 1040 lens.
[0183] The first lens element 1010 with positive refractive power has an external surface 1011 being convex in a paraxial region of the same and an internal surface 1012 being concave in a paraxial region of the same. The first lens element 1010 is made of a plastic material, and has the outer surface 1011 and the inner surface 1012, both of which are aspherical.
[0184] The second lens element 1020 with positive refractive power has an external surface 1021 being concave in a paraxial region of the same and an internal surface 1022 being convex in a paraxial region of the same. The second lens element 1020 is made of a plastic material, and has the outer surface 1021 and the inner surface 1022, both of which are aspherical.
[0185] The third lens element 1030 with positive refractive power has an external surface 1031 being concave in a paraxial region of the same and an internal surface 1032 being convex in a paraxial region of the same. The third lens element 1030 is made of a plastic material, and has the outer surface 1031 and the inner surface 1032, both of which are aspherical.
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76/94 [0186] The fourth lens element 1040 with negative refractive power has an external surface 1041 being convex in a paraxial region of the same and an internal surface 1042 being concave in a paraxial region of the same. The fourth lens element 1040 is made of a plastic material, and has the outer surface 1041 and the inner surface 1042, both of which are aspherical. In addition, each of the outer surface 1041 and the inner surface 1042 of the fourth lens element 1040 includes at least one critical point in a region outside its optical axis.
[0187] The 1050 filter is made of a glass material and is located between the fourth lens element 1040 and the inner mating surface 1060, and will not affect the focal length of the optical lens assembly.
[0188] The detailed optical data of ^the embodiment 10 are illustrated in Table 10, and aspherical surface data are illustrated in Table 20 below.
Table 19 - 10 Mode f = 2.36 mm, Fno = 1.80, HFOV = 43.4 degrees N- daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Conjugation surfaceexternal Plan InfinitO 1 LimiterinOpening Plan -0.156 2 Lens 1 1,350 ASP 0.542 Plas-tico 1,584 28.2 3.32 3 3,785 ASP 0.328 4 Lens 2 -16,605 ASP 0.278 Plas-tico 1,656 21.3 13.10 5 -5,700 ASP 0.249
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6 Lens 3 -1,013 ASP 0.380 Plas-tico 1,582 30.2 3.09 7 -0,738 ASP 0.182 8 Lens 4 1,467 ASP 0.418 Plas-tico 1,688 18.7 -3.11 9 0.769 ASP 0.500 10 Filter Plan 0.210 Glass 1,517 64.2 - 11 Plan 0.240 12 Conjugation surfaceinternal Plan - The reference wavelength is 587.6 nm (d-line). The effective radius of Surface 5 is 0.820 mm.
Table 2C - Coefficients Aspherical N- daSurface 2 3 4 5 k = -1.5044E + 00 1.0265E + 01 -9.0000E + 01 -3.2215E + 01 A4 = -1.3187E-01 3.4223E-02 -5.6092E-01 -1.7913E-01 A6 = 2.1246E + 00 -2.0348E + 00 2.1196E + 00 -9.4201E-01 A8 = -1.2215E + 01 1.0753E + 01 -1.7129E + 01 6.7388E + 00 A10 = 3.6256E + 01 -3.4036E + 01 6.8427E + 01 -2.7628E + 01 A12 = -5.4434E + 01 5.0385E + 01 -1.8863E + 02 5.4795E + 01 A14 = 3.2161E + 01 -2.5618E + 01 2.9953E + 02 -4.9509E + 01 A16 = -4.8799E + 00 -1.8799E + 02 1.7088E + 01 N- daSurface 6 7 8 9 k = 9.5516E-02 -5.5201E + 00 -6.7958E-01 -4.3677E + 00 A4 = 6.6544E-01 -1.2236E + 00 -6.3155E-01 -2.9848E-01 A6 = -3.3468E + 00 4.0302E + 00 5.2657E-01 2.8322E-01 A8 = 1.2778E + 01 -1.1278E + 01 -2.9289E-01 -1.8577E-01 A10 = -2.9710E + 01 1.9944E + 01 1.0103E-01 7.8158E-02 A12 = 4.5635E + 01 -1.8696E + 01 -1.9624E-02 -1.9985E-02 A14 = -3.9054E + 01 8.5520E + 00 1.8249E-03 2.7788E-03 A16 = 1.3730E + 01 -1.5038E + 00 -5.0883E-05 -1.5954E-04
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78/94 [0189] In ^the tenth embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. Moreover, the definitions of these parameters shown in the table below are the same as those stated in the first embodiment with ^the corresponding figures for ^the 10 embodiment, so an explanation in this regard will not be presented again.
[0190] Furthermore, these parameters can be calculated from Table 19 and Table 20 as the following values and satisfy the following conditions:
10 Modality f [mm] 2.36 CT2 / CT4 0.67 Fno 1.80 TD [mm] 2.38 HFOV [degrees] 43.4 TL / IH 1.47 Nd1 1,584 R1 / R2 0.36 Vd1 28.2 R2 / R7 2.58 Vd1 / Vd2 1.33 R2 / fd 1.60 Vd1 / Vd3 0.93 R8 / fd 0.33 Vd1 / Vd4 1.51 fd / fd3 0.76 Vd2 21.3 | fd / fd3 | + | fd / fd4 | 1.52 Vd3 30.2 max (| fd / fd3 |, | fd / fd4 |) 0.76 Vd4 18.7 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3| + | 1 / fd4 |) 0.59 EVd 98.4 SL / TL 0.95 CT1 / T12 1.65
<11 ^to Mode>
[0191] Fig. 21 is a schematic view of an electronic device according to the eleventh embodiment of the present disclosure. Fig. 22 shows spherical aberration curves, astigmatic field curves and a
