Lens surface shape detection jig

Abstract

The utility model provides a lens surface shape detection tool comprising a pedestal which can be fixed on a non-contact three-dimensional optical contourgraph; the reference positioning mechanism is arranged in the center of the base, and at least one part of the reference positioning mechanism can reflect an optical signal emitted along the central axis of the non-contact three-dimensional optical contourgraph, so that the lens surface shape detection jig and the non-contact three-dimensional optical contourgraph share the same reference; the limiting mechanism is arranged on the base, the limiting mechanism is used for fixing the position of the lens so that the lens can be located in the center of the base, at least one part of the limiting mechanism makes contact with the non-effective diameter part of the lens so that the lens can be fixed in the direction perpendicular to the base, and at least the other part of the limiting mechanism makes contact with the outer periphery of the lens; and the lens is fixed in a plane parallel to the base. According to the utility model, the problem of large lens surface shape detection error in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lens surface shape detection, in particular to a lens surface shape detection jig. Background Art

[0002] With the development of science and technology, there are more and more application scenarios and functional requirements for various imaging devices. The lens used in imaging devices has become larger and larger, and the surface shape has become more and more diverse. The increase in the diameter and the asymmetry of the surface shape will increase the difficulty of molding. In addition, the difference in cooling temperature during the injection molding process will also cause the shape to change after molding, which has a great impact on the imaging quality. Due to the above factors, the molding difficulty has increased, and the injection molding process cannot be qualified in one molding. It is necessary to adjust the mold many times and repair the mold repeatedly. The basis for mold repair is based on the difference between the lens surface shape after the last molding and the theoretical surface shape. The smaller the test difference, the higher the accuracy of mold repair, and the lower the number of mold repairs, the product development cost can be greatly reduced. Therefore, the accuracy of mirror surface shape detection is very important. Especially with the opening of the metaverse era, VR equipment is not only a channel from the real world to the virtual world, but also one of the important cornerstones of the construction of the metaverse. VR large lenses are one of the most important optical components in VR devices, and the surface shape of large lenses is closely related to the performance of the final VR device.

[0003] At present, the conventional method of lens surface shape detection is to use LUPHOScan equipment to perform surface shape detection. First, the lens to be tested is placed on a support table, and then the device probe is used to scan any circle position on the lens surface. According to the scanning results, the lens and the support table are leveled and centered, and then the surface shape detection is performed. However, this test method cannot detect the existing eccentricity, tilt, etc. of the lens, which makes the test result different from the actual situation, resulting in the mold repair being unable to eliminate the influence of eccentricity and tilt, resulting in the final performance of the lens being NG.

[0004] That is to say, the lens surface shape detection in the prior art has the problem of large detection error. Utility Model Content

[0005] The main purpose of the utility model is to provide a lens surface shape detection jig to solve the problem of large lens surface shape detection error in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a lens surface shape detection jig, which is used to be fixed on a non-contact three-dimensional optical profiler, and the lens surface shape detection jig includes: a base, which can be fixed on the non-contact three-dimensional optical profiler; a reference positioning mechanism, which is arranged at the center of the base, and at least a part of the reference positioning mechanism can reflect the light signal emitted along the central axis of the non-contact three-dimensional optical profiler, so that the lens surface shape detection jig and the non-contact three-dimensional optical profiler have a common reference; a limiting mechanism, which is arranged on the base, and the limiting mechanism is used to fix the position of the lens so that the lens is located at the center of the base, at least a part of the limiting mechanism contacts the non-effective diameter part of the lens to fix the lens in a direction perpendicular to the base, and at least another part of the limiting mechanism contacts the outer peripheral edge of the lens to fix the lens in a plane parallel to the base.

[0007] Furthermore, the reference positioning mechanism includes a reference ball, a receiving groove is opened at the center of the base, the reference ball is placed in the receiving groove, the reference ball has a positioning point, and the non-contact three-dimensional optical profiler can receive the light signal reflected by the positioning point so that the lens surface shape detection fixture and the non-contact three-dimensional optical profiler have a common reference.

