• 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:
    Laser Confocal Sensor Metrology System The present invention relates to an apparatus for a non-contact method of obtaining accurate three-dimensional measurements of a dry contact lens, more specifically by using dry lens metrology in order to know an exact thickness of a contact lens.
    公开号:BR112013013440A2
    申请号:R112013013440
    申请日:2011-11-29
    公开日:2019-12-03
    发明作者:Wildsmith Christopher；B Enns John；P Powell Mark；F Widman Michael；W Sites Peter
    申请人:Johnson & Johnson Vision Care；
    IPC主号:
    专利说明:

    Descriptive Report of the Invention Patent for METROLOGY SYSTEM WITH CONFOCAL LASER SENSOR.
    RELATED REQUESTS
    This application claims priority over US patent application serial number 13 / 305,666 that was filed on November 28, 2011; and US provisional patent application serial number 61 / 418,148 that was filed on November 30, 2010, the contents of which are based on and incorporated by reference.
    FIELD OF USE
    This invention describes an apparatus for a non-contact method of obtaining accurate three-dimensional measurements of a dry contact lens, more specifically, with the use of dry lens metrology in order to know the exact thickness of a contact lens. BACKGROUND OF THE INVENTION
    Ophthalmic lenses are often made by casting, in which a monomeric material is deposited in a defined cavity between the optical surfaces of the opposite parts of a mold. The multi-part molds used to mold the hydrogels forming a useful article, such as an ophthalmic lens, can include, for example, a first mold part with a convex portion that corresponds to the curve of the back of an ophthalmic lens and a second part mold with a concave portion that corresponds to the curve of the front part of the ophthalmic lens. To prepare a lens using these mold parts, an uncured hydrogel lens formulation is placed between a disposable front curved mold plastic part and a disposable posterior curved mold plastic part.
    The front curved mold part and the rear curved mold part are typically formed using injection molding techniques, in which the molten plastic is forced into a highly machined steel implement with at least one optical quality surface.
    The front and rear curved mold parts are placed
    2/18 side by side to conform the lens according to the desired parameters. The lens formulation was subsequently cured, for example, by exposure to light, thereby forming a lens. After curing, the mold parts are separated and the lens is removed from the mold parts.
    Casting ophthalmic lenses has been particularly satisfactory in high volume productions for a limited number of lens sizes and strengths. However, the nature of the injection molding equipment and processes makes it difficult to form specific lenses customized to a particular patient's eye or to a particular application. Consequently, other techniques were examined, such as: turning a lens button and stereolithography techniques. However, turning requires a lens material with a high modulus, it is time-consuming and limited in terms of the available surface range and stereolithography does not produce a lens suitable for human use.
    In previous descriptions, methods and devices for forming personalized lenses using voxel-based lithographic techniques have been described. An important aspect of these techniques is that a lens is produced in an innovative way where one of two surfaces of the lens is formed freely without molding by casting, turning or other implementations. A free-forming surface and base may include a continuous flowing medium included in the free-forming surface. This combination results in a device sometimes referred to as a lens precursor. Hydration and fixation radiation treatments can typically be used to convert a Lens Precursor to an ophthalmic lens.
    A freeform lens created in this way may need to be measured in order to determine the physical parameters of the lens. Therefore, the apparatus and methods are necessary to measure a lens formed from a precursor.
    SUMMARY
    Consequently, the present invention relates to methods and apparatus for measuring an ophthalmic lens and, in some embodiments, a
    3/18 non-contact optical instrument can be used to determine an accurate thickness measurement of an ophthalmic lens. Some modalities additionally include apparatus and measurement methods for measuring an ophthalmic lens in three dimensions.
    In general, the present invention includes a confocal displacement sensor and a set of optical elements, which, in some embodiments, may include an optical forming element used as a posterior curve to form an ophthalmic lens. In some preferred embodiments, a set of optical elements can be mounted in a kinematic assembly that can be fixedly fixed to a rotational air bearing platform.