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79/94 distortion curve of the electronic device according to the eleventh modality. In Fig. 21, the electronic device includes an optical lens assembly (its reference numeral is omitted), in which the optical lens assembly includes, in the order from the outside to the inside, an aperture limiter 1100, a first lens 1110, a second lens element 1120, a third lens element 1130, a fourth lens element 1140, a filter 1150 and an inner mating surface 1160. The optical lens assembly includes four lens elements (1110, 1120, 1130 and 1140) without one or more additional lens elements inserted between the first lens element 1110 and the fourth lens element 1140.
[0192] The first lens element 1110 with positive refractive power has an external surface 1111 being convex in a paraxial region of the same and an internal surface 1112 being concave in a paraxial region of the same. The first lens element 1110 is made of a plastic material, and has the outer surface 1111 and the inner surface 1112, both of which are aspherical.
[0193] The second lens element 1120 with positive refractive power has an external surface 1121 being concave in a paraxial region of the same and an internal surface 1122 being convex in a paraxial region of the same. The second lens element 1120 is made of a plastic material, and has the outer surface 1121 and the inner surface 1122, both of which are aspherical.
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80/94 [0194] The third lens element 1130 with positive refractive power has an external surface 1131 being concave in a paraxial region of the same and an internal surface 1132 being convex in a paraxial region of the same. The third lens element 1130 is made of a plastic material, and has the outer surface 1131 and the inner surface 1132, both of which are aspherical.
[0195] The fourth lens element 1140 with negative refractive power has an external surface 1141 being convex in a paraxial region of the same and an internal surface 1142 being concave in a paraxial region of the same. The fourth lens element 1140 is made of a plastic material, and has the outer surface 1141 and the inner surface 1142, both of which are aspherical. In addition, each of the outer surface 1141 and the inner surface 1142 of the fourth lens element 1140 includes at least one critical point in a region outside its optical axis.
[0196] The 1150 filter is made of a glass material and is located between the fourth lens element 1140 and the inner mating surface 1160, and will not affect the focal length of the optical lens assembly.
[0197] The detailed optical data of the 11th embodiment are shown in Tables 21A and 21B, and the aspheric surface data are illustrated in Table 22 below.
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Table 21A - 11- Modality f = 2.41 mm, Fno = 1.53, HFOV = 42.5 degrees Surface N Curvature Radius Specialsura Kill-rial Index N Abbe Comp.Focal 0 Conjugation surfaceexternal Plan 600,000 1 LimiterinOpening Plan -0.257 2 Lens 1 1,317 ASP 0.513 Plas-tico 1,634 20.4 3.48 3 2,778 ASP 0.362 4 Lens 2 -28,731 ASP 0.299 Plas-tico 1,634 20.4 11.77 5 -5,946 ASP 0.243 6 Lens 3 -1,020 ASP 0.487 Plas-tico 1,634 20.4 3.05 7 -0,791 ASP 0.030 8 Lens 4 1,381 ASP 0.405 Plas-tico 1,634 20.4 -4.42 9 0.820 ASP 0.500 10 Filter Plan 0.300 Glass 1,508 64.2 - 11 Plan 0.350 12 Surface andinternal conjugation Plan - The reference wavelength is 940.0 nm. The effective radius of Surface 5 is 0.820 mm.
Table 21B - 11 ^to mode fd = 2.31 mm N daSuper-surface Index Focal Length 0 External conjugation surface 1 Aperture Limiter 2 Lens 1 1,660 3.33 3 4 Lens 2 1,660 11.30
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5 6 Lens 3 1,660 2.90 7 8 Lens 4 1,660 -4.29 9 10 Filter 1,517 - 11 12 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 22 - Coefficients Aspherical N- daSurface 2 3 4 5 k = -1.0753E + 00 9.7802E + 00 6.3171E + 01 3.7325E + 00 A4 = 5.4959E-02 -3.9630E-02 -3.6536E-01 -1.9598E-01 A6 = 1.0492E-01 -4.5565E-01 5.7047E-01 -5.6492E-01 A8 = -1.9484E-01 1.0801E + 00 -7.7681E + 00 1.0803E + 00 A10 = -2.6211E-01 -1.3355E + 00 3.6161E + 01 -2.0683E + 00 A12 = 1.2488E + 00 -4.6404E + 00 -1.0187E + 02 2.6479E + 00 A14 = -1.1864E + 00 1.1437E + 01 1.4684E + 02 5.8189E-01 A16 = -7.6701E + 00 -7.9522E + 01 -1.2110E + 00 N- daSurface 6 7 8 9 k = 1.1229E-01 -6.3936E + 00 -7.0024E-01 -5.1268E + 00 A4 = 3.3200E-01 -1.0902E + 00 -5.8244E-01 -2.4265E-01 A6 = -1.0344E + 00 3.3258E + 00 5.5162E-01 2.1541E-01 A8 = 7.8602E-01 -8.3756E + 00 -3.7434E-01 -1.4747E-01 A10 = 3.5442E + 00 1.3896E + 01 1.6127E-01 6.6425E-02 A12 = -3.5166E + 00 -1.2822E + 01 -4.1668E-02 -1.9002E-02 A14 = -2.0857E + 00 6.0361E + 00 5.9602E-03 3.0844E-03 A16 = 2.6553E + 00 -1.1414E + 00 -3.6815E-04 -2.1130E-04
[0198] In ^the 11th embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. In addition, the definitions of these parameters illustrated in
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83/94 the following table are the same as those stated in 1modalidade with corresponding values for 11 mode, so an explanation in this regard will not be displayed again.
[0199] Furthermore, these parameters can be calculated from Table 21A, Table 21B and Table 22 as the following values and satisfy the following conditions:
11 Modality f [mm] 2.41 CT2 / CT4 0.74 Fno 1.53 TD [mm] 2.34 HFOV [degrees] 42.5 TL / IH 1.54 Nd1 1,660 R1 / R2 0.47 Vd1 20.4 R2 / R7 2.01 Vd1 / Vd2 1.00 R2 / fd 1.20 Vd1 / Vd3 1.00 R8 / fd 0.36 Vd1 / Vd4 1.00 fd / fd3 0.80 Vd2 20.4 | fd / fd3 | + | fd / fd4 | 1.33 Vd3 20.4 max (| fd / fd3 |, | fd / fd4 |) 0.80 Vd4 20.4 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3| + | 1 / fd4 |) 0.67 LVd 81.6 SL / TL 0.93 CT1 / T12 1.42
<12 ^to Modality>
[0200] Fig. 23 is a schematic view of an electronic device according to the twelfth embodiment of the present disclosure. Fig. 24 shows spherical aberration curves, astigmatic field curves and an electronic device distortion curve according to the twelfth modality. In Fig. 23, the electronic device includes an optical lens assembly (its numeral
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Reference 84/94 is omitted), where the optical lens assembly includes, in order from the outside to the inside, a first lens element 1210, an aperture stop 1200, a second lens element 1220, a third lens element lens 1230, a fourth lens element 1240, and an inner mating surface 1260. The optical lens assembly includes four lens elements (1210, 1220, 1230 and
1240) without one or more elements of lens additional inserted between O first element of lens 1210 and the bedroom element in 1240 lens.
[0201] The first lens element 1210 with negative refractive power has an external surface 1211 being convex in a paraxial region of the same and an internal surface 1212 being concave in a paraxial region of the same. The first lens element 1210 is made of a plastic material, and has the outer surface 1211 and the inner surface 1212, both of which are aspherical.
[0202] The second lens element 1220 with positive refractive power has an external surface 1221 being concave in a paraxial region of the same and an internal surface 1222 being convex in a paraxial region of the same. The second lens element 1220 is made of a plastic material, and has the outer surface 1221 and the inner surface 1222, both of which are aspherical.
[0203] The third lens element 1230 with negative refractive power has an outer surface 1231 being concave in a paraxial region of the same and an inner surface 1232 being convex in a region
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Paraxial 85/94 of the same. The third lens element 1230 is made of a plastic material, and has the outer surface 1231 and the inner surface 1232, both of which are aspherical.
[0204] The fourth lens element 1240 with positive refractive power has an external surface 1241 being convex in a paraxial region of the same and an internal surface 1242 being convex in a paraxial region of the same. The fourth lens element 1240 is made of a plastic material, and has the outer surface 1241 and the inner surface 1242, both of which are aspherical. In addition, the inner surface 1242 of the fourth lens element 1240 includes at least one critical point in a region outside its central axis.
[0205] The detailed embodiment of ^the optical data 12 are illustrated in Tables 23A and 23B, and the aspheric surface data are illustrated in Table 24 below.
Table 23A - 12 Modality f = 1.03 mm, Fno = 1.50, HFOV = 42.5 degrees N- daSuper-surface Radius ofCurvature Specialsura Kill-rial Index N Abbe Comp.Focal 0 Conjugation surfaceexternal Plan 600,000 1 Lens 1 1,422 ASP 0.846 Plas-tico 1,618 22.5 -5.27 2 0.765 ASP 0.222 3 LimiterinOpening Plan 0.049 4 Lens 2 -7,695 ASP 0.560 Plas-tico 1,618 22.5 0.78 5 -0,466 ASP 0.135
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86/94
6 Lens 3 -0.271 ASP 0.353 Plas-tico 1,634 20.4 -0.90 7 -0,776 ASP 0.030 8 Lens 4 0.510 ASP 0.759 Plas-tico 1,535 56.0 0.93 9 -8,998 ASP 0.535 10 Conjugation surfaceinternal Plan - The reference wavelength is 940.0 nm.
Table 23B - 12 Modality fd = 1.01 mm Surface Nand Index Focal Length 0 External conjugation surface 1 Lens 1 1,642 -5.19 2 3 Aperture Limiter 4 Lens 2 1,642 0.75 5 6 Lens 3 1,660 -0.87 7 8 Lens 4 1,544 0.91 9 10 Internal conjugation surface The reference wavelength is 587.6 nm (d-line).
Table 24 - Coefficients Aspherical N- daSurface 1 2 4 5 k = -7.4869E + 00 -4.7587E-01 9.9000E + 01 -7.4153E-01 A4 = 4.2236E-01 5.9226E-01 -1.4291E + 00 1.6574E + 00 A6 = -2.7562E-01 4.2114E + 00 1.4924E + 01 -1.1222E + 01 A8 = 2.5050E-01 -2.3869E + 01 -2.7186E + 02 4.5152E + 01 A10 = 1.1921E + 03 -7.4246E + 01
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87/94
A12 = -1.0727E + 02 A14 = 3.4937E + 02 N- daSurface 6 7 8 9 k = -2.5394E + 00 -4.5848E-01 -5.3201E + 00 3.5645E + 01 A4 = 4.5493E-01 -2.2310E-01 5.9458E-01 6.1050E-01 A6 = -1.7076E + 01 5.2812E-01 -2.3503E + 00 -1.1581E + 00 A8 = 1.0074E + 02 -1.0538E + 01 3.6851E + 00 -2.1566E + 00 A10 = -2.4822E + 02 4.2676E + 01 -2.6567E + 00 9.2076E + 00 A12 = 3.0275E + 02 -6.4731E + 01 7.2622E-01 -1.1452E + 01 A14 = -1.5186E + 02 3.6523E + 01 6.2329E + 00 A16 = -1.2626E + 00
[0206] In ^the 12th embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of ^the first embodiment. Moreover, the definitions of these parameters shown in the table below are the same as those stated in ^the embodiment 1 with corresponding values for the 12th embodiment, so an explanation in this regard will not be presented again.