[0008] Furthermore, the reference positioning mechanism also includes a positioning ring, which is arranged around the edge of the base, and the limiting mechanism is located in the positioning ring. The positioning ring has a protrusion extending along the axial direction of the positioning ring to locate the spatial position of the lens surface shape detection fixture.

[0009] Furthermore, the width of the positioning ring is greater than or equal to 2 mm.

[0010] Furthermore, the limiting mechanism includes: a horizontal positioning component, at least a portion of which abuts against the outer periphery of the lens to fix the lens in the horizontal direction; and at least three longitudinal positioning components, at least a portion of which abuts against the non-effective diameter of the lens to fix the lens in the height direction.

[0011] Furthermore, the horizontal positioning assembly includes at least two horizontal limiters, which are fixed on the base. The extension directions of the two horizontal limiters are perpendicular, and one side of the horizontal limiter close to the center of the base abuts against the outer periphery of the lens.

[0012] Furthermore, the horizontal positioning assembly also includes at least one movable clamping member, which can move radially along the base to clamp the outer periphery of the lens.

[0013] Furthermore, the number of movable clamping parts is at least two, the line connecting at least one horizontal limit part and the movable clamping part is a first line, the line connecting at least another horizontal limit part and another movable clamping part is a second line, and the first line and the second line are perpendicular to each other.

[0014] Furthermore, a positioning groove is provided on the base, and at least a portion of the movable clamping member is located in the positioning groove and elastically connected to the positioning groove, so that the movable clamping member can move along the radial direction of the base.

[0015] Furthermore, a magnetic attraction member extending radially of the base is fixed on the base, and the movable clamping member is a magnetic member. The magnetic attraction member can drive the magnetic member to move radially of the base so that the magnetic member can abut against the outer periphery of the lens.

[0016] Furthermore, the longitudinal positioning assembly includes: a clamping portion, one end of which can abut against the non-effective diameter of the side of the lens away from the base; a connecting portion, the connecting portion is fixed on the base, and one end of the clamping portion away from the lens is rotatably connected to the connecting portion so that the clamping portion can rotate on a horizontal plane parallel to the base.

[0017] Furthermore, the connecting part includes: a fixed column, which is upright on the base; an extension rod, one end of which is fixed on the fixed column, and the extension rod extends in a direction parallel to the base; a connecting rod, which passes through one end of the extension rod away from the fixed column, and the connecting rod extends in a direction perpendicular to the base, and the clamping part is rotatably connected to the connecting rod; a limiting nut, which is located on the side of the clamping part away from the extension rod, and the limiting nut can be rotated on the connecting rod so that the clamping part is limited between the limiting nut and the extension rod.

[0018] Furthermore, the limiting mechanism also includes a plurality of supporting structures, which are arranged at intervals, and the supporting structures abut against the non-effective diameter of the side of the lens facing the base, and the height difference of all the supporting structures is less than 1 micron.

[0019] By applying the technical solution of the utility model, a lens surface shape detection jig is used to be fixed on a non-contact three-dimensional optical profiler, and the lens surface shape detection jig includes a base, a reference positioning mechanism and a limiting mechanism, and the base can be fixed on the non-contact three-dimensional optical profiler; the reference positioning mechanism is arranged at the center of the base, and at least a part of the reference positioning mechanism can reflect the light signal emitted along the central axis of the non-contact three-dimensional optical profiler so that the lens surface shape detection jig and the non-contact three-dimensional optical profiler have a common reference; the limiting mechanism is arranged on the base, and the limiting mechanism is used to fix the position of the lens so that the lens is located at the center of the base, at least a part of the limiting mechanism contacts the non-effective diameter part of the lens to fix the lens in a direction perpendicular to the base, and at least another part of the limiting mechanism contacts the outer peripheral edge of the lens to fix the lens in a plane parallel to the base.

[0020] The lens surface shape detection fixture of the present application uses the light signal emitted by the central axis of the non-contact three-dimensional optical profiler to adjust the position of the lens surface shape detection fixture so that the reference positioning mechanism located at the center of the base reflects the light signal, thereby realizing the common reference of the lens surface shape detection fixture and the non-contact three-dimensional optical profiler. In this way, when detecting the lens surface shape, the influence of the existing eccentricity and tilt of the lens on the measurement result can be avoided, and the actual state of the lens can be directly tested to ensure absolute measurement. The lens is limited in the direction perpendicular and parallel to the base by the limiting mechanism to avoid the error caused by the change of the lens position during the measurement process, ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A schematic diagram showing an angle of a lens surface shape detection jig according to an optional embodiment of the utility model is shown;

[0023] Figure 2 Shows Figure 1 A top view of the lens surface shape detection fixture in FIG.