    Some embodiments may also include an apparatus for adjusting the positioning of one or both of an optical forming element mandrel that holds an ophthalmic lens and a measuring device. For example, in some modalities, adjustments can be made on the device until a center of rotation for a set of optical forming elements and a displacement sensor can be aligned, and precise measurements can be taken from a lens and a set of optical training elements through an adjusted device.
    In another aspect, in some embodiments, for example, a displacement sensor can take measurements from an optical forming element mandrel that does not contain a lens. Subsequently, a data file of an optical forming element measurement can be used as a reference file that can be used to compare to a measurement taken from an optical forming element containing a lens. In some modalities, the measurement data obtained can be stored in several modalities.
    In yet another aspect, in some embodiments, a set of optical forming elements can be mounted in a kinematic assembly and can also be used more than once to form an ophthalmic lens. Subsequently, a measurement can be performed at
    4/18 from a set of optical forming elements containing a lens mounted thereon, and accurate measurement data can subsequently be stored in various modalities. Comparisons can be made between descriptive measurement data of one or more of an optical forming element, an ophthalmic lens and an optical forming element containing an ophthalmic lens in it.
    Other aspects may include, data files that comprise measurement information that can later be converted from spherical radial coordinates to one or both of axial coordinates and other spatial indicators. Several data files can be mathematically compared to create an axial thickness file for a measured lens.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Fig. 1 illustrates a plan view of an ophthalmic lens in a mandrel and a confocal displacement sensor according to some embodiments of the present invention.
    Fig. 2A illustrates a cross section of a kinematic assembly and a set of optical forming elements.
    Fig. 2B shows a top view of a kinematic assembly and an optical forming element mandrel.
    Fig. 3A illustrates a side view of a metrology apparatus that includes a sensor rotation axis and multiple displacement sensor adjusters.
    Fig. 3B illustrates a more enlarged side view of a metrology apparatus that includes an optical forming element rotation axis and multiple forming optical element adjusters.
    Fig. 4 illustrates method steps according to some additional aspect of the present invention.
    Figs. 5A and 5B illustrate metrology data represented in spherical radial coordinates.
    Fig. 6 illustrates a processor that can be used to implement some embodiments of the present invention.
    5/18
    DETAILED DESCRIPTION
    The present invention provides methods and apparatus for measuring a thickness of one or both of a lens and lens precursor. In the following sections, detailed descriptions of the modalities of the invention will be provided. The description of both alternative and preferred modalities, although complete, are only exemplary modalities, and those skilled in the art will understand that variations, modifications and alterations may be apparent. Therefore, it should be understood that said exemplifying modalities do not limit the breadth of aspects of the sustained invention. Method steps described here are mentioned in a logical sequence in this discussion. However, in no way does this sequence limit the order in which they can be implemented, unless otherwise stated. In addition, not all steps are necessary to implement the present invention and additional steps may be included in various embodiments of the present invention.
    Glossary
    In this description and claims directed to the presented invention, several terms can be used, in which case, the following definitions apply:
    The term actinic radiation for use in the present invention refers to radiation that is capable of initiating a chemical reaction, such as, for example, polymerization of a reactive mixture.
    The term arcuate for use in the present invention refers to an arc-like curve or flexion.
    The term Beer's Law as called in the present invention and sometimes called the Beer-Lambert Law is: l (x) / IO = exp (- cx), where l (x) is the intensity as a function of the distance x of irradiated surface, IO is the intensity incident on the surface, it is the absorption coefficient of the absorption component, and c is the concentration of the absorption component.
    The term collimate as used here means to limit the conical angle of the radiation, as radiation of light that follows as the output of a device receiving radiation as an input; in some modalities, the
    6/18 tapered guide can be limited so that the rays of light that follow are parallel. Consequently, a collimator includes an apparatus that performs this function and collimated describes the effect on radiation.
