Lens detection tool, lens internal stress detection method, medium and product

Abstract

The invention discloses a lens detection tool, a lens internal stress detection method, a medium and a product, and relates to the technical field of optics. The transparent shell is connected with the transparent base to form an inner cavity, and the transparent shell is used for fixing a lens to be detected in the inner cavity; the lens detection tool is used for soaking a to-be-detected lens fixed in the inner cavity in the matched target transparent refraction liquid so as to detect the lens internal stress corresponding to the to-be-detected lens. According to the invention, the technical effect of obtaining the accurate internal stress of the lens is achieved.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a lens detection tool, a method for detecting internal stress of a lens, a storage medium, and a computer program product. Background Art

[0002] With the continuous development of optical technology, more and more technicians are using Pancake optics to obtain smaller lens devices with better imaging. However, when using Pancake optics, an injection molding process is required to obtain an aspheric plastic lens. As a result, there is usually significant stress birefringence inside the aspheric plastic lens, which in turn affects the imaging results of the lens.

[0003] In the related technology, technicians usually control the light source equipment to emit light, so that the light passes through the polarizer, the lens to be tested, and the analyzer in sequence. The technicians then detect the brightness changes caused by the analyzer to determine the internal stress of the aspheric plastic lens, and judge whether the aspheric plastic lens meets the process standards based on the internal stress of the lens.

[0004] However, the surface of the aspheric plastic lens has a certain curvature, and when the light passes through the aspheric plastic lens, its propagation path will be disturbed by the curvature and deflected. As a result, when the technicians detect the brightness changes produced by the polarizer, the results obtained not only include the influence of the internal stress of the lens on the light, but also the influence of the curvature of the lens surface on the light, which makes the accuracy of the detection result low. Summary of the invention

[0005] The main purpose of the present application is to provide a lens detection tool, a method for detecting lens internal stress, a storage medium and a computer program product, aiming to solve the technical problem of low accuracy of the detection results of lens internal stress in the related art.

[0006] To achieve the above objectives, the present application proposes a lens inspection tool, which includes:

[0007] Transparent base;

[0008] A transparent shell connected to the transparent base to form an inner cavity, wherein the transparent shell is used to fix the lens to be tested in the inner cavity;

[0009] The lens detection tool is used to immerse the lens to be tested fixed in the inner cavity in a matching target transparent refractive liquid to detect the internal stress of the lens corresponding to the lens to be tested.

[0010] In one embodiment, the lens inspection tool further comprises a refractive liquid injection module, and the refractive liquid injection module is connected to the transparent shell;

[0011] The refractive liquid injection module comprises a pipeline, which is used to inject a target transparent refractive liquid matching the lens to be tested into the inner cavity through the pipeline, so that the lens to be tested is immersed in the target transparent refractive liquid.

[0012] In one embodiment, the lens inspection tool further comprises a refractive liquid storage box;

[0013] The refractive liquid storage box is connected to the refractive liquid injection module via a pipeline, and the refractive liquid storage box is used to transport the transparent refractive liquid stored in the refractive liquid storage box to the refractive liquid injection module via the pipeline.

[0014] In one embodiment, the lens inspection tool further comprises a light source device;

[0015] The light source device is arranged below the transparent base and is used for emitting natural light to the lens to be tested.

[0016] In one embodiment, the lens inspection tool further comprises a polarizer;

[0017] The polarizer is arranged between the transparent base and the light source device, and is used for changing the natural light emitted by the light source device into linear polarized light.

[0018] In one embodiment, the lens detection tooling further comprises a polarizer and a charge coupled device;

[0019] The polarizer is arranged above the lens to be tested, and is used to collect the linearly polarized light passing through the lens to be tested, and reflect the change of the polarization state of the linearly polarized light through the change of its own brightness;

[0020] The charge coupled device is arranged above the polarizer and is used to detect the polarizer to determine the brightness change parameter generated on the polarizer.

[0021] In addition, to achieve the above-mentioned purpose, the present application also proposes a method for detecting internal stress of a lens, the method for detecting internal stress of a lens is applied to the lens detection tool as described above, and the method for detecting internal stress of a lens comprises:

[0022] Determining lens material information corresponding to the lens to be tested, and determining a target transparent refractive liquid matching the lens to be tested according to the lens material information;

[0023] Injecting the target transparent refractive liquid into the inner cavity of the transparent housing, and controlling the light source device to emit natural light when the surface of the lens to be tested is immersed in the target transparent refractive liquid;

[0024] Detecting the polarizer to determine a brightness change parameter, wherein the brightness change parameter is a brightness change parameter generated on the polarizer after the natural light passes through the polarizer, the lens to be tested, and the polarizer in sequence;

[0025] The internal stress of the lens corresponding to the lens to be tested is determined according to the brightness change parameter.