[0024] Figure 3 Shows Figure 2 The cross-sectional view of the lens surface shape detection fixture in the AA direction;

[0025] Figure 4 Shows Figure 2 Cross-sectional view of the lens surface shape detection fixture in the DD direction.

[0026] The above drawings include the following reference numerals:

[0027] 10. Base; 20. Reference positioning mechanism; 21. Reference ball; 22. Positioning ring; 221. Bump; 30. Limiting mechanism; 31. Horizontal positioning assembly; 311. Horizontal limiting member; 312. Movable clamping member; 313. Connecting hole; 32. Longitudinal positioning assembly; 321. Clamping portion; 322. Connecting portion; 323. Fixed column; 324. Extension rod; 325. Connecting rod; 326. Limiting nut; 33. Supporting structure; 40. Lens; 50. Threaded hole. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] In order to solve the problem of large error in lens surface shape detection in the prior art, the utility model provides a lens surface shape detection jig.

[0032] like Figures 1 to 4 As shown, the lens surface shape detection jig is used to be fixed on a non-contact three-dimensional optical profiler. The lens surface shape detection jig includes a base 10, a reference positioning mechanism 20 and a limiting mechanism 30. The base 10 can be fixed on the non-contact three-dimensional optical profiler; the reference positioning mechanism 20 is arranged at the center of the base 10, and at least a part of the reference positioning mechanism 20 can reflect the light signal emitted along the central axis of the non-contact three-dimensional optical profiler so that the lens surface shape detection jig and the non-contact three-dimensional optical profiler have a common reference; the limiting mechanism 30 is arranged on the base 10, and the limiting mechanism 30 is used to fix the position of the lens 40 so that the lens 40 is located at the center of the base 10, at least a part of the limiting mechanism 30 contacts the non-effective diameter part of the lens 40 to fix the lens 40 in a direction perpendicular to the base 10, and at least another part of the limiting mechanism 30 contacts the outer peripheral edge of the lens 40 to fix the lens 40 in a plane parallel to the base 10.

[0033] The lens surface shape detection fixture of the present application uses the light signal emitted by the central axis of the non-contact three-dimensional optical profiler to adjust the position of the lens surface shape detection fixture so that the reference positioning mechanism 20 located at the center of the base 10 reflects the light signal, thereby realizing the common reference of the lens surface shape detection fixture and the non-contact three-dimensional optical profiler. In this way, when detecting the lens surface shape, the eccentricity and tilt of the lens 40 can be avoided from affecting the measurement results, and the actual state of the lens 40 can be directly tested to ensure absolute measurement. The lens 40 is limited in the direction perpendicular to and parallel to the base 10 by the limiting mechanism 30 to avoid errors caused by changes in the position of the lens 40 during the measurement process, ensuring accurate measurement results.

[0034] like Figure 3 and Figure 4As shown, the reference positioning mechanism 20 includes a reference ball 21. A receiving groove is provided at the center of the base 10. The reference ball 21 is placed in the receiving groove. The reference ball 21 has a positioning point. The non-contact three-dimensional optical profiler can receive the light signal reflected by the positioning point so that the lens surface shape detection jig and the non-contact three-dimensional optical profiler have a common reference. Since the reference ball 21 is in a movable state in the receiving groove, the state of the reference ball 21 will also change when the placement posture of the lens surface shape detection jig is adjusted. The position of the positioning point on the reference ball 21 also reflects the state of the central axis of the lens surface shape detection jig. When the positioning point can reflect the light signal emitted from the central axis of the non-contact three-dimensional optical profiler, it can be proved that the lens surface shape detection jig and the non-contact three-dimensional optical profiler have a common reference.