    The term DMD (digital micromirror device) for use in the present invention, a digital micromirror device is a spatial modulator of bistable light that consists of an array of mobile micro mirrors functionally mounted on a CMOS SRAM. Each mirror is independently controlled by loading data into the memory cell below the mirror to orient the reflected light, spatially mapping a pixel of video data to a pixel on a screen. The data electrostatically controls the mirror's angle of inclination in a binary way, where the mirror states are degrees + X (on) or degrees -X (off). For current devices, X can be 10 degrees or 12 degrees (nominal). The light reflected by the mirrors is then passed through a projection lens and over a viewfinder. The light is reflected from a distance that creates a dark field, and defines the dark level floor of the image. The images are created by gray scale modulation between the levels of on (on) and off (off) at a rate fast enough to be integrated by the observer. The DMD is sometimes DLP projection systems.
    The term DMD Script for use in the present invention should refer to a control protocol for a spatial light modulator and also to control signals from any system component, such as a light source or filter wheel that may include a series of command sequences in time. The use of the acronym DMD is not intended to limit the use of this term to any particular type or size of spatial light modulator.
    The term fixation radiation as used here, refers to sufficient actinic radiation for one or more of: polymerize and crosslink, essentially any reactive mixture comprising a lens or lens precursor.
    The term fluent reactive lens medium for use in the present invention
    7/18 prevention means a reactive mixture that is flowable in its native form, reacted or partially reacted form, and a portion or all of the reactive medium that can be formed by further processing on a part of an ophthalmic lens.
    The term free form for use in the present invention, as freely formed or free form refers to a surface that is formed by crosslinking a reactive mixture and is not shaped according to a die casting, turning or laser ablation mold.
    The term gel point for use in the present invention refers to the point at which an insoluble gel or fraction is seen for the first time. The gel point is the extent of conversion where a liquid polymerization mixture becomes a solid.
    The term lens for use in the present invention refers to any ophthalmic device that resides in or on the eye. These devices can provide optical correction or they can be cosmetic. For example, the term lens can refer to a contact lens, intraocular lens, overlap lens, ocular insertion element, optical insertion element or other similar device through which vision is corrected or modified, or through which Eye physiology is cosmetically enhanced (for example, iris color), without impairing vision. In some embodiments, the preferred lenses of the invention are soft contact lenses, made of hydrogels or silicone elastomers, which include, but are not limited to, silicone hydrogels and silicone fluorine hydrogels.
    The term lens precursor for use in the present invention means a composite object consisting of a lens precursor form and a reactive mixture of lens flowing in contact with the lens precursor form. For example, in some embodiments, the fluent reactive lens medium is formed in the course of producing a lens precursor form in a volume of reactive mixture. The separation of the lens precursor form and the attached fluent reactive lens medium from the volume of reactive mixture used to produce the lens precursor form can generate a lens precursor. Additionally, a lens precursor can be converted to a
    8/18 different entity by removing significant amounts of reactive fluent lens mixture or converting a significant amount of reactive lens fluent medium to the incorporated non-fluent material.
    The term lens precursor form for use in the present invention means a non-fluent object with at least one optical quality surface that is consistently incorporated, by further processing, into an ophthalmic lens.
    The term lens-forming mixture for use in the present invention, the term, reactive mixture or MMR (reactive monomer mixture) refers to a monomer or prepolymer material that can be cross-linked to form an ophthalmic lens. Various modalities may include mixtures for lens formation with one or more additives such as: UV blockers, toners, photoinitiators or catalysts, and other additives that may be desirable in ophthalmic lenses such as, contact or intraocular lenses.
    The term mold for use in the present invention refers to a rigid or semi-rigid object that can be used to form lenses from uncured formulations. Some preferred molds include two mold parts that form an anterior curve mold part and a posterior curve mold part.
    The term radiation-absorbing component for use in the present invention refers to a radiation-absorbing component that can be combined in a reactive monomer mixture formulation and that can absorb radiation over a specific wavelength range.
    Reactive mixture (also sometimes referred to in the present invention as: lens-forming mixture or mixture of reactive monomers and with the same meaning as lens-forming mixture).
    The term releasing from a mold for use in the present invention means that a lens becomes completely detached from the mold or is only fixed freely so that it can be removed with moderate agitation or pushed out with a cotton swab.
    9/18
    The term stereolithographic lens precursor for use in the present invention means a lens precursor where the lens precursor form is formed by the use of a stereolithographic technique.