[0026] In one embodiment, the step of determining a target transparent refractive liquid matching the lens to be tested according to the lens material information comprises:

[0027] Determining a plurality of preset lens materials and a plurality of preset refractive indices that match the preset lens materials;

[0028] Screening each of the preset lens materials based on the lens material information to determine a target preset lens material that matches the lens material information;

[0029] A target preset refractive index corresponding to the target preset lens material is determined, and a target transparent refractive fluid matching the lens to be tested is determined according to the target preset refractive index.

[0030] In one embodiment, the step of determining the internal stress of the lens corresponding to the lens to be tested according to the brightness change parameter includes:

[0031] Determine a polarization state change parameter corresponding to the linearly polarized light passing through the analyzer according to the brightness change parameter;

[0032] The phase delay of the linearly polarized light is determined based on the polarization state change parameter, and the internal stress of the lens corresponding to the lens to be tested is determined according to the phase delay.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the method for detecting internal stress of a lens as described above are implemented.

[0034] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the method for detecting internal stress of a lens as described above are implemented.

[0035] The lens detection tooling provided in the embodiment of the present application includes: a transparent base; a transparent shell connected to the transparent base to form an inner cavity, and the transparent shell is used to fix the lens to be tested in the inner cavity; the lens detection tooling is used to immerse the lens to be tested fixed in the inner cavity in a matching target transparent refractive liquid to detect the internal stress of the lens corresponding to the lens to be tested.

[0036] In this embodiment, the lens detection tool comprises: a transparent base and a transparent shell, wherein the transparent shell and the transparent base are connected to form an inner cavity, and the lens to be tested can be fixed in the inner cavity through the transparent shell, and the lens to be tested is completely immersed in a matching target transparent refractive liquid. During the operation of the lens detection tool, the lens to be tested is first fixed in the inner cavity, and the target transparent refractive liquid matching the lens to be tested is completely immersed in the lens to be tested, so that the refractive index of the target transparent refractive liquid can eliminate the light refraction phenomenon caused by the curvature of the surface of the lens to be tested, and then the light can leave the surface of the lens to be tested without additional refraction.

[0037] In this way, the present application solves the technical problem of low accuracy of the detection results of the internal stress of the lens in the related art. That is, the present application fixes the lens to be tested in the inner cavity of the lens detection tooling, and injects a target transparent refractive liquid that matches the lens to be tested into the inner cavity to cover the lens to be tested, so that the additional refraction of the light caused by the curvature of the lens surface is offset by the target transparent refractive liquid, and then the brightness change generated on the analyzer can only reflect the refraction effect of the internal stress of the lens on the light, thereby achieving the technical effect of being able to obtain accurate internal stress of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 This is a schematic diagram of the structure of the lens inspection tooling for this application;

[0041] Figure 2 This is a schematic diagram of light refraction of a flat lens involved in an embodiment of the lens inspection tooling of the present application;

[0042] Figure 3A schematic diagram of light refraction of an aspheric plastic lens involved in an embodiment of a lens inspection tool of the present application;

[0043] Figure 4 A schematic diagram of light refraction correction involved in an embodiment of the lens inspection tooling of the present application;

[0044] Figure 5 A schematic diagram of a flow chart of a first embodiment of a method for detecting internal stress of a lens of the present application;

[0045] Figure 6 Schematic diagram of the device structure of the hardware operating environment involved in the method for detecting internal stress of a lens in an embodiment of the present application.

[0046] Description of Figure Numbers:

[0047] 1. Transparent base; 2. Transparent shell; 3. Lens to be tested; 4. Refractive liquid injection module; 5. Pipeline; 6. First refractive liquid storage box; 7. Second refractive liquid storage box; 8. Third refractive liquid storage box; 9. First one-way valve; 10. Second one-way valve; 11. Third one-way valve; 12. Light source equipment; 13. Polarizer; 14. Analyzer; 15. Charge coupled device; 16. Bracket.

