• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a variable optical power lens (100), characterized in that it comprises: - a flexible transparent blade (150); - a body (110) having a ridge (115) inscribed in a cylindrical surface; an element (160) capable of displacing a first portion of the blade (150), distinct from a second portion of the blade (150) in contact with the edge (115), so as to deform the blade (150) by flexion; a liquid (190) contained between the blade (150) and the body (110). An optical assembly comprising such a lens and a visual compensation device comprising such an optical assembly are also provided.
    公开号:FR3039901A1
    申请号:FR1557532
    申请日:2015-08-04
    公开日:2017-02-10
    发明作者:Stephane Boutinon；Michel Nauche
    申请人:Essilor International Compagnie Generale dOptique SA；
    IPC主号:
    专利说明:

    Technical field to which the invention relates
    The present invention relates to the field of optics.
    It relates more particularly to a variable optical power lens, an optical assembly comprising such a lens and a visual compensation device comprising such an optical assembly.
    Technological background
    It is known, for example from document ER 2,034,338, a lens of variable power comprising a chamber delimited in part by an elastic membrane and filled with a fluid.
    It is proposed in this document to vary the volume of the chamber (by displacement of mechanical elements) in order to modify the fluid pressure and thus deform the membrane.
    This solution thus rests on an elastic deformation of the membrane by stretching, which makes it possible to give it a spherical shape, and is therefore well suited when it is desired to vary the spherical power of the lens along a given optical axis. . Obtaining an astigmatism is however more complex in such a system since it requires for example the use of a membrane made of a non-homogeneous material and / or anisotropic.
    Object of the invention
    In this context, the present invention provides a variable optical power lens, characterized in that it comprises a flexible transparent blade, a body having an edge inscribed in a cylindrical surface, an element able to move a first portion of the blade, distinct from a second part of the blade in contact with the edge, so as to deform the blade by bending and a liquid contained between the blade and the body.
    By moving said element, it is thus possible to deform the flexible blade (by unidirectional bending) so that it marries more or less the shape of the edge, which makes it possible to modify the refractive characteristics of the lens and to obtain the desired cylindrical optical power variation through the cylindrical shape of the edge.
    According to optional and therefore non-limiting characteristics: the element is a control part guided in translation in the body and arranged in abutment on said first part of the blade so as to press said second part of the blade on the edge; - A control ring rotatably mounted in the body cooperates with the control part by means of a screw-nut system; the blade is received inside a central opening of the body and comprises means preventing its rotation about an axis passing through the central opening (which corresponds for example to the optical axis of the lens); the ridge is formed by an end edge of a wall surrounding the central opening; the liquid is received between the blade and the body with insufficient pressure to cause (due to the single pressure) deformation (stretching) of the blade; the liquid is retained in a chamber formed by the blade and by a peripheral elastic membrane. The invention also provides an optical assembly comprising a first lens as mentioned above and a second spherical power lens variable along an optical axis.
    According to optional and therefore non-limiting characteristics: the spherical power is variable by displacement of a mechanical element of the second lens; the body of the first lens is rotatably mounted around the optical axis; a first drive system is adapted to move the element of the first lens, a second drive system is adapted to move the mechanical element of the second lens, and a third drive system is adapted to drive the body. in rotation around the optical axis; the third drive system is designed to move the optical assembly integrally with the body in rotation around the optical axis; the third drive system is adapted to drive the body independently of the element of the first lens and the mechanical element of the second lens; a control means of the first drive system and the second drive system is designed to drive the first drive system so as to maintain a given relative position between the body and the element of the first lens, and to drive the second drive system so as to maintain a given relative position between the body and the mechanical element of the second lens. The invention finally proposes a visual compensation device comprising an optical assembly such as has just been defined.
    Detailed description of an example of realization
    The following description with reference to the accompanying drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be achieved.
    In the accompanying drawings: - Figure 1 shows an optical assembly comprising a lens according to the invention; - Figure 2 shows a sectional view of the optical assembly of Figure 1; and FIG. 3 represents a cutaway perspective view of the optical assembly of FIG. 1.
    Figures 1 to 3 show an optical assembly comprising a first lens 100 and a second lens 200.
    The first lens 100 and the second lens 200 are here respectively made on either side of the same frame (or body) 110. An indeformable (transparent) separation plate 118, mounted on the common frame 110, defines chambers filled with liquid of the first lens 100 and the second lens 200, as explained below, and thus allows independent operation of the two lenses 100, 200.