[0035] Specifically, the surface of the reference sphere 21 is processed by a polishing process to ensure that the surface roughness can reach the order of tens of nanometers, so as to accurately reflect the optical signal of the non-contact three-dimensional optical profiler and accurately locate the center position of the circle.

[0036] It should be noted that the size of the receiving groove matches the size of the reference ball 21 to ensure that the central axis of the reference ball 21 is always collinear with the central axis of the lens surface shape detection fixture during its movement.

[0037] like Figure 3 and Figure 4 As shown, the reference positioning mechanism 20 also includes a positioning ring 22, which is arranged around the edge of the base 10, and the limiting mechanism 30 is located in the positioning ring 22. The positioning ring 22 has a protrusion 221 extending along the axial direction of the positioning ring 22 to locate the spatial position of the lens surface shape detection fixture. By providing the positioning ring 22 and the protrusion 221, a reference is further provided for the non-contact three-dimensional optical profilometer to identify the position of the surface shape detection fixture.

[0038] Specifically, the width of the positioning ring 22 is greater than or equal to 2 mm, which improves the recognition effect while ensuring processability. The surface of the positioning ring 22 is smooth, with a roughness of tens of nanometers. The X / Y / Z directions of the lens surface shape detection fixture can be determined based on the contour of the positioning ring 22. During the test, the spatial position of the lens surface shape detection fixture can be determined by scanning the reference ball 21 and the positioning ring 22 through the equipment, and the fixture position can be adjusted according to the light signal and the reflection signal.

[0039] like Figure 1 and Figure 2As shown, the limiting mechanism 30 includes a horizontal positioning component 31 and at least three longitudinal positioning components 32. At least a portion of the horizontal positioning component 31 abuts against the outer periphery of the lens 40 to fix the lens 40 in the horizontal direction; at least a portion of the longitudinal positioning component 32 abuts against the non-effective diameter of the lens 40 to fix the lens 40 in the height direction. The horizontal positioning component 31 and the longitudinal positioning component 32 abut against the side and outer periphery of the non-effective diameter to fix the lens 40, thereby ensuring that the position of the lens 40 is stable and does not deviate.

[0040] like Figure 1 and Figure 2 As shown, the horizontal positioning assembly 31 includes at least two horizontal stoppers 311, which are fixed on the base 10. The extension directions of the two horizontal stoppers 311 are perpendicular, and the horizontal stoppers 311 and the side close to the center of the base 10 abut against the outer periphery of the lens 40. By vertically arranging the two horizontal stoppers 311, the horizontal position of the lens 40 is limited in two vertical directions. The distance between the horizontal stopper 311 and the reference ball 21 is set at different positions according to the size of the lens to be measured.

[0041] like Figure 1 and Figure 2 As shown, the horizontal positioning assembly 31 also includes at least one movable clamping member 312, which can move along the radial direction of the base 10 to clamp the outer periphery of the lens 40. By setting the movable clamping member 312 to be movable along the radial direction of the base 10, before the outer periphery of the lens 40 abuts against the horizontal limiter 311, the movable clamping member 312 can be moved to a position away from the center to provide sufficient space for the placement of the lens 40. After abutting against the horizontal limiter 311, the position of the movable clamping member 312 is adjusted to abut the outer periphery of the lens 40, thereby further fixing the position of the lens 40 on the horizontal plane. The stroke of the movable clamping member 312 is adjusted according to the size of the lens 40 within a smaller range to ensure that the lens 40 is fixed without causing the surface shape to change due to excessive pressure of the movable clamping member 312.

[0042] Preferably, the number of the movable clamping members 312 is at least two, the line connecting at least one horizontal stopper 311 and the movable clamping member 312 is a first line, the line connecting at least another horizontal stopper 311 and another movable clamping member 312 is a second line, and the first line and the second line are perpendicular to each other. After the two horizontal stoppers 311 locate the position of the lens 40, two corresponding movable clamping members 312 are used to limit the position of the lens 40, and the first line and the second line are set to be perpendicular to each other, so as to further reduce the risk of the lens 40 shaking.