[0207] Furthermore, these parameters can be calculated from Table 23A, Table 23B and Table 24 as the following values and satisfy the following conditions:
12 Modality f [mm] 1.03 CT2 / CT4 0.74 Fno 1.50 TD [mm] 2.95 HFOV [degrees] 42.5 TL / IH 3.49 Nd1 1,642 R1 / R2 1.86 Vd1 22.5 R2 / R7 1.50 Vd1 / Vd2 1.00 R2 / fd 0.75
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88/94
Vd1 / Vd3 1.10 R8 / fd -8.87 Vd1 / Vd4 0.40 fd / fd3 -1.16 Vd2 22.5 | fd / fd3 | + | fd / fd4 | 2.27 Vd3 20.4 max (| fd / fd3 |, | fd / fd4 |) 1.16 Vd4 56.0 (| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 | +| 1 / fd4 |) 0.68 LVd 121.4 SL / TL 0.69 CT1 / T12 3.12
<13 ^to Mode>
[0208] Fig. 6A 2 is a schematic view of a sensing module 1300 of an electronic device 10 according to the 13th embodiment of the present disclosure. Fig. 26B is a schematic view of an appearance on one side of the electronic device 10 according to ^the embodiment of the present disclosure. Fig. 26C is a schematic view of an appearance on the other side of the electronic device 10 according to ^the embodiment of the present disclosure. In Figs. 26A, 26B and 26C, the electronic device 10 according to the 13th embodiment is a tablet that includes the sensing module 1300, an image capture equipment 11 and a display device 12.
[0209] The 1300 sensing module includes 1310 projection equipment, 1320 receiving equipment and 1330 processor, where 1310 projection equipment and 1320 receiving equipment are connected to 1330 processor. 1310 projection equipment includes the set of optical lens (its numeral is omitted referênica) 12 according to ^the embodiment mentioned above and at least one light source 1311, in which
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89/94 the optical lens assembly includes, in order from the outside to the inside (that is, from the magnifying side to the reducing side of the projection equipment 1310), the first lens element 1210, the aperture limiter 1200, the second lens element 1220, the third lens element 1230, the fourth lens element 1240 and the inner mating surface 1260, and the light source 1311 can be composed of a laser array, and can be a laser emitting vertical cavity surface, which is arranged on the inner connecting surface 1260 of the optical lens assembly. The apparatus reepção 1320 includes a set of optical lens (its reference numeral is omitted) according to the 11th embodiment and an image sensor 1321, in which the optical lens assembly includes, in order from outside to inside ( (ie from the object side to the image side of the receiving equipment 1320), the aperture limiter 1100, the first lens element 1110, the second lens element 1120, the third lens element 1130, the fourth lens element lens 1140, filter 1150 and inner mating surface 1160, and image sensor 1321 is arranged on inner mating surface 1160 of the optical lens assembly.
[0210] The light from the 1311 light source of the projection equipment 1310 passes through the optical lens assembly of the same in order to form in a structured light and project on a sensed object 13a. The receiving equipment 1320 receives the reflective light from the sensed object 13a, images on the image sensor 1321, and the information received can be calculated by the 1330 processor in order to obtain the relative distance
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90/94 of each part of the sensed object 13a, additionally obtaining the variation with 3D format on the surface of the sensed object 13a.
[0211] In the thirteenth mode, the projection device 1310 and reception device 1320 (including sets of optical lens, the light source 1311 , and the image sensor 1321) may be applied to the infrared range (780 nm at 1500 nm) in order to reduce interference by visible light and improve the accuracy of sensing. In ^the 13th embodiment, the projection device 1310 and reception device 1320 can further be applied to narrow band infravemelho (930 nm - 950 nm) so as to reduce noise interference.
[0212] Image capture equipment 11 includes the optical lens assembly (its reference number is omitted) according to 10 ^the aforementioned modality and an image sensor (its reference number is omitted) disposed on the conjugation surface internal 1060, where the image capture equipment 11 can be applied to visible light (400 nm - 700 nm).
[0213] The sensed object 13a can include the surrounding environment, the sensing module 1300 can be correlated with image capture equipment 11 and display equipment 12 in order to apply, without being restricted, to the augmented reality function, so that users can interact with the surrounding environment.
[0214] Further, in ^the 13th embodiment, the projection device 1310 includes the lens assembly
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Optical 91/94 12 according to ^the above embodiment and the reception device 1320 includes the optical lens assembly 11 according to ^the above embodiment, but the present disclosure will not be limited thereto. The projection equipment 1310 and the receiving equipment 1320 may include another optical lens assembly, just as the 1310 projection equipment may include another optical lens assembly, just as the 1310 projection equipment may include the optical lens assembly according to 3 with ^{the above-mentioned} embodiment, and the receiving equipment 1320 may include the optical lens set according to ^the above second embodiment, and will not be described in detail here.