    As a variant, one or the other of the two lenses 100, 200 could be made separately. Each lens 100, 200 is described separately below.
    As explained in the following, the first lens 100 is designed to generate, according to an optical axis X of the first lens, a variable cylindrical optical power.
    The second lens 200 is designed to generate, along its optical axis identical to the optical axis X of the first lens 100, a variable spherical optical power.
    The first lens 100 includes the frame (or body) 110 and a flexible transparent blade 150.
    The frame 110 has a central opening 120 closed at one end by a first (transparent) closure blade 130 and at the other end by the partition plate 118; the flexible transparent blade 150 is located in the central opening 120, between the first closing blade 130 and the separating plate 118.
    Two walls integrated in the frame 110 allow a guide of the flexible blade 150 for preventing rotation of the flexible blade 150 around the optical axis X.
    The frame 110 has an edge 115 which extends around the periphery of the central opening 120 and which is inscribed in a cylindrical surface whose axis is perpendicular and intersecting with the optical axis X.
    The frame 110 comprises for example for this purpose a wall 112 which surrounds the central opening 120 and whose free end edge defines the edge 115 above. The function of the edge 115 is to create an abutment serving as a starting point for the camber of the flexible blade 150 (bending), as explained below. The cylindrical shape of the edge 150 (that is to say the cylindrical surface in which the edge 115 is inscribed) therefore has a radius less than the radius corresponding to the maximum desired cylindrical power, typically of the order 40 mm or less.
    The first lens 100 also comprises a first control part 160 integral with the flexible blade 150
    The first control part 160 is here formed in the form of an annular control plate surrounding the central opening 120 and having, at each of two zones opposite to 180 °, an external thread.
    The first control part 160 is mounted in the frame 110 guided in translation along the optical axis X.
    The first lens 100 also comprises a first elastic membrane 170 of cylindrical shape and connecting the frame 110 and the first control part 160.
    The flexible blade 150, the first control part 160, the first elastic membrane 170, the intermediate plate 118 and the frame 110 form a chamber filled with a liquid 190. Here, this liquid 190 is identical to that used in the document US8000022. , namely silicone oil (for example of the type
    Rhodrosil Oil 47).
    The frame 110 has fluid passage openings 195 in the aforementioned wall 112 to facilitate the passage of liquid between the different parts of the chamber.
    The first elastic membrane 170 is designed to deform (especially by stretching) to compensate for volume variations in the liquid-filled chamber 190 caused by bending of the flexible blade 150, as described hereinafter. As clearly visible in FIGS. 2 and 3, the first elastic membrane 170 is located at the periphery of the frame 110 and therefore plays no optical role.
    The first cylindrical lens 100 finally comprises a first control ring 180, mobile only in rotation on a given angle around the optical axis X. The first control ring 180 has an internal thread (here of square section) centered on the X optical axis and which meshes with the external thread of the first control part 160.
    The first control ring 180 also has a plurality of teeth 185 around its entire periphery so as to form a toothed wheel and can thus be rotated by a first drive system (not shown), for example a motor whose the output shaft has a worm which cooperates with the teeth 185 of the first control ring 180.
    It is also possible to limit the stroke of the first control ring 180, for example by means of a stopper made between the frame 110 and the first control ring 180.
    We now describe the movements that allow flexion of the flexible blade 150 and thus obtaining a variable cylindrical optical power.
    It is considered for the disclosure that the first control part 160 is in its highest position (considering the orientation of FIG. 2), that is to say the closest to the first closure blade 130. as shown in FIGS. 2 and 3. As can be seen in these figures, in this position of the first control member 160, the flexible blade 150 is not in contact with the edge 115.
    When rotating the first control ring 180 (for example by means of the aforesaid first drive system), the first control part 160 moves in translation (downwards in FIG. 2) via the screw / nut system, a few degrees, until the flexible blade 150 comes into contact with the edge 115 of cylindrical form integral with the frame 110 (this contact being made firstly at the top 116 of the edge 115 in Figure 2, that is to say in the plane containing the optical axis X and the axis of the cylindrical surface containing the edge 115).