    The term substrate as used here means a physical entity by which other entities are placed or formed, sometimes referred to in the present invention as substrate or a mandrel.
    The term transient lens reactive medium for use in the present invention means a reactive mixture that remains in a lens precursor form and is not fully polymerized and can remain in either a fluent or non-fluent form. The transient reactive lens medium is significantly removed by one or more of: cleaning, solvation and hydration steps before becoming incorporated into an ophthalmic lens. Therefore, for clarity, the combination of a lens precursor form and the transient reactive lens mixture does not constitute a lens precursor.
    The term voxel for use in the present invention voxel or actinic radiation voxel is a volume element, which represents a value in a regular grid in three-dimensional space. A voxel can be viewed as a three-dimensional pixel, however, where a pixel represents 2D image data, a voxel includes a third dimension. Furthermore, since voxels are often used in the visualization and analysis of medical and scientific data, in the present invention, a voxel is used to define the limits of an amount of actinic radiation that reach a particular volume of reactive mixture, thereby controlling the rate of crosslinking or polymerization of this specific volume of reactive mixture. As an example, voxels are considered in the present invention as existing in a single layer conformed to a 2D mold surface, and the actinic radiation can normally be directed to the 2D surface and in a common axial dimension of each voxel. As an example, the specific volume of reactive mixture can be cross-linked or polymerized according to 768x768 voxels.
    The term voxel-based lens precursor for use in the present invention means a lens precursor where the precursor form of
    10/18 lens is formed by the use of a voxel-based lithographic technique.
    The term Xgel for use in the present invention is the extent of the chemical conversion of a crosslinkable reactive mixture in which the gel fraction becomes greater than zero.
    The term mandrel for use in the present invention includes an article with a surface shaped to hold an ophthalmic lens.
    Now, referring to Fig. 1, it illustrates a plan view of an ophthalmic lens 101 in a forming optical element mandrel 102 and a confocal displacement sensor 100 according to some embodiments of the present invention. In some embodiments, a displacement sensor 100 may include one or more of an objective lens 106, a laser beam source 107, and a camera 108. In some additional embodiments, through a central optical portion of an objective lens 106, a laser beam 109 can be focused on a directed surface. In some other embodiments, an objective lens 106 can swing up and down by changing a laser beam focal point 109 until a camera 108 determines in which position an objective lens 106 can achieve a sharp focus. Additionally, in some embodiments, a laser beam 109 can be reflected from a surface on a camera 108, at which the target height of a displacement sensor 100 can be determined.
    In addition, in some embodiments, a displacement sensor 100 can compute the displacement of a surface. In some preferred embodiments, for example, a displacement sensor 100 may have an operating range of 30 mm and may have a thickness of more than 1 mm to less than 1 mm, while maintaining adequate displacement accuracy. For exemplary purposes, in some embodiments, a displacement sensor 100 may include the Keyence LT-9030M model (Japan) or any other displacement sensor known to those in the art.
    As shown in Fig. 1, an optics forming mandrel 102 can be used to form a posterior curve of a lens 101. In some embodiments, an optics forming mandrel.
    11/18
    102 can rest on a metal structure 103, which together comprises a set of optical forming elements 104. In some other embodiments, a kinematic mounting device 105 can hold a set of optical forming elements 104 in place. For those skilled in the art, a kinematic assembly 105 can be defined as a mechanism for assembling an object in a fixed position relative to each other. In some embodiments, using a kinematic assembly 105 and an assembly technique to deploy it, may allow a set of forming optical elements 104 to maintain a precise position whenever a set of forming optical elements 104 can be mounted in one kinematic assembly 105. In addition, in some modalities, which concern where a displacement sensor 100 can take a reference measure in a forming optical element 102, this can be functionally important for a set of forming optical elements 104 to maintain a precise mounting position each time, to obtain accurate measurement data. Consequently, in some embodiments, for example, a set of optical forming elements 104 that maintains a precise position may allow one or both to form and measure a lens 101 at an exact location of an optical forming element 102 each time, and that a forming optical element 102 is measured in an exact position each time.