[0043] Optionally, a positioning groove is provided on the base 10, and at least a portion of the movable clamp 312 is located in the positioning groove and is elastically connected to the positioning groove, so that the movable clamp 312 can move radially along the base 10. By providing a positioning groove for the movable clamp 312 to move, and the movable clamp 312 is elastically connected in the positioning groove, it is convenient for the movable clamp 312 to automatically adjust its position to the edge of the lens 40, and the moving path is clear and stable, and the processing difficulty is not high. Due to the differences in the jigs of the same batch of samples, the position of the movable clamp 312 can also be changed through the range of the elastic connection to adapt to samples with different outer diameters.

[0044] like Figure 1 and Figure 2 As shown, the movable clamping member 312 has at least one connecting hole 313 that passes through the movable clamping member 312 in a longitudinal direction, the base 10 has at least one connecting groove, and the horizontal positioning assembly 31 further includes a connecting member, which connects the connecting hole 313 and the connecting groove for fixing, and the opening area of ​​the connecting hole 313 is larger than the opening area of ​​the connecting groove. This arrangement provides a small range of adjustable space for the initial position of the movable clamping member 312, thereby ensuring that the movable clamping member 312 is better abutted against the lens 40.

[0045] Of course, it can also be arranged that a magnetic attraction member extending radially along the base 10 is fixed on the base 10, and the movable clamping member 312 is a magnetic member, and the magnetic attraction member can drive the magnetic member to move radially along the base 10, so that the magnetic member can abut against the outer periphery of the lens 40. This arrangement can reduce the use of connecting parts and the size of the space occupied, and improve the processing efficiency.

[0046] like Figure 1 and Figure 2 As shown, the longitudinal positioning assembly 32 includes a clamping portion 321 and a connecting portion 322. One end of the clamping portion 321 can abut against the non-effective diameter of the side of the lens 40 away from the base 10; the connecting portion 322 is fixed to the base 10, and one end of the clamping portion 321 away from the lens 40 is rotatably connected to the connecting portion 322, so that the clamping portion 321 can rotate on a horizontal plane parallel to the base 10. By setting the clamping portion 321 to rotate on the connecting portion 322, it is avoided that the lens 40 is placed and the installation of the lens 40 is affected by the obstruction. After the position of the lens 40 on the horizontal plane is determined, the clamping portion 321 is rotated to abut against the non-effective diameter of the lens 40, so as to limit the lens 40 in the vertical direction, ensure the fixing effect of the lens 40, and at the same time, will not block the effective diameter of the lens 40.

[0047] like Figure 1 and Figure 2As shown, the connecting portion 322 includes a fixed column 323, an extension rod 324, a connecting rod 325 and a limiting nut 326, the fixed column 323 is upright on the base 10; one end of the extension rod 324 is fixed on the fixed column 323, and the extension rod 324 extends in a direction parallel to the base 10; the connecting rod 325 passes through one end of the extension rod 324 away from the fixed column 323, and the connecting rod 325 extends in a direction perpendicular to the base 10, and the clamping portion 321 is rotatably connected to the connecting rod 325; the limiting nut 326 is located on the side of the clamping portion 321 away from the extension rod 324, and the limiting nut 326 can be rotated on the connecting rod 325 so that the clamping portion 321 is limited between the limiting nut 326 and the extension rod 324. By extending the extension rod 324 outward in the horizontal direction and the connecting rod 325 extending vertically, the rotation axis of the clamping portion 321 is limited at the connecting rod 325, providing a larger rotation space for the clamping portion 321, which is convenient for flexible operation.

[0048] like Figure 1 As shown, the limiting mechanism 30 also includes a plurality of supporting structures 33, which are arranged at intervals, and the supporting structures 33 abut against the non-effective diameter of the side of the lens 40 facing the base 10, and the height difference of all the supporting structures 33 is less than 1 micron. By reasonably adjusting the position and height of the supporting structure 33, a supporting structure is provided on the side of the lens 40 close to the base 10, further avoiding the interference between the surface of the side of the lens 40 close to the base 10 and the base 10, and at the same time, the height difference of each supporting structure 33 is accurately controlled to avoid errors in the measurement of the lens 40.

[0049] Optionally, the lens surface shape detection jig is fixed to the machine base of the non-contact three-dimensional optical profiler through a plurality of threaded holes 50 .