    By continuing the rotation of the first control ring 180, the assembly formed of the first control part 160 and the flexible blade 150 continues its translation (downwards in FIG. 2, that is to say in FIGS. away from the first closure blade 130) so that the flexible blade 150 enters progressive flexion, with a radius value (bending) directly related to the rotation angle of the first control ring 180.
    Due to the cylindrical edge, the flexible blade 150 will deform preferably in a cylindrical shape, which provides the desired cylindrical correction, which has a variable power according to the value of the aforementioned bending radius.
    Moreover, because the deformation of the flexible blade is initiated by the edge 150 inscribed in a cylindrical surface, the axis of this cylindrical correction corresponds to the axis of this cylindrical surface (ie a fixed axis relative to the frame 110 and perpendicular to the optical axis X).
    It will be noted that the flexible blade 150 generally also undergoes a second deformation of greater or lesser importance, in particular as a function of its anisotropy, of its stiffness in bending and of the pressure increase related to the deformation of the first elastic membrane 170. In fact, the flexible blade 150 does not generally have a purely cylindrical shape, but a toric shape.
    The additional spherical component may then possibly be compensated by other optical means, here by action on the second lens 200 described below.
    During the deformation of the flexible blade 150, the volume within the chamber filled with the liquid 190 remains constant. Indeed, the increase in pressure generated by the deformation of the flexible blade 150 causes the deformation of the first elastic membrane 170 so as to absorb the transfer of liquid 190 from the useful area.
    Note also that this slight pressurization (performed by the flexible blade 150) ensures reversibility of the movement, while ensuring a wedging of the game within the screw / nut system.
    In summary, by driving the first control ring 180 in rotation by means of the first drive system, the cylindrical power of the first lens 100 is varied as explained above (the axis of the cylindrical correction being on the other hand fixed relative to the frame 110 as explained above).
    The second lens 200 comprises a support having a central opening 220, a second elastic membrane 250 received in the central opening 220, a second control member 260 secured to the second elastic membrane 250 and a second control ring 280.
    The support of the second lens 200 is here secured to the frame 110 of the first lens 110, for example made in one piece with it.
    The second control part 260 is mounted guided in translation in the support, here by means of three guide columns.
    The second control ring 280 is mobile only in rotation around the optical axis X and makes it possible, during its rotational movements, to move the second control part 260 in translation along the optical axis X by means of a system screw / nut (formed for example of an internal thread of the second control ring 280 which cooperates with an external thread of the second control member 260).
    The second elastic membrane 250, the second control member 260, the separation plate 118 and the support (here the common housing 110) form a chamber filled with liquid so that the translational movement of the second control member 260 causes a elastic deformation (with stretching) of the second elastic membrane 250, which thus adopts a substantially spherical shape, with a radius of curvature depending on the position of the second control member 260.
    This gives the desired variable spherical power.
    The second control ring 280 carries over its entire periphery a plurality of teeth 285 so as to form a toothed wheel and can thus be driven in rotation by a second drive system (not shown), for example a motor whose output shaft has a worm which cooperates with the teeth 285 of the second control ring 280.
    Thus, by driving the second control ring 280 in rotation by means of the second drive system, the spherical power of the second lens 200 is varied as explained above. The whole of the kinematics is without any construction set. . Thanks to this characteristic, it is possible to establish a control law of the kinematics which is continuous. In fact, in the opposite case, since the direction of the forces exerted on the kinematics is reversed when the membrane passes from a convex shape to a concave shape, a construction game could distort the control law or complicate the control. development of this law of order.
    As described above, it is possible to vary the cylindrical power and the spherical power of the correction obtained by the optical assembly formed by the first lens 100 and the second lens 200 by respectively rotating the first control ring. 180 (for example by means of a first drive system) and the second control ring 280 (for example by means of a second drive system).
    In order to vary the cylinder axis of the cylindrical correction obtained by the first lens 100, the aforementioned optical assembly can be rotatably mounted around the optical axis X with respect to a fixed reference system (particularly with respect to the eye of the patient in front of which the optical assembly is placed in the context of a subjective refraction examination).
    For example, a third drive system designed to rotate the frame 110 around the optical axis X (with respect to the aforementioned fixed reference frame), for example by means of a set of teeth 111 provided on the wall, is provided. external of the frame 110, on the periphery of the optical assembly.