[0048] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0050] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0051] It should be noted that for ease of description, please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the lens inspection tooling for this application, such as Figure 1 As shown, the following is explained with a lens detection tooling configured with a transparent base 1, a transparent shell 2, a light source device 12, a refractive liquid injection module 4, a refractive liquid storage box 6-8, a polarizer 13, an analyzer 14, a CCD (Charge-Coupled Device) 15, or a mobile terminal, a data storage control terminal, a PC and other terminals connected to an electronic control unit matching the lens detection tooling as the execution subject.

[0052] Based on the above-mentioned lens inspection tooling, the overall concept of the lens inspection tooling of the present application is provided.

[0053] With the continuous development of optical technology, more and more technicians are adopting Pancake optical solutions to obtain lens devices with smaller size and better imaging. However, when using the Pancake optical solution, it is necessary to use an injection molding process to obtain an aspheric plastic lens. In this way, there is usually a significant stress birefringence phenomenon inside the aspheric plastic lens, which in turn affects the imaging result of the lens. In related technologies, technicians usually control the light source equipment to emit light, so that the light passes through the polarizer, the lens to be tested, and the analyzer in turn. The technicians then detect the brightness changes caused by the analyzer to determine the internal stress of the aspheric plastic lens, and judge whether the aspheric plastic lens meets the process standards based on the internal stress of the lens. However, please refer to Figure 2 and Figure 3 ,in, Figure 2 This is a schematic diagram of light refraction of a flat lens involved in an embodiment of the lens detection tooling of the present application, Figure 3 FIG. 1 is a schematic diagram of light refraction of an aspheric plastic lens according to an embodiment of the lens inspection tool of the present application. Figure 2 and Figure 3 As shown, compared with a flat lens, the surface of an aspheric plastic lens has a certain curvature. When light passes through the aspheric plastic lens, its propagation path will be disturbed by the curvature and thus deflected. As a result, when technicians detect the brightness changes produced by the analyzer, the results obtained include not only the influence of the internal stress of the lens on the light, but also the influence of the curvature of the lens surface on the light, which makes the accuracy of the detection result low.

[0054] In view of the above phenomenon, the present application provides a lens inspection tool, which includes: a transparent base; a transparent shell connected to the transparent base to form an inner cavity, and the transparent shell is used to fix the lens to be tested in the inner cavity and immerse the lens to be tested in a matching target transparent refractive liquid.

[0055] In this way, the present application solves the technical problem of low accuracy of the detection results of the internal stress of the lens in the related art. That is, the present application fixes the lens to be tested in the inner cavity of the lens detection tooling, and injects a target transparent refractive liquid that matches the lens to be tested into the inner cavity to cover the lens to be tested, so that the additional refraction of the light caused by the curvature of the lens surface is offset by the target transparent refractive liquid, and then the brightness change generated on the analyzer can only reflect the refraction effect of the internal stress of the lens on the light, thereby achieving the technical effect of being able to obtain accurate internal stress of the lens.

[0056] Based on the overall concept of the lens inspection tool of the present application, various embodiments of the lens inspection tool of the present application are further proposed. In this embodiment, the lens inspection tool includes:

[0057] Transparent base;

[0058] A transparent shell connected to the transparent base to form an inner cavity, wherein the transparent shell is used to fix the lens to be tested in the inner cavity;

[0059] The lens detection tool is used to immerse the lens to be tested fixed in the inner cavity in a matching target transparent refractive liquid to detect the internal stress of the lens corresponding to the lens to be tested.

[0060] Specifically, Figure 1 As shown, the lens detection tooling includes: a transparent base 1 and a transparent shell 2, wherein the transparent base 1 and the transparent shell 2 are connected, so that an inner cavity is formed by the inner wall of the transparent shell 2 and the upper surface of the transparent base 1, so that the lens 3 to be tested, which needs to detect the internal stress, is fixed in the inner cavity through the inner wall of the transparent shell, and then the surface of the lens 3 to be tested is completely immersed in the target transparent refractive liquid 16 contained in the inner cavity and matched with the lens to be tested.

[0061] It should be noted that the transparent base 1 and the transparent shell 2 are made of glass as a whole. It is understandable that glass has a high transmittance and is basically stress-free inside. Therefore, in the process of detecting the internal stress of the lens 3 to be tested, the use of a base and a shell made of glass can avoid large refraction of light before entering the lens to be tested.

[0062] Furthermore, in a feasible embodiment, the lens inspection tool further comprises a refractive liquid injection module, and the refractive liquid injection module is connected to the transparent shell;

[0063] The refractive liquid injection module comprises a pipeline, which is used to inject a target transparent refractive liquid matching the lens to be tested into the inner cavity through the pipeline, so that the lens to be tested is immersed in the target transparent refractive liquid.

