Optical testing method and device for identifying fly's-eye lens defects and medium

Abstract

The embodiment of the invention provides an optical test method and device for identifying fly-eye lens defects and a medium. The optical test method for identifying fly's-eye lens defects comprises the following steps: enabling parallel light to pass through a fly's-eye lens to be tested and then to be projected to a lens group; focusing the light emitted by the fly's-eye lens through the lens group, so that the light forms a light spot of the fly's-eye lens on a preset imaging surface; comparing the light spot of the fly-eye lens with a standard light spot; and according to a comparison result, identifying whether the fly's-eye lens has defects or not.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical testing technology. More specifically, the embodiments of the present application relate to an optical testing method for identifying defects in a compound eye lens, an optical testing device, and a computer-readable storage medium. Background Art

[0002] The compound eye lens is composed of a series of small lens units, which can effectively improve the uniformity of the light spot and the energy utilization rate, and plays an important role in the lighting systems of various optical machines. The theoretical design of the compound eye lens requires that the parameters such as the curvature of the small lenses on the incident surface and the exit surface are the same, and the center of the lens unit on the incident surface coincides with the center of the corresponding lens unit on the exit surface. However, due to the limitations of the manufacturing process, defects may occur in the compound eye lens during the injection molding or glass molding process, such as relative misalignment of the centers of the small lenses on the incident surface and the exit surface, which will cause the compound eye uniformity effect to deteriorate and even cause dark edges on the screen. Existing physical measurement methods are difficult to accurately measure the misalignment of the lens units mentioned above, so there is a lack of simple and effective material control methods. Summary of the invention

[0003] The purpose of this application is to provide a new technical solution of an optical testing method, device and medium for identifying defects in a compound eye lens.

[0004] In a first aspect, an embodiment of the present application provides an optical testing method for identifying defects in a fly-eye lens, the optical testing method comprising:

[0005] Allow parallel light to pass through the compound eye lens to be tested and then project to the lens group;

[0006] Focusing the light emitted from the compound eye lens through the lens group so that the light forms a light spot of the compound eye lens on a preset imaging surface;

[0007] Comparing the light spot of the fly-eye lens with a standard light spot;

[0008] According to the comparison result, it is identified whether the fly-eye lens has defects.

[0009] Optionally, the step of identifying whether the fly-eye lens has a defect according to the comparison result includes:

[0010] The position of the light spot of the fly-eye lens is compared with the standard light spot to identify whether the light spot of the fly-eye lens is offset relative to the standard light spot.

[0011] Optionally, when the percentage of the center position offset between the light spot of the fly-eye lens and the standard light spot exceeds a preset value, it is determined that the microlens units on two opposite surfaces of the fly-eye lens have a center misalignment defect.

[0012] Optionally, the offset percentage is (P0 / L)*100%, wherein P0 is the offset between the light spot of the fly-eye lens and the center position of the standard light spot in the horizontal direction or the vertical direction, and L is the side length of the light spot of the fly-eye lens;

[0013] The light spot of the compound eye lens and the standard light spot are both rectangular light spots;

[0014] The preset value is 1%.

[0015] Optionally, the step of identifying whether the fly-eye lens has defects according to the comparison result further includes:

[0016] The light spot of the fly-eye lens is compared with the standard light spot in shape and size to identify whether the light spot of the fly-eye lens has a different shape and / or a size deviation relative to the standard light spot.

[0017] Optionally, the optical testing method further comprises:

[0018] The intervals between the lenses in the lens group are adjusted to change the projection distance of the lens group, thereby changing the size of the light spot of the fly-eye lens.

[0019] Optionally, the projection distance is 100 mm to 1000 mm.

[0020] Optionally, the optical testing method further includes:

[0021] Make parallel light pass through a standard fly-eye lens and then project it onto the lens group;

[0022] The lens group focuses the light emitted by the standard fly-eye lens so that the light forms a standard light spot of the standard fly-eye lens on a preset imaging surface.

[0023] In a second aspect, an embodiment of the present application provides an optical testing device, the optical testing device comprising:

[0024] A light source for generating parallel light rays;

[0025] A lens group including at least two spherical lenses;

[0026] The fly-eye lens to be tested is located between the light source and the lens group;

[0027] After the parallel light passes through the fly-eye lens and is projected onto the lens group, the lens group focuses the light emitted from the fly-eye lens so that the light forms a light spot of the fly-eye lens on a preset imaging plane;

[0028] A processor is used to execute the following method:

[0029] Comparing the light spot of the fly-eye lens with a standard light spot; and

[0030] According to the comparison result, it is identified whether the fly-eye lens has defects.

[0031] Optionally, the at least two spherical lenses include a first lens and a second lens;

[0032] The optical testing device further includes an adjusting mechanism, which is connected to the lens group and is used to drive at least one of the first lens and the second lens to move along the optical axis to change the distance between the first lens and the second lens.

[0033] Optionally, the first lens is located on a side close to the light source, and the second lens is located on a side far from the light source;

[0034] The first lens is a biconvex lens, and the second lens is a biconcave lens.