[0050] The working process of the lens surface shape detection fixture of the present application is as follows: before the surface shape detection, the lens surface shape detection fixture is first fixed on the machine base of the non-contact three-dimensional optical profiler. The probe of the non-contact three-dimensional optical profiler first tests the reference ball 21 and the positioning ring 22 at the center of the fixture. After the position and posture of the fixture are adjusted according to the detection results, the position and posture are no longer changed. The lens sample to be tested is directly placed at the center of the fixture, and the longitudinal positioning component 32 is used to press the outer contour of the sample to be tested. Be careful not to press the effective diameter part of the sample to be tested. After the sample is placed, the non-contact three-dimensional optical profiler is controlled to directly perform surface shape detection of the sample to be tested. After the test is completed, the test result is output, which is the absolute measurement result of the sample to be tested.

[0051] Using the lens surface shape detection fixture provided in this application, the VR lens surface shape can be tested with a common reference. The surface shape detection reference is the same as the supporting reference. The test result is more in line with the actual situation and represents the real surface shape of the lens. It can more accurately guide the mold repair, reduce the number of mold repairs, and reduce product development costs.

[0052] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0053] 1. The lens surface shape detection jig of the present application uses the light signal emitted by the central axis of the non-contact three-dimensional optical profiler to adjust the position of the lens surface shape detection jig so that the reference positioning mechanism 20 located at the center of the base 10 reflects the light signal, thereby realizing a common reference between the lens surface shape detection jig and the non-contact three-dimensional optical profiler. In this way, when detecting the lens surface shape, the influence of the existing eccentricity and tilt of the lens 40 on the measurement result can be avoided, and the actual state of the lens 40 can be directly tested to ensure absolute measurement.

[0054] 2. The limiting mechanism 30 is used to limit the lens 40 in the directions perpendicular and parallel to the base 10 to avoid errors caused by the position change of the lens 40 during the measurement process and ensure accurate measurement results.

[0055] 3. At least a portion of the horizontal positioning component 31 abuts against the outer periphery of the lens 40 to fix the lens 40 in the horizontal direction; at least a portion of the longitudinal positioning component 32 abuts against the non-effective diameter of the lens 40 to fix the lens 40 in the height direction. The horizontal positioning component 31 and the longitudinal positioning component 32 abut against the side and outer periphery of the non-effective diameter to fix the lens 40, ensuring that the position of the lens 40 is stable and does not deviate.

[0056] 4. During the test, the spatial position of the lens surface shape detection fixture can be determined by scanning the reference ball 21 and the positioning ring 22 through the equipment, and the fixture position can be adjusted according to the light signal and the reflection signal.

[0057] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lens surface shape detection jig, characterized in that: The lens surface shape detection jig is used to be fixed on a non-contact three-dimensional optical profilometer, and the lens surface shape detection jig includes: A base (10), wherein the base (10) can be fixed on the non-contact three-dimensional optical profilometer; A reference positioning mechanism (20), the reference positioning mechanism (20) being arranged at the center of the base (10), and at least a portion of the reference positioning mechanism (20) being capable of reflecting a light signal emitted along the central axis of the non-contact three-dimensional optical profiler, so that the lens surface shape detection fixture and the non-contact three-dimensional optical profiler have a common reference; A limiting mechanism (30), wherein the limiting mechanism (30) is arranged on the base (10), and is used to fix the position of a lens (40) so that the lens (40) is located at the center of the base (10); at least a portion of the limiting mechanism (30) contacts a non-effective diameter portion of the lens (40) so as to fix the lens (40) in a direction perpendicular to the base (10); and at least another portion of the limiting mechanism (30) contacts an outer peripheral edge of the lens (40) so as to fix the lens (40) in a plane parallel to the base (10).

2. The lens surface shape detection jig according to claim 1, characterized in that: The reference positioning mechanism (20) comprises a reference ball (21), a receiving groove is provided at the center of the base (10), the reference ball (21) is placed in the receiving groove, the reference ball (21) has a positioning point, and the non-contact three-dimensional optical profiler can receive the light signal reflected by the positioning point, so that the lens surface shape detection fixture and the non-contact three-dimensional optical profiler have a common reference.