    Now with reference to Figs. 2A and 2B, Fig. 2A illustrates a cross section of a kinematic assembly 205 and a set of forming optical elements 204, a set of forming optical elements 204 including both a forming optical element mandrel 202 and a frame metal 203. Fig. 2B illustrates a top view of a kinematic assembly 205 and an optical forming element mandrel 202. In some embodiments, a plate top of a kinematic assembly 205 may include one or multiple spheres 200 included in one hole. In some additional embodiments, a kinematic assembly 205 may include one or multiple threads 201 that can assist in adjusting the height of a sphere 200 until a sphere 200 can touch a
    12/18 set of forming optical elements 204 at a single point through which a set of forming optical elements 204 can be leveled on an axis of rotation of forming optical element.
    In addition, in some other embodiments, a kinematic assembly 205 may include one or more adjuster ball pins 207 and a plunger 206 that can assist in holding a kinematic assembly 205 in place. Consequently, in some embodiments, a spring pin assembly 210 may include one or more of a plunger 206 that can be driven by a groove, a spring 208 that can be seated behind a plunger 206 and a thread of a spring pin assembly. spring 209 that can capture a spring 208.
    In some aspects of this invention, a plunger 206 can move freely in and out, with a plunger 206 being able to engage a set of forming optical elements 204 in a position by compressing into a notch 211. More specifically, in some embodiments, for example, a notch 211 can hold a set of forming optical elements 204 to remain inclined at a right angle while a spring 208 can push a plunger 206 into a notch 211. In some additional embodiments, a set spring pin 210 through a plunger 206, can push a set of forming optical elements 204 in a certain direction (for example, left or right), and an edge of a set of forming optical elements 204 can collide in one or both adjuster ball pins 207. In addition, in some embodiments, adjusting an adjuster ball pin 207 may allow adjustment of an entire X, Y position of a co set of forming optical elements 204.
    In another aspect, a negative atmospheric pressure pump can be used to supply negative atmospheric pressure, or vacuum pressure 212 to a space between a set of forming optical elements 204 and a kinematic assembly 205 through an optical element rotation axis. training. In some embodiments, for example, a vacuum can be used to release a set of elements releasably
    13/18 forming optics 204 below on one or more spheres 200 but not, however, so that one or both of a spring 208 and a plunger 206 can be inhibited from pushing a set of forming optics 204 against a or both adjuster ball pins 207.
    Now with reference to Figs. 3A and 3B, Fig. 3A illustrates a side view of a metrology apparatus including a sensor rotation axis 301 and multiple displacement sensor adjusters 300. Fig. 3B illustrates a more enlarged side view of a metrology apparatus that includes a forming optical axis of rotation 308 and multiple forming optical element adjusters 302. In some embodiments, for example, a sensor 300 can rotate through a sensor axis of rotation 301 and a set of optical forming elements 304 mounted on a kinematic mounting device 305, can rotate through a rotating axis of forming optical element 308 for the entire duration of a measurement. For exemplary purposes, a rotating axis of forming optical element 308 and the rotating axis of sensor 301 are both state of the art servo motorized air bearing axles, which allow limited radial exhaust and axial movement of both axes' . In some preferred embodiments, a displacement sensor 300 and an optical forming mandrel 302 may be aligned, with a sensor 300 being centralized above a central sphere of an optical forming mandrel 302 during a measurement.
    In some embodiments, for example, a displacement sensor 300 can be manually aligned by adjusting one or more of a sensor adjuster 303, a sensor adjuster 306 and a sensor adjuster 307. Consequently, in some embodiments, a sensor adjuster x 303 can assist in aligning a displacement sensor 300 by allowing movement of a sensor 300 in and out along a geometric axis x. In some additional embodiments, a sensor y adjuster 306 can assist in aligning a displacement sensor 300 by moving a sensor 300 in and out along a y-axis.
    14/18
    In addition, in some embodiments, a sensor adjuster z 307 can assist in aligning a displacement sensor 300 by moving a sensor 300 up and down along a z axis. In addition, in preferred embodiments, a sensor adjuster 407 can assist in the movement of a displacement sensor 300 for a specific working radius, preferably 30 mm above a forming optical element mandrel 302.