[0064] Specifically, Figure 1 As shown, the lens inspection tooling also includes a refractive liquid injection module 4, which is connected to the transparent housing 2, wherein the refractive liquid injection module 4 itself is provided with a pipeline 5, and can inject the target transparent refractive liquid matching the lens to be tested into the inner cavity where the lens to be tested 3 is fixed through the pipeline 5, and then soak the lens to be tested 3 with the target transparent refractive liquid to avoid more contact between the surface of the lens to be tested 3 and the air. It should be noted that the refractive index of the target transparent refractive liquid ranges from 1.4 to 1.6. It can be understood that as the lens material used by the lens to be tested is different, transparent refractive liquids with different refractive indices need to be used to eliminate the refraction effect of the surface curvature of the lens to be tested on the light.

[0065] Furthermore, in a feasible embodiment, the lens inspection tool further comprises a refractive liquid storage box;

[0066] The refractive liquid storage box is connected to the refractive liquid injection module via a pipeline, and the refractive liquid storage box is used to transport the transparent refractive liquid stored in the refractive liquid storage box to the refractive liquid injection module via the pipeline.

[0067] Specifically, the lens testing tooling is further provided with at least one refractive liquid storage box, which is provided with a pipeline and connected to the refractive liquid injection module through the pipeline. The refractive liquid storage box injects the transparent refractive liquid stored in its own box into the refractive liquid injection module through the pipeline, so that the refractive liquid injection module injects the transparent refractive liquid into the inner cavity where the lens to be tested is fixed.

[0068] It should be noted that, in this embodiment and another embodiment, Figure 1 As shown, when the number of refractive liquid storage boxes is 3, refractive liquid storage boxes 6, 7, and 8 are each provided with a pipeline, and the pipeline of refractive liquid storage box 6 is provided with a one-way valve 9. Similarly, the pipeline of refractive liquid storage box 7 is provided with a one-way valve 10. Similarly, the pipeline of refractive liquid storage box 8 is provided with a one-way valve 11. The lens detection tooling can control the opening and closing of each one-way valve to control the refractive liquid storage boxes 6-8 to input transparent refractive liquid into the refractive liquid injection module 4.

[0069] Furthermore, in a feasible embodiment, the lens inspection tool further comprises a light source device;

[0070] The light source device is arranged below the transparent base and is used for emitting natural light to the lens to be tested.

[0071] Specifically, Figure 1 As shown, the lens inspection tooling also includes a light source device 12, which is fixed on a bracket 16, wherein the light source device 12 is arranged below the transparent base 1, and is used to emit natural light to the lens 3 to be tested when the lens 3 to be tested is being tested.

[0072] Furthermore, in a feasible embodiment, the lens inspection tool further comprises a polarizer;

[0073] The polarizer is arranged between the transparent base and the light source device, and is used for changing the natural light emitted by the light source device into linear polarized light.

[0074] Specifically, Figure 1As shown, the lens detection tooling also includes a polarizer 13, which is fixed on a bracket 16, wherein the polarizer 13 is fixed between the light source device 12 and the transparent base 1, and is used to receive natural light emitted by the light source device and change the polarization state of the natural light to convert the natural light into linearly polarized light, thereby allowing the linearly polarized light to continue to penetrate the lens 3 to be tested.

[0075] It should be noted that the linearly polarized light is the light whose light vector vibrates only along a fixed direction. It can be understood that after receiving natural light, the polarizer 13 can selectively absorb or change the vibration direction of the light according to the characteristics of the polarizer configured by itself, so that only the light that matches the structure of the polarizer can pass through the polarizer, so that the natural light is converted into linear polarized light with a specific polarization direction after passing through the polarizer 13.

[0076] Furthermore, in a feasible embodiment, the lens detection tooling further comprises a polarizer and a charge coupled device;

[0077] The polarizer is arranged above the lens to be tested, and is used to collect the linearly polarized light passing through the lens to be tested, and reflect the change of the polarization state of the linearly polarized light through the change of its own brightness;

[0078] The charge coupled device is arranged above the polarizer and is used to detect the polarizer to determine the brightness change parameter generated on the polarizer.