3. The lens surface shape detection jig according to claim 2, characterized in that: The reference positioning mechanism (20) further comprises a positioning ring (22), wherein the positioning ring (22) is arranged around the edge of the base (10), the limiting mechanism (30) is located inside the positioning ring (22), and the positioning ring (22) has a protrusion (221) extending along the axial direction of the positioning ring (22) so as to locate the spatial position of the lens surface shape detection fixture.

4. The lens surface shape detection jig according to claim 3, characterized in that: The width of the positioning ring (22) is greater than or equal to 2 mm.

5. The lens surface shape detection jig according to claim 1, characterized in that: The limiting mechanism (30) comprises: a horizontal positioning component (31), at least a portion of which abuts against an outer peripheral edge of the lens (40) to fix the lens (40) in a horizontal direction; At least three longitudinal positioning components (32), at least a portion of which abuts against the non-effective diameter of the lens (40) to fix the lens (40) in the height direction.

6. The lens surface shape detection jig according to claim 5, characterized in that: The horizontal positioning assembly (31) comprises at least two horizontal limiting members (311), the horizontal limiting members (311) being fixed on the base (10), the extension directions of the two horizontal limiting members (311) being perpendicular, and the side of the horizontal limiting member (311) close to the center of the base (10) abutting against the outer peripheral edge of the lens (40).

7. The lens surface shape detection jig according to claim 6, characterized in that: The horizontal positioning assembly (31) further comprises at least one movable clamping member (312), wherein the movable clamping member (312) is capable of moving along the radial direction of the base (10) to clamp the outer periphery of the lens (40).

8. The lens surface shape detection jig according to claim 7, characterized in that: The number of the movable clamping parts (312) is at least two, a line connecting at least one of the horizontal limiting parts (311) and the movable clamping part (312) is a first line, a line connecting at least another of the horizontal limiting parts (311) and another of the movable clamping parts (312) is a second line, and the first line and the second line are perpendicular to each other.

9. The lens surface shape detection jig according to claim 7, characterized in that: A positioning groove is provided on the base (10), and at least a portion of the movable clamping member (312) is located in the positioning groove and is elastically connected to the positioning groove, so that the movable clamping member (312) can move radially along the base (10).

10. The lens surface shape detection jig according to claim 7, characterized in that: A magnetic attraction component extending radially along the base (10) is fixed on the base (10); the movable clamping component (312) is a magnetic component; the magnetic attraction component can drive the magnetic component to move radially along the base (10) so that the magnetic component can abut against the outer peripheral edge of the lens (40).

11. The lens surface shape detection jig according to claim 5, characterized in that: The longitudinal positioning assembly (32) comprises: A clamping portion (321), one end of which is capable of abutting against a non-effective diameter of a side of the lens (40) away from the base (10); A connecting portion (322), wherein the connecting portion (322) is fixed on the base (10), and one end of the clamping portion (321) away from the lens (40) is rotatably connected to the connecting portion (322), so that the clamping portion (321) can rotate on a horizontal plane parallel to the base (10).

12. The lens surface shape detection jig according to claim 11, characterized in that: The connecting portion (322) comprises: A fixing column (323), wherein the fixing column (323) is vertically disposed on the base (10); an extension rod (324), one end of the extension rod (324) being fixed on the fixing column (323), and the extension rod (324) extending in a direction parallel to the base (10); A connecting rod (325), the connecting rod (325) passing through an end of the extension rod (324) away from the fixing column (323), the connecting rod (325) extending in a direction perpendicular to the base (10), and the clamping portion (321) being rotatably connected to the connecting rod (325); A limiting nut (326), wherein the limiting nut (326) is located on a side of the clamping portion (321) away from the extension rod (324), and the limiting nut (326) can be rotated on the connecting rod (325) so that the clamping portion (321) is limited between the limiting nut (326) and the extension rod (324).

13. The lens surface shape detection jig according to any one of claims 1 to 12, characterized in that: The limiting mechanism (30) further comprises a plurality of supporting structures (33), wherein the plurality of supporting structures (33) are arranged at intervals, the supporting structures (33) abut against the non-effective diameter of the lens (40) on one side facing the base (10), and the height difference of all the supporting structures (33) is less than 1 micron.

Images