    In some other embodiments, a set of optical forming elements 304 by adjusting a kinematic assembly 305 can be manually aligned by adjusting one or both of an optical forming element adjuster 309 and an optical forming element y adjuster 310. In some embodiments, for example, the adjustment of one or both of an optical forming element adjuster 309 and an optical forming element adjuster 310 can remove the eccentricity of a set of optical forming elements 304 when mounted on an axis of rotation of forming optical element 308, wherein an optical element of forming 302 can rotate in a center of an axis of rotation of forming optical element 308.
    In addition, in some additional modalities, when making measurements, a displacement sensor 300 can be rotated through a rotation axis of sensor 301 to a point of approximately 65 degrees from a relative position where a sensor 300 can be located when positioned directly above a forming optical element mandrel 302. Consequently, in some embodiments, a starting angle of the displacement sensor 300 to take a measurement may be greater or less in relation to one or both of a size of a surface diameter and a surface portion size. For example, in some embodiments, a starting angle of a displacement sensor 300 may be smaller to measure an optical zone of a lens as opposed to the measurement of an entire lens, and as opposed to the measurement of a forming optical element 302 without a lens.
    Consequently, an optical element rotation axis of
    15/18 training 308 can start to rotate continuously during a measurement. In some embodiments, for example, during a lens measurement, subsequent to a full rotation of a forming optical element rotation axis 308, a displacement sensor 300 may zero in on a remaining portion of a forming optical element 302 out of a lens edge. In some additional embodiments, a displacement sensor 300 can take a data point measurement in spherical radial coordinates, for every% degree of rotation produced from a rotating axis of forming optical element 308 thereby collecting a total of 1440 data points for a complete rotation of a rotation axis 308.
    In some additional embodiments, for every 0 ° rotation of a rotating axis of forming optical element 308, there may be a value for Θ and a value for each p angle of a sensor rotation axis 301, with a value of displacement can be determined. In some embodiments, for example, Rho values can be calculated so that equally increased axial rings of data can be collected during a measurement in which a data ring may need a rotation of a set of forming optical elements 304 followed by a subsequent rotation, while a sensor rotation axis 301 simultaneously moves to a next position. In addition, in some respects, a rotation axis of sensor 301 together with a displacement sensor 300 can move upwards for each position, and data points can be collected for each axial ring, for example, up to 140 axial rings during a measurement.
    Alternatively, in some additional aspects of the present invention, referring to Figure 4, a flow chart illustrates method steps that can be implemented to acquire metrology data and determine an axial thickness of an unhydrated ophthalmic lens. In some embodiments, an ophthalmic lens can be produced and needs to be measured to determine whether a lens meets the desired specifications. In 400, in some modalities of the present invention, a metrology device could
    16/18 must be aligned so that a displacement sensor can be directly centered above a center of a forming optical sphere. In 401, a reference measurement can be performed from an optical forming element mandrel without a lens on the surface of the forming optical element (M1). In 402, a measurement can be made of a lens formed on the same optical forming element (M2) mentioned in 401, and a reference measure of an optical forming element may have been made. In 403, the metrology data captured from M1 and M2 measurements can be converted from spherical radial coordinates to Cartesian coordinates (referring to Fig.
    5). At 404, an axial lens thickness value (M3) can be calculated, an M3 value being equal to a difference in an M1 metrology data file subtracted from an M2 metrology data file.