<14 ^to Mode>
[0215] Fig. 27A is a schematic view of an appearance of the state of use of an electronic device 20 according to ^the embodiment of the present disclosure. Fig. 27B is a schematic view of a sensing module 1400 of the electronic device 20 according to ^the embodiment of the present disclosure. According to the 14th embodiment, the electronic device 20 is a smart phone that includes the sensing module 1400, an image capture device 21:01 display device 22.
[0216] The sensing module 1400 includes a projection equipment 1410, a receiving equipment 1420 and a processor 1430, where the projection equipment 1410 and equipment connected to the processor 1430.
1420 receiving equipment According to the modality, the 1410 projection equipment includes
14 ^to one
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92/94 optical lens assembly 1411 and a light source 1412, the receiving equipment 1420 includes an optical lens assembly 1421 and an image sensor 1422, in which the connection relationship and functions of the projection equipment 1410, the reception device 1420 and the processor 1430 can be the same as those of the projection device 1310, the receiving device 1320 and the processor 1330 declared in ^the embodiment 13 and will not be described here again.
[0217] The sensing module 1400 can be applied to the facial recognition function, Fig. 27B, the light source 1412 can be composed of an array of lasers 1412a, which can form light structure with the optical lens assembly 1411 of the projection equipment 1410, and projecting onto a sensed object 14a, wherein the sensed object 14a is illustrated without a projection matrix image, and the sensed object 14b is illustrated with a projection matrix image. The optical lens assembly 1421 of the receiving equipment 1420 receives the reflective light from the sensed object 14b, forms images on the image sensor 1422, and the received image 1422a can be calculated by the processor 1430 in order to obtain the relative distance of each part of the sensed object 14b, additionally obtaining the variation with 3D format on the surface of the sensed object 14b. Therefore, the safety of the electronic device 20 during use can be improved, but is not limited to this. The image capture equipment 21 can be used for photography, and can be correlated to the sensing module 1400, in which the information obtained from the receiving equipment 1420 and
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93/94 of the image capture equipment 21 can be illustrated on the display equipment 22 after processing.
<15 ^to Mode>
[0218] Fig. 28 is a schematic view of an electronic device 30 according to ^the embodiment of the present disclosure. In ^the 15th embodiment, the electronic device 30 includes a sensing module (its reference numeral is omitted) of an image capture device 31 and a display device 32.
[0219] The module of sensing includes one equipment in projection 1520, one equipment receiving 1530 and one processor 1520 in that the equipment in projection 1510 and the equipment reception 1530 are connected to 1430 processor. According with the 15 ^to modality, The relationship connection and functions of equipment in projection 1510, the equipment receiving 1520 and the processor 1530 can be the same as O equipment in projection 1310, the equipment receiving
1320 and processor 1330 declared in ^the 13th embodiment, and will not be described here again.
[0220] According to ^the fifteenth embodiment, the sensing module may be used to capture the dynamic range of the sensed object 33 in order to implement the human-computer interaction, but is not limited to this. The image capture equipment 31 can be used for photography, and can be correlated to the sensing module, in which the information obtained from the receiving equipment 1520 and the image capture equipment 31 can be illustrated on the display equipment 32 after the processing.
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94/94 [0221] The preceding description, for the purpose of explanation, has been described with reference to specific modalities. It should be noted that the Tables show different data from different modalities; however, the data for the different modalities are obtained from experiments. The described modalities were chosen and described in order to better explain the principles of the disclosure invention and its practical applications, thus allowing others skilled in the art to make the best use of the disclosure and various modalities with modifications, as appropriate to the specific use contemplated. The modalities represented above and the accompanying drawings are illustrative and are not intended to be exhaustive or to limit the scope of the present disclosure to the exact forms disclosed. Many modifications and variations are possible in light of the above teachings.