[0079] Specifically, Figure 1 As shown, the lens detection tooling also includes a polarizer 14 and a CCD 15, and the polarizer 14 and the CCD 15 are each fixed on a bracket 16, wherein the polarizer 14 is arranged above the lens to be tested, so as to collect the linearly polarized light passing through the lens to be tested, and then reflect the polarization state change of the linearly polarized light when passing through the lens to be tested 3 through its own brightness change; in addition, the CCD 15 is arranged above the polarizer 14, and is used to identify the polarizer 14, so as to determine the brightness change parameters generated by the polarizer 14, and then the lens detection tooling can calculate the internal stress of the lens to be tested according to the brightness change parameters.

[0080] Thus, the present application solves the technical problem of low accuracy of the detection result of the internal stress of the lens in the related art, that is, please refer to Figure 4 , Figure 4 FIG. 1 is a schematic diagram of light refraction correction involved in an embodiment of the lens inspection tooling of the present application, as shown in FIG. Figure 4As shown, the present application fixes the lens to be tested in the inner cavity of the lens detection tooling, and injects a target transparent refractive liquid that matches the lens to be tested into the inner cavity, so as to cover the lens to be tested, so that the additional refraction of light caused by the curvature of the lens surface is offset by the target transparent refractive liquid, and then the brightness change produced on the analyzer can only reflect the refraction effect of the internal stress of the lens on the light, thereby achieving the technical effect of being able to obtain accurate internal stress of the lens.

[0081] Based on the above lens detection tooling and the overall concept of the present application, various embodiments of the method for detecting internal stress of the lens of the present application are further proposed. Figure 5 , Figure 5 This is a schematic flow chart of a first embodiment of a method for detecting internal stress of a lens of the present application.

[0082] It should be understood that although the logical order is shown in the flowchart, in some cases, the method for detecting internal stress of the lens of the present application can also perform the steps shown or described in a different order than that here. In this embodiment, the method for detecting internal stress of the lens of the present application is applied to the above-mentioned lens detection tooling, such as Figure 5 As shown, the method for detecting internal stress of a lens of the present application may include steps S10 to S40:

[0083] Step S10: determining lens material information corresponding to the lens to be tested, and determining a target transparent refractive liquid matching the lens to be tested according to the lens material information;

[0084] Step S20: injecting the target transparent refractive liquid into the inner cavity of the transparent housing, and controlling the light source device to emit natural light when the surface of the lens to be tested is immersed in the target transparent refractive liquid;

[0085] Step S30: testing the analyzer to determine a brightness change parameter, wherein the brightness change parameter is a brightness change parameter generated on the analyzer after the natural light passes through the polarizer, the lens to be tested, and the analyzer in sequence;

[0086] Step S40: determining the internal stress of the lens corresponding to the lens to be tested according to the brightness change parameter.

[0087] In this embodiment, when the lens to be tested is fixed in the inner cavity of the lens detection tooling, the lens detection tooling first receives a lens detection instruction and determines the lens material information carried in the lens detection instruction. The lens detection tooling then determines the target transparent refractive liquid used to soak the lens to be tested according to the lens material information. After that, the lens detection tooling obtains the target transparent refractive liquid from multiple refractive liquid storage boxes through the above-mentioned refractive liquid injection module, and controls the refractive liquid injection module to inject the target refractive liquid into the inner cavity of the transparent shell, so that the target transparent refractive liquid completely soaks the lens to be tested. At the same time, the lens detection tooling controls the light source device configured by itself to emit natural light to the lens to be tested, so that the natural light passes through the polarizer above the light source device, the lens to be tested and the analyzer in turn. After that, the lens detection tooling calls the charge coupled device configured above the analyzer to identify the analyzer, so as to determine the brightness change parameters generated by the analyzer during operation. Finally, the lens detection tooling calculates the lens internal stress corresponding to the lens to be tested according to the brightness change parameters.