    Now, referring to Fig. 5A and 5B, Fig. 5A illustrates a displacement sensor 500 that performs a measurement of a lens 501 on a forming element mandrel 502, the metrology data being represented in coordinates spherical radials. Fig. 5B illustrates a top view of a forming optical element mandrel 502, with metrology data being represented in spherical radial coordinates. In some exemplifying modalities, a conversion of annotated spherical radial coordinates can be converted into axial thickness into Cartesian coordinates, such as X, Y coordinates that use one or more among several mathematical calculations. Some exemplary calculations that can be used are shown below, in which:
    Rj = polar radius r s = radius of set of optical elements for independent measurement formation key = sensor reading value Keyence
    Equation 1:
    Sen (90-p) = Z / (r s + key) Z = (r s + key) sen (90-p)
    17/18
    For Θ, Zi = (r s + keyi) sen (90-pi)
    Equation 2:
    Cos (90-pi) = Ri / r s + keyj
    Ri = (r s + keyj) (cos (90-pi))
    Equation 3:
    cosOi = Xj / Rj Xi = (r s + keyj) (cos (90-pi)) (cosOj)
    Equation 4:
    senOj = Yi / Ri Yi = (r s + keyi) (cos (90-pj)) (sen0i)
    Radial format:
    Three coordinates: Θ, p, and Keyence reading value + sphere radius.
    Axial Format:
    Three coordinates: X, Y and Z, where Z can denote thickness.
    Now, referring to Fig. 6, a controller 600 is illustrated which can be used to implement some aspects of the present invention. A processor unit 601, which may include one or more processors, coupled to a communication device 602 configured to communicate over a communication network. The communication device 602 can be used for communication, for example, with one or more controller devices or components of the manufacturing equipment.
    A processor 601 can also be used in communication with a storage device 603. A storage device 603 can comprise any suitable information storage device, including combinations of magnetic storage devices (for example, magnetic tape and hard drives), devices 18 / 18 optical storage devices, and / or semiconductor memory devices, such as devices with Random Access Memory (RAM) and devices with Read Only Memory (ROM).
    A storage device 603 can store an executable software program 604 to control a processor 601. A processor 601 executes instructions from a software program 604 and thus operates in accordance with the present invention, such as the steps of the method previously mentioned above. For example, a 601 processor can receive descriptive information from metrology data including an optical forming element reference measurement, a lens measurement, and the like. A storage device 603 can also store related data in one or more databases 605 and 606.
    Conclusion:
    Although the invention has been described with reference to certain modalities, those skilled in the art will understand that various changes can be made, and equivalents can be replaced by elements thereof, to adapt to particular situations without departing from the scope of the invention. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the invention without deviating from its scope.
    Therefore, the intention is that the present invention is not limited to the specific modalities presented as the best way contemplated for the realization of the same, but that the invention includes all modalities that fall within the scope and spirit of the attached claims.
    权利要求:
    Claims (6)
    [1]
    1. Apparatus for performing a method for measuring a non-hydrated device, the apparatus comprising:
    a metrology device capable of taking a measurement in response to a digital signal;
    a computer processor in digital communication with the metrology device;
    a digital media storage device in communication with the computer processor and executable software code storage that is executable on demand and operational with the processor and the metrology device for:
    store descriptive digital data from a metrology data inventory, said metrology data comprising a measurement;
    receiving a digital data entry describing one or more measurements from a metrology device; and calculating an axial thickness value for a lens.
    [2]
    An apparatus according to claim 1, which further comprises a communication device that connects the computer processor to a distributed network in which the executable software code is additionally operational for transmitting descriptive metrology data from a current inventory on the metrology device.
    [3]
    Apparatus according to claim 1, wherein said measurement comprises one or both measurements of an optical forming element mandrel and a lens measurement defined by a collection of data points.
    [4]
    4. Apparatus according to claim 3, in which the collection of data points comprises spherical radial coordinates.
    [5]
    Apparatus according to claim 4, in which the spherical radial coordinates can be converted to Cartesian axial coordinates.
    [6]
    6. Apparatus according to claim 1, in which the value of
    2/2 axial thickness of a lens comprises the difference between at least two measurements.
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    CN103229037B|2017-02-15|
    CA2819348A1|2012-06-07|
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    法律状态:
    2019-12-17| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-09-15| B11B| Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements|
    2021-10-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US41814810P| true| 2010-11-30|2010-11-30|
    US13/305,666|US20120133958A1|2010-11-30|2011-11-28|Laser confocal sensor metrology system|
    PCT/US2011/062408|WO2012075016A1|2010-11-30|2011-11-29|Laser confocal sensor metrology system|
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