权利要求:
Claims (31)
[1]
1. Electronic device, comprising at least one optical lens assembly, which comprises four lens elements, the four lens elements being in order from the outside to the inside:
a first lens element having an outer surface being convex in a paraxial region thereof;
a second lens element having an inner surface being convex in a paraxial region thereof;
a third lens element; and a fourth lens element having an inner surface being concave in a paraxial region thereof, wherein at least one of an outer surface and the inner surface of the fourth lens element comprises at least one critical point in a region outside the optical axis. of the same;
Characterized by when a measurement is made according to a reference wavelength as a line d, an Abbe number of the first lens element is Vd1, an Abbe number of the second lens element is Vd2, an Abbe number of the third lens element lens is Vd3, an Abbe number of the fourth lens element is Vd4, a focal length of the optical lens assembly is fd, a focal length of the third lens element is fd3, and a focal length of the fourth lens element is fd4, as following conditions are met:
65 < Vd1 / Vd2 < 1.54; 65 < Vd1 / Vd3 < 1.54; 65 < Vd1 / Vd4 < 1.54;
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[2]
12/2
10.0 <Vd1 <38.0; and
0.69 <| fd / fd3 | + | fd / fd4 |.
2. Electronic device according to claim 1, characterized in that when the measurement is made according to the reference wavelength as line d, the Abbe number of the first lens element is Vd1, and the following condition is met :
12.0 <Vd1 <34.0.
[3]
3. Electronic device according to claim 1, characterized in that when the measurement is made according to the reference wavelength such as line d, a sum of the Abbe numbers of the first lens element, the second lens element, the third lens element and the fourth lens element is EVd, and the following condition is met:
40.0 <Ódd <155.0.
[4]
4. Electronic device according to claim 3, characterized in that when the measurement is made according to the reference wavelength such as line d, the sum of the Abbe numbers of the first lens element, the second lens element, the third lens element and the fourth lens element is EVd, and the following condition is met:
45.0 <EVd <125.0.
[5]
5. Electronic device according to claim 1, characterized in that a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, and the following condition is met:
0 <CT2 / CT4 <1.04.
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12/3
[6]
Electronic device according to claim 1, characterized in that the radius of curvature of the outer surface of the first lens element is R1, the radius of curvature of the inner surface of the first lens element is R2, and the following condition is satisfied:
0.32 <R1 / R2 <1.64.
[7]
Electronic device according to claim 1, characterized in that a radius of curvature of an inner surface of the first lens element is R2, a radius of curvature of the outer surface of the fourth lens element is R7, and the following condition is satisfied:
0.25 <R2 / R7 <4.8.
[8]
8. Electronic device according to claim 1, characterized in that when the measurement is made according to the reference wavelength such as line d, the focal length of the optical lens assembly is fd, the focal length of the third element lens length is fd3, the focal length of the fourth lens element is fd4, the maximum of the two values of | fd / fd3 | e | fd / fd4 | is max (| fd / fd3 |, | fd / fd4 |), and the following condition is met:
0.43 <max (| fd / fd3 |, | fd / fd4 |) <2.7.
[9]
9. Electronic device according to claim 1. characterized in that when the measurement is made according to the reference wavelength such as line d, a focal length of the first lens element is fd1, a focal length of the second element lens length is fd2, the focal length of the third lens element is
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4/12 fd3, the focal length of the fourth lens element is fd4, and the following condition is met:
0.38 <(| 1 / fd1 | + | 1 / fd2 |) / (| 1 / fd3 | + | 1 / fd4 |) <1.5.
[10]
10. Electronic device according to claim 1, characterized in that an optical lens assembly f number is Fno, a half of a maximum field of view of the optical lens assembly is HFOV, an axial distance between an external surface of a of the lens elements closest to the outside and an inner surface of one of the lens elements closest to the inside is TD, an axial distance between the outer surface of the first lens element and an inner connecting surface of the optical lens assembly is TL , a maximum radius of an effective optical region of the internal conjugating surface of the optical lens assembly is IH, and the following conditions are met:
1.0 <Fno <2.3;
5 degrees <HFOV <50 degrees;
1 mm <TD <5 mm; and
1.0 <TL / IH <4.0.
[11]
11. Electronic device according to claim 1, characterized in that the first lens element has positive refractive power, and the second lens element has positive refractive power.
[12]
12. Electronic device according to claim 11, characterized in that one of the third lens element and the fourth lens element have positive refractive power, and the other one has negative refractive power, and the internal surface of the room
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5/12 lens element comprises at least one critical point in a region outside the optical axis thereof.
[13]
13. Electronic device, according to claim 1, characterized in that the first lens element has an internal surface being concave in a paraxial region of the same;
where a radius of curvature of the inner surface of the first lens element is R2, when the measurement is made according to the reference wavelength as line d, the focal length of the optical lens assembly is fd, and the next condition is satisfied:
0 <R2 / fd <2.0.
[14]
14. Electronic device, according to claim 1, characterized in that the second lens element has an external surface being concave in a paraxial region of the same;
wherein a central thickness of the first lens element is CT1, an axial distance between the first lens element and the second lens element is T12, and the following condition is met:
0.80 <CT1 / T12 <3.5.
[15]
15. Electronic device, according to claim 1, characterized in that the third lens element with positive refractive power has an internal surface being concave in a paraxial region of the same;
where when the measurement is made according to the reference wavelength as line d, the focal length of the optical lens assembly is fd, the focal length of the third lens element is fd3, and the following condition is met:
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6/12
0 <fd / fd3 <1.1.
[16]
16. Electronic device, according to claim 1, characterized in that the third lens element has an external surface being concave in a paraxial region of the same.
[17]
17. Electronic device according to claim 1, characterized in that the external surface of the fourth lens element is convex in a paraxial region of the same and comprises at least one critical point in a region outside its optical axis.
[18]
18. Electronic device according to claim 1, characterized by one of an outer surface and the inner surface of each of the first lens element, the second lens element, the third lens element and the fourth lens element be concave in a paraxial region of the same, and the other be convex in a paraxial region of the same.
[19]
19. Electronic device according to claim 1, characterized in that the optical lens assembly additionally comprises an aperture limiter disposed outside the second lens element;