    According to this embodiment, the first drive system, the second drive system and the third drive system are mounted in the fixed frame and the rotation of frame 110 (caused by the third drive system) relative to to the fixed reference system causes a rotation of the frame on the one hand relative to the first control ring 180 and secondly with respect to the second control ring 280 (these two control rings 180, 280 being immobile in the fixed reference system in the absence of drive by the first and second drive systems).
    In this case, it is envisaged to control (simultaneously or not with the rotation of the frame 110) the first drive system and the second drive system so as to maintain the relative position of the frame 110, the first control ring 180, and the second control ring 280 to maintain the desired cylindrical power and spherical power values.
    Such a construction has the advantage of not having to embark the first drive system and the second drive system on a frame integral with the frame 110 and driven by the third drive system. The latter possibility is however also conceivable, in which case the third drive system is designed to move the optical assembly (including the first lens 100 and the second lens 200) integrally rotating body about the optical axis. The optical assembly which has just been described can be used in a visual compensation device that can be used, for example, for a subjective refraction examination.
    Such a visual compensation device comprises the optical assembly formed of the first lens 100 and the second lens 200, the first aforementioned drive system (arranged to rotate the first control ring 180), the second system said drive (arranged to rotate the second control ring 280) and the third drive system (designed to rotate the frame 110). The optical axis X of the optical assembly then corresponds to an observation axis according to which a person undergoing the subjective refraction examination can observe through the visual compensation device.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1. Variable optical power lens (100), characterized in that it comprises: - a flexible transparent blade (150); - a body (110) having a ridge (115) inscribed in a cylindrical surface; an element (160) capable of displacing a first portion of the blade (150), distinct from a second portion of the blade (150) in contact with the edge (115), so as to deform the blade (150) by flexion; a liquid (190) contained between the blade (150) and the body (110).
    [2" id="c-fr-0002]
    2. The lens of claim 1, wherein the element is a control part (160) guided in translation in the body (110) and disposed in abutment on said first portion of the blade (150) so as to press said second part of the blade (150) on the edge (115).
    [3" id="c-fr-0003]
    3. The lens of claim 2, wherein a control ring (180) rotatably mounted in the body (110) cooperates with the control part (160) by means of a screw-nut system.
    [4" id="c-fr-0004]
    4. The lens according to one of claims 1 to 4, wherein the blade (150) is received within a central opening (120) of the body (110) and comprises means preventing its rotation around a axis (X) passing through the central opening (120).
    [5" id="c-fr-0005]
    The lens of claim 4, wherein the ridge (115) is formed by an end edge of a wall (112) surrounding the central opening (120).
    [6" id="c-fr-0006]
    6. A lens according to one of claims 1 to 5, wherein the liquid (190) is received between the blade (150) and the body (110) with insufficient pressure to cause deformation of the blade (150).
    [7" id="c-fr-0007]
    7. The lens according to one of claims 1 to 6, wherein the liquid (190) is retained in a chamber formed by the blade (150) and by an elastic membrane (170).
    [8" id="c-fr-0008]
    8. Optical assembly comprising a first lens (100) according to one of claims 1 to 7 and a second lens (200) of spherical power variable along an optical axis (X).
    [9" id="c-fr-0009]
    The optical assembly of claim 8, wherein said spherical power is variable by moving a mechanical member (280) of the second lens (200).
    [10" id="c-fr-0010]
    An optical assembly according to claim 8 or 9, wherein the body (110) of the first lens (100) is rotatably mounted about the optical axis (X).
    [11" id="c-fr-0011]
    An optical assembly according to claim 10 in accordance with claim 9, wherein a first drive system is adapted to move the element (160) of the first lens (100), wherein a second drive system The drive is adapted to move the mechanical element (280) of the second lens (200) and wherein a third drive system is adapted to drive the body (110) in rotation about the optical axis (X).
    [12" id="c-fr-0012]
    The optical assembly of claim 11, wherein the third drive system is adapted to move the optical assembly integrally with the body (110) in rotation about the optical axis (X).
    [13" id="c-fr-0013]
    An optical assembly according to claim 11, wherein the third drive system is adapted to drive the body (110) independently of the element (160) of the first lens (100) and the mechanical element (280). of the second lens (200) and wherein control means of the first drive system and the second drive system are adapted to drive the first drive system so as to maintain a given relative position between the body (110) ) and the element (160) of the first lens (100), and for driving the second drive system so as to maintain a given relative position between the body (110) and the mechanical element (280) of the second lens (200).