[0088] Exemplarily, for example, when the lens 3 to be tested is fixed in the inner cavity of the lens detection tooling, the technician first sends a lens detection instruction to the lens detection tooling through the control module. At this time, the lens detection tooling receives the lens detection instruction and reads the lens material information contained in the lens detection instruction. The lens detection tooling then screens a plurality of different transparent refractive liquids stored in itself according to the lens material information to determine the target transparent refractive liquid that matches the transparent material information. Afterwards, the transparent detection tooling controls the refractive liquid storage box storing the target transparent refractive liquid to open the one-way valve on the pipeline connected to the refractive liquid storage box, so that the target transparent refractive liquid flows from the refractive liquid storage box through the pipeline into the refractive liquid injection module 4, and the refractive liquid injection module 4 injects the target transparent refractive liquid into the refractive liquid storage box. Bright refractive liquid is injected into the inner cavity of the transparent shell so that the target transparent refractive liquid completely covers the lens 3 to be tested. At the same time, the transparent detection tooling controls the light source device 12 configured by itself to make the light source device 12 run and emit natural light, so that the natural light penetrates the polarizer 13 arranged above the light source device and is converted into linearly polarized light. After leaving the polarizer 13, the linearly polarized light continues to penetrate the lens 3 to be tested, and after passing through the lens 3 to be tested, it continues to enter the analyzer 14 arranged above the lens to be tested. After that, the lens detection tooling calls the CCD 15 configured above the analyzer 14 to identify the analyzer to determine the brightness change parameters generated by the analyzer 14 during the rotation process. Finally, the lens detection tooling calculates the internal stress in the lens to be tested based on the brightness change parameters.

[0089] In this way, the present application solves the technical problem of low accuracy of the detection results of the internal stress of the lens in the related art. That is, the present application fixes the lens to be tested in the inner cavity of the lens detection tooling, and injects a target transparent refractive liquid that matches the lens to be tested into the inner cavity to cover the lens to be tested, so that the additional refraction of the light caused by the curvature of the lens surface is offset by the target transparent refractive liquid, and then the brightness change generated on the analyzer can only reflect the refraction effect of the internal stress of the lens on the light, thereby achieving the technical effect of being able to obtain accurate internal stress of the lens.

[0090] Further, in a feasible embodiment, the step of "determining a target transparent refractive liquid matching the lens to be tested according to the lens material information" in the above step S10 may specifically include steps S101 to S103:

[0091] Step S101: determining a plurality of preset lens materials and preset refractive indices that match the plurality of preset lens materials;

[0092] Step S102: screening each of the preset lens materials based on the lens material information to determine a target preset lens material that matches the lens material information;

[0093] Step S103: determining a target preset refractive index corresponding to the target preset lens material, and determining a target transparent refractive liquid matching the lens to be tested according to the target preset refractive index.

[0094] In this embodiment, after determining the lens material information corresponding to the lens to be tested, the lens detection tooling first reads the storage module configured by itself to obtain multiple preset lens materials and preset refractive indices that match the multiple preset lens materials. Then, the lens detection tooling screens the multiple preset lens materials according to the lens material information to determine the target preset lens material that matches the lens material information. Finally, the lens detection tooling determines the target preset refractive index that matches the target preset lens material, and based on the target preset refractive index, determines the target transparent refractive liquid for immersing the lens to be tested from among the multiple preset transparent refractive liquids.

[0095] Exemplarily, for example, when the lens inspection tool determines that the lens material information corresponding to the lens to be tested is PMMA (polymethyl methacrylate), the lens inspection tool first reads the storage module configured by itself to obtain a refractive liquid mapping table containing multiple preset lens materials and preset refractive indices that match each of the multiple preset lens materials. Afterwards, the lens inspection tool queries the refractive liquid mapping table based on PMMA to compare PMMA with the multiple preset lens materials respectively, thereby screening out the target preset lens material that matches PMMA from the multiple preset lens materials according to the comparison results. Finally, the lens inspection tool determines the first preset refractive index that matches the target preset lens material in the refractive liquid mapping table as the first target preset refractive index, and determines, based on the first target preset refractive index, a preset transparent refractive liquid with a refractive index of the first preset refractive index from a plurality of preset transparent refractive liquids as the target transparent refractive liquid for covering the lens to be inspected.

[0096] Similarly, when the lens inspection tool determines that the lens material information corresponding to the lens to be tested is PC (polycarbonate), it can query the refractive liquid mapping table based on PC, so as to determine the second preset refractive index as the second target preset refractive index matching the PC among the multiple preset refractive indices contained in the refractive liquid mapping table, and determine the preset transparent refractive liquid with a refractive index of the second preset refractive index among the multiple preset transparent refractive liquids based on the second target preset refractive index, as the target transparent refractive liquid used to cover the lens to be inspected.

[0097] In this way, during the process of testing the lens to be tested, the lens testing tooling can screen out a transparent refractive liquid that matches the refractive index of the lens to be tested, thereby ensuring that after the linear polarized light passes through the lens to be tested, the refractive index of the transparent refractive liquid can eliminate the refraction effect of the surface curvature of the lens to be tested on the linear polarized light, thereby making the polarization state change recognized by the lens testing tooling only reflect the internal stress of the lens to be tested, further improving the accuracy of the test results.