wherein an axial distance between the aperture limiter and the inner connecting surface of the optical lens assembly is SL, an axial distance between the outer surface of the first lens element and the
surface of internal conjugation of set in lens optics is TL, and the following condition is satisfied: 0.70 <SL / TL <1.1. 20. Electronics Industry, according with the claim 1, characterized by O set in lens
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7/12 optics be applied to an infrared range within a wavelength ranging from 780 nm to 1500 nm.
[20]
21. Electronic device according to claim 1, characterized by additionally comprising:
a projection equipment comprising the optical lens assembly and at least one light source, wherein the light source is arranged on an internal connecting surface of the optical lens assembly.
[21]
22. Electronic device according to claim 1, characterized by additionally comprising:
a receiving equipment comprising the optical lens assembly and an image sensor, wherein the image sensor is disposed on an internal connecting surface of the optical lens assembly.
[22]
23. Electronic device according to claim 1, characterized in that the number of optical lens assemblies is at least two, and the electronic device additionally comprises:
a sensing module comprising: a projection equipment comprising one of the optical lens assemblies and at least one light source, wherein the light source is arranged on an internal connecting surface of the optical lens assembly;
a receiving equipment comprising another one of the optical lens assemblies and an image sensor, wherein the image sensor is arranged on an internal conjugating surface of the optical lens assembly;
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8/12 in which the light source of the projection equipment is projected onto a sensed object and is received by the receiving equipment after reflection, and is represented as an image on the image sensor.
[23]
24. Electronic device, comprising at least one optical lens assembly, which comprises four lens elements, the four lens elements being in order from the outside to the inside:
a first lens element;
a second lens element having a surface
external being concave in a region paraxial of same and an inner surface being convex in a region paraxial gives same; one third element of lens by having an outer surface being concave in a region paraxial gives
same; and a fourth lens element having an outer surface being convex in a paraxial region thereof and an inner surface being concave in a paraxial region thereof, wherein the outer surface of the fourth lens element comprises at least one critical point in a region outside its optical axis;
Characterized by at least one of the third lens element and the fourth lens element having positive refractive power, and the other having negative refractive power;
where, when a measurement is made according to a reference wavelength as a d line, an Abbe number of the first lens element is Vd1, an Abbe number of the second lens element is Vd2, an Abbe number of the
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9/12 third lens element is Vd3, an Abbe number of the fourth lens element is Vd4, a focal length of the optical lens assembly is fd, a focal length of the third lens element is fd3, and a focal length of the fourth element lens is fd4, the following conditions are met:
0.65 < Vd1 / Vd2 < 1.54; 0.65 < Vd1 / Vd3 < 1.54; 0.65 < Vd1 / Vd4 < 1.54; and 0.69 < | fd / fd3 l + l fd / fd4l <2.65
[24]
25. Electronic device according to claim 24, characterized in that when the measurement is made according to the reference wavelength such as line d, a sum of the Abbe numbers of the first lens element, the second lens element, the third lens element and the fourth lens element is EVd, and the following condition is met:
40.0 <Ódd <155.0.
[25]
26. Electronic device according to claim 24, characterized in that the radius of curvature of the inner surface of the fourth lens element is R8, when the measurement is made according to the reference wavelength such as line d, the length focal length of the optical lens assembly is fd, and the following condition is met:
0 <R8 / fd <1.75.
[26]
27. Electronic device according to claim 24, characterized in that when the measurement is made according to the reference wavelength such as line d, the focal length of the lens assembly
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10/12 optical is fd, the focal length of the third lens element is fd3, the focal length of the fourth lens element is fd4, the maximum of the two values of | fd / fd3 | e | fd / fd4 | is max (| fd / fd3 |, | fd / fd4 |), and the following condition is met:
0.53 <max (| fd / fd3 |, | fd / fd4 |) <1.8.
[27]
28. Electronic device, comprising a sensing module, which comprises:
a projection equipment comprising an optical lens assembly and at least one light source, characterized in that the optical lens assembly comprises four to six lens elements, and the light source is arranged on an internal connecting surface of the assembly of optical lens; and a receiving equipment comprising an optical lens assembly and an image sensor, wherein the optical lens assembly comprises four to six lens elements, and the image sensor is disposed on an internal conjugating surface of the lens assembly optics;
where the light source of the projection equipment is projected onto a sensed object and is received by the receiving equipment after reflection, and is represented as an image on the image sensor;
wherein, when a measurement is made according to a reference wavelength as a d-line, at least six lens elements of the lens elements of the optical lens assembly of the projection equipment and the lens elements of the lens assembly optics
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11/12 receiving equipment has Abbe numbers below 3 8;
where, in the optical lens assembly of each of the projection equipment and the receiving equipment, an axial distance between an outer surface of one of the lens elements closest to the outside and an inner surface of one of the most lens elements near the interior is TD, and the following condition is met:
1 mm <TD <5 mm.
[28]
29. Electronic device according to claim 28, characterized in that both the projection equipment and the receiving equipment are applied to an infrared range within a wavelength ranging from 780 nm to 1500 nm.
[29]
30. Electronic device according to claim 28, characterized in that when the measurement is made according to the reference wavelength as line d, at least seven lens elements of the lens elements of the optical lens assembly of the equipment of projection and the lens elements of the optical lens assembly of the receiving equipment have Abbe numbers less than 38.
[30]
Electronic device according to claim 28, characterized in that the optical lens assembly of the projection equipment comprises four of the lens elements, and the optical lens assembly of the receiving equipment comprises four of the lens elements.
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12/12
[31]
32. An electronic device according to claim 28, characterized in that at least six of the lens elements of the optical lens assembly of the projection equipment and the lens elements of the optical lens assembly of the receiving equipment are made of plastic materials , and at least one of the optical lens assembly of the projection equipment and of the optical lens assembly of the receiving equipment, at least one of an outer surface and an inner surface of one of the lens elements closest to the interior of the assembly. optical lens comprises at least one critical point in a region outside the optical axis of it.