    [14" id="c-fr-0014]
    14. Visual compensation device comprising an optical assembly according to one of claims 11 to 13.
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    同族专利:
    公开号 | 公开日
    KR20180039636A|2018-04-18|
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    FR3039901B1|2017-09-08|
    US10634936B2|2020-04-28|
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    CN107923998A|2018-04-17|
    US20180210232A1|2018-07-26|
    JP2018525673A|2018-09-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0291596A1|1985-11-05|1988-11-23|Oxford Lensats Limited|Suspension system fora flexible optical membrane|
    DE3712145A1|1986-04-11|1988-03-17|Canon Kk|Optical component of adjustable focal length|
    WO2015107303A1|2014-01-20|2015-07-23|Essilor International |Visual compensation system and optometric binocular device|CN111110182A|2019-12-27|2020-05-08|河北工业职业技术学院|Lens group structure for vision detection and vision detection method|US5229885A|1991-09-03|1993-07-20|Quaglia Lawrence D|Infinitely variable focal power lens units precisely matched to varying distances by radar and electronics|
    US8064142B2|2005-05-14|2011-11-22|Holochip Corporation|Fluidic lens with reduced optical aberration|
    EP2034338A1|2007-08-11|2009-03-11|ETH Zurich|Liquid Lens System|EP3598211A1|2018-07-20|2020-01-22|Essilor International|Method for determining a value of a global sensitivity parameter of a subject, methods using this value and system for determining said value|
    CN110989056B|2019-11-25|2021-06-15|Oppo广东移动通信有限公司|Extrusion type liquid lens and lens module|
    EP3881752A1|2020-03-20|2021-09-22|Essilor International|System for determining a subjective value of an optical feature of at least a corrective lens adapted to an eye of a subject and associated method|
    法律状态:
    2016-08-25| PLFP| Fee payment|Year of fee payment: 2 |
    2017-02-10| PLSC| Publication of the preliminary search report|Effective date: 20170210 |
    2017-08-25| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-06| TP| Transmission of property|Owner name: ESSILOR INTERNATIONAL, FR Effective date: 20180601 |
    2018-08-27| PLFP| Fee payment|Year of fee payment: 4 |
    2019-08-26| PLFP| Fee payment|Year of fee payment: 5 |
    2020-08-25| PLFP| Fee payment|Year of fee payment: 6 |
    2021-08-25| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1557532A|FR3039901B1|2015-08-04|2015-08-04|VARIABLE OPTICAL POWER LENS, OPTICAL ASSEMBLY COMPRISING SUCH A LENS AND VISUAL COMPENSATION DEVICE COMPRISING SUCH AN OPTICAL ASSEMBLY|FR1557532A| FR3039901B1|2015-08-04|2015-08-04|VARIABLE OPTICAL POWER LENS, OPTICAL ASSEMBLY COMPRISING SUCH A LENS AND VISUAL COMPENSATION DEVICE COMPRISING SUCH AN OPTICAL ASSEMBLY|
    EP16757710.5A| EP3332275B1|2015-08-04|2016-08-04|Lens of variable optical power, optical assembly comprising such a lens and vision-correcting device comprising such an optical assembly|
    US15/747,804| US10634936B2|2015-08-04|2016-08-04|Lens of variable optical power, optical assembly comprising such a lens and vision-correcting device comprising such an optical assembly|
    JP2018505445A| JP2018525673A|2015-08-04|2016-08-04|Optical power variable lens, optical assembly including such a lens, and vision correction apparatus including such an optical assembly|
    PCT/FR2016/052032| WO2017021663A1|2015-08-04|2016-08-04|Lens of variable optical power, optical assembly comprising such a lens and vision-correcting device comprising such an optical assembly|
    KR1020187003122A| KR20180039636A|2015-08-04|2016-08-04|A lens of variable optical power, an optical assembly including such a lens, and a vision correction device|
    CN201680045418.1A| CN107923998B|2015-08-04|2016-08-04|Lens with variable optical power, optical assembly comprising such a lens and vision correction device comprising such an optical assembly|
    IL257180A| IL257180D0|2015-08-04|2018-01-28|Lens of variable optical power, optical assembly comprising such a lens and vision-correcting device comprising such an optical assembly|
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