[0098] Furthermore, in a feasible embodiment, the above step S40 may specifically include steps S401 to S402:

[0099] Step S401: determining a polarization state change parameter corresponding to the linearly polarized light passing through the analyzer according to the brightness change parameter;

[0100] Step S402: determining the phase delay of the linearly polarized light based on the polarization state change parameter, and determining the internal stress of the lens corresponding to the lens to be tested according to the phase delay.

[0101] In this embodiment, after identifying the brightness change parameters, the lens detection tooling first calculates the polarization state change parameters corresponding to the linear polarized light passing through the analyzer according to the direction of the brightness change parameters. Then, the lens detection tooling determines the phase delay corresponding to the linear polarized light according to the polarization state change parameters, and then calculates the corresponding internal stress of the lens inside the lens to be tested according to the phase delay.

[0102] Exemplarily, for example, after the lens detection tool detects the brightness change parameters corresponding to the analyzer through CCD15, it first determines the polarization state transformation parameters generated by the linearly polarized light according to the brightness change parameters. Then, the lens detection tool calculates the phase delay amount corresponding to the linearly polarized light according to the amplitude ratio and phase difference included in the polarization state transformation parameters, and inputs the phase delay amount into the stress relationship mapping model. The stress relationship mapping model infers the phase delay amount according to finite element analysis, iterative algorithm, etc., so as to determine the internal stress of the lens corresponding to the inside of the lens to be tested.

[0103] It should be noted that the stress relationship mapping model can be based on the principle of photoelastic effect to determine the change in the optical refractive index of the lens to be tested caused by the stress change, thereby constructing a stress relationship mapping model. It is understandable that the specific model structure and model type of the stress relationship mapping model can be set by the technician according to the needs, and this application does not limit this.

[0104] In this way, after obtaining the brightness change parameters of the analyzer, the lens testing tooling can infer the internal stress of the lens to be tested according to the brightness change parameters.

[0105] In addition, the lens inspection tooling provided in the present application also includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for detecting internal stress of the lens in the above-mentioned embodiment one.

[0106] Reference below Figure 6 , which shows a schematic diagram of the structure of a lens detection tool suitable for implementing the embodiment of the present application. The lens detection tool in the embodiment of the present application may include but is not limited to a lens detection tool such as a transparent base, a transparent shell, a light source device, a refractive liquid injection module, a plurality of refractive liquid storage boxes, a light source device, a polarizer, an analyzer, and a CCD, or a mobile terminal, a data storage control terminal, a PC, etc. connected to an electronic control unit supporting the lens detection tool. Figure 6 The lens inspection tool shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0107] like Figure 6As shown, the lens inspection tool may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM) 1004. In RAM 1004, various programs and data required for the operation of the lens inspection tool are also stored. The processing device 1001, ROM 1002, and RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the lens inspection tool to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a lens inspection tool with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0108] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0109] The lens detection tool provided by the present application adopts the lens internal stress detection method in the above embodiment, which can solve the technical problem of low accuracy of the detection result of the lens internal stress in the related art. Compared with the prior art, the beneficial effect of the lens detection tool provided by the present application is the same as the beneficial effect of the lens internal stress detection method provided by the above embodiment, and the other technical features of the lens detection tool are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0110] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0112] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the method for detecting internal stress of a lens in the above-mentioned embodiment.

[0113] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0114] The computer-readable storage medium may be included in the lens inspection tooling; or may exist independently without being assembled into the lens inspection tooling.

[0115] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the lens detection tool, the lens detection tool: determines the lens material information corresponding to the lens to be tested, and determines the target transparent refractive liquid matching the lens to be tested according to the lens material information; injects the target transparent refractive liquid into the inner cavity of the transparent shell, and controls the light source device to emit natural light when the surface of the lens to be tested is immersed in the target transparent refractive liquid; detects the analyzer to determine the brightness change parameter, wherein the brightness change parameter is the brightness change parameter generated on the analyzer after the natural light passes through the polarizer, the lens to be tested, and the analyzer in sequence; and determines the lens internal stress corresponding to the lens to be tested according to the brightness change parameter.

[0116] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0117] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0118] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0119] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned lens internal stress detection method, and can solve the technical problem of low accuracy of the lens internal stress detection result in the related art. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the lens internal stress detection method provided by the above-mentioned embodiment, and will not be repeated here.