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TW201409070A|2014-03-01|Optical photographing lens assembly, image capturing device and electronic mobile terminal

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TWI657259B|2019-04-21|Lens system, projection device, detecting module and electronic device

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TW201520903A|2015-06-01|Image capturing array system and fingerprint identification device

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JP2014182380A|2014-09-29|Optical imaging lens of portable device

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US20200081228A1|2020-03-12|Electronic device

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CN111221101B|2021-11-26|Lens system, projection device, sensing module and electronic device

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KR20170066005A|2017-06-14|Image pickup lens, camera module and digital device including the same

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US20190170972A1|2019-06-06|Projection lens assembly

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KR20150089135A|2015-08-05|Image pickup lens

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CN109581623B|2022-03-15|Electronic device

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US10768394B2|2020-09-08|Electronic device

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TWI669551B|2019-08-21|Optical imaging lens

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KR20150087511A|2015-07-30|Image pickup lens

同族专利:

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公开号 | 公开日

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US20220003961A1|2022-01-06|

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US20200218033A1|2020-07-09|

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US11150441B2|2021-10-19|

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US10634873B2|2020-04-28|

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KR102080544B1|2020-04-24|

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US20190101724A1|2019-04-04|

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TWI634360B|2018-09-01|

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KR20190038373A|2019-04-08|

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TW201915537A|2019-04-16|

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CN109581623A|2019-04-05|

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法律状态:
2019-04-16| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US201762565173P| true| 2017-09-29|2017-09-29|

---

US62/565,173|2017-09-29|

---

US15/869,314|2018-01-12|

---

US15/869,314|US10634873B2|2017-09-29|2018-01-12|Electronic device|

---