[0120] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned method for detecting internal stress of a lens when executed by a processor.

[0121] The computer program product provided by the present application can solve the technical problem of low accuracy of the detection result of the internal stress of the lens in the related art. Compared with the prior art, the beneficial effect of the computer program product provided by the present application is the same as the beneficial effect of the detection method of the internal stress of the lens provided by the above embodiment, which will not be repeated here.

[0122] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A lens inspection tool, characterized in that: The lens detection tooling comprises: Transparent base; A transparent shell connected to the transparent base to form an inner cavity, wherein the transparent shell is used to fix the lens to be tested in the inner cavity; The lens detection tool is used to immerse the lens to be tested fixed in the inner cavity in a matching target transparent refractive liquid to detect the internal stress of the lens corresponding to the lens to be tested.

2. The lens inspection tool as claimed in claim 1, characterized in that: The lens inspection tool further comprises a refractive liquid injection module, and the refractive liquid injection module is connected to the transparent shell; The refractive liquid injection module comprises a pipeline, which is used to inject a target transparent refractive liquid matching the lens to be tested into the inner cavity through the pipeline, so that the lens to be tested is immersed in the target transparent refractive liquid.

3. The lens inspection tool as claimed in claim 2, characterized in that: The lens inspection tooling also includes a refractive liquid storage box; The refractive liquid storage box is connected to the refractive liquid injection module via a pipeline, and the refractive liquid storage box is used to transport the transparent refractive liquid stored in the refractive liquid storage box to the refractive liquid injection module via the pipeline.

4. The lens inspection tool as claimed in claim 1, characterized in that: The lens inspection tooling also includes a light source device; The light source device is arranged below the transparent base and is used for emitting natural light to the lens to be tested.

5. The lens inspection tool as claimed in claim 4, characterized in that: The lens inspection tooling further comprises a polarizer; The polarizer is arranged between the transparent base and the light source device, and is used for changing the natural light emitted by the light source device into linear polarized light.

6. The lens inspection tool as claimed in claim 5, characterized in that: The lens detection tooling also includes a polarizer and a charge coupled device; The polarizer is arranged above the lens to be tested, and is used to collect the linearly polarized light passing through the lens to be tested, and reflect the change of the polarization state of the linearly polarized light through the change of its own brightness; The charge coupled device is arranged above the polarizer and is used to detect the polarizer to determine the brightness change parameter generated on the polarizer.

7. A method for detecting internal stress of a lens, characterized in that: The method for detecting the internal stress of a lens is applied to the lens detection tooling as claimed in any one of claims 1 to 6, and the method for detecting the internal stress of a lens comprises: Determining lens material information corresponding to the lens to be tested, and determining a target transparent refractive liquid matching the lens to be tested according to the lens material information; Injecting the target transparent refractive liquid into the inner cavity of the transparent housing, and controlling the light source device to emit natural light when the surface of the lens to be tested is immersed in the target transparent refractive liquid; Detecting the polarizer to determine a brightness change parameter, wherein the brightness change parameter is a brightness change parameter generated on the polarizer after the natural light passes through the polarizer, the lens to be tested, and the polarizer in sequence; The internal stress of the lens corresponding to the lens to be tested is determined according to the brightness change parameter.

8. The method for detecting internal stress of a lens as claimed in claim 7, characterized in that: The step of determining a target transparent refractive liquid matching the lens to be tested according to the lens material information comprises: Determining a plurality of preset lens materials and a plurality of preset refractive indices that match the preset lens materials; Screening each of the preset lens materials based on the lens material information to determine a target preset lens material that matches the lens material information; A target preset refractive index corresponding to the target preset lens material is determined, and a target transparent refractive fluid matching the lens to be tested is determined according to the target preset refractive index.

9. The method for detecting internal stress of a lens according to claim 7, wherein: The step of determining the internal stress of the lens corresponding to the lens to be tested according to the brightness change parameter comprises: Determine a polarization state change parameter corresponding to the linearly polarized light passing through the analyzer according to the brightness change parameter; The phase delay of the linearly polarized light is determined based on the polarization state change parameter, and the internal stress of the lens corresponding to the lens to be tested is determined according to the phase delay.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the method for detecting internal stress of a lens as described in any one of claims 7 to 9 are implemented.

11. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the method for detecting internal stress of a lens according to any one of claims 7 to 9 are implemented.

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