[0035] Optionally, both the first lens and the second lens are glass spherical lenses.

[0036] In a third aspect, an embodiment of the present application provides a computer-readable storage medium on which computer instructions are stored, and the computer instructions are executed by a processor to perform the following method:

[0037] Compare the spot of the fly-eye lens with the standard spot;

[0038] According to the comparison result, it is identified whether the fly-eye lens has defects.

[0039] One beneficial effect of this application is:

[0040] The optical testing method for identifying defects in a compound eye lens provided in an embodiment of the present application realizes high-precision, high-efficiency and low-cost identification of defects in the compound eye lens to be tested by combining parallel light projection with lens group focusing technology. The optical testing method of the present application not only greatly simplifies the testing process and improves the testing speed, but also significantly enhances the accuracy of the test, providing solid technical support for the quality control of the compound eye lens. In addition, the method of the present application also opens up a new direction in the field of defect identification of compound eye lenses through optical testing means, showing significant advancement and wide practicality, and effectively promoting the further development and improvement of compound eye lens manufacturing technology.

[0041] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0043] Figure 1 A flowchart of an optical testing method provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of an optical testing system provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of the optical testing method provided in an embodiment of the present application.

[0046] Description of reference numerals:

[0047] 1. Light source; 2. Lens group; 21. First lens; 22. Second lens; 3. Fly-eye lens. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0050] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0051] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0052] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0053] The optical testing method, optical testing device and computer-readable storage medium for identifying defect of a compound eye lens provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0054] <Method Example>

[0055] According to one embodiment of the present application, an optical testing method for identifying defects in a compound eye lens is provided. Figure 1The optical testing method includes the following steps S1100 to S1400.

[0056] Step S1100, see Figure 2 , so that the parallel light passes through the compound eye lens 3 to be tested and then projects to the lens group 2.

[0057] In the step S1100, see Figure 2 , parallel light rays are emitted by a light source 1.

[0058] In a specific embodiment, the light source 1 is a collimator light source.

[0059] Of course, the light source 1 may also be other parallel light sources or small-angle light sources, etc., which is not limited in the present application.

[0060] In the step S1100, a collimator or other parallel light source may be used to generate parallel light rays, and the parallel light rays are made to pass through the fly-eye lens 3 to be tested.

[0061] It should be noted that the two opposite surfaces of the fly-eye lens are composed of a series of microlens units, and these microlens units can affect the propagation path of light.

[0062] Step S1200: focusing the light emitted from the fly-eye lens 3 through the lens group 2 so that the light forms a light spot of the fly-eye lens 3 on a preset imaging plane.

[0063] See also Figure 2 , the light passing through the fly-eye lens 3 to be tested is then projected to the lens group 2. The lens group 2 is responsible for receiving the light emitted by the fly-eye lens 3 to be tested and focusing it. The purpose of focusing is to enable the light emitted by the fly-eye lens 3 to form a clear and sharp light spot on a preset imaging surface, so as to analyze and determine the shape, size and position of the light spot later.

[0064] See also Figure 2 The lens group 2 is located as a whole on the light-emitting side of the fly-eye lens 3. The lens group 2 is composed of, for example, two or more lenses, which are all arranged along the same optical axis.

[0065] In a specific embodiment, the lens group 2 includes a first lens 21 and a second lens 22 arranged along the same optical axis, and the first lens 21 and the second lens 22 are both glass spherical lenses. Further, the first lens 21 is a biconvex lens and is located on a side close to the fly-eye lens 3, and the second lens 22 is a biconcave lens and is located on a side away from the fly-eye lens 3.

[0066] The lens group 2 is designed to enable the light emitted from the fly-eye lens 3 to be focused onto a preset imaging plane.

[0067] It should be noted that the imaging plane refers to the plane where the light spot is formed after the light is focused, and its position needs to be preset to ensure that the light spot can be clearly presented on the plane.

[0068] In the present application, information such as the shape, size and position of the light spot of the fly-eye lens 3 can reflect the optical performance and structural characteristics of the fly-eye lens 3, and is an important basis for subsequent determination of whether it meets the requirements.

[0069] That is to say, by observing and analyzing the shape, size, and position of the light spot on the imaging surface, the optical testing method of the present application can identify the defects of the compound eye lens. This capability enables the optical testing method to promptly detect the defects that may occur in the compound eye lens during the manufacturing process, providing strong support for subsequent material management and quality control.

[0070] Step S1300: Compare the light spot of the fly-eye lens with a standard light spot.

[0071] In other words, step S1300 is to compare the formed fly-eye lens spot with the standard spot.

[0072] The standard light spot is the light spot formed by a known defect-free compound eye lens under the same test conditions, which serves as a comparison benchmark. The standard light spot represents the ideal state of the compound eye lens.

[0073] In step S1300, the comparison content mainly includes the shape, size and position of the light spot.

[0074] By comparison, the difference between the light spot of the compound eye lens 3 to be tested and the standard light spot can be intuitively seen, thereby providing a basis for subsequent identification of defects of the compound eye lens.

[0075] Optionally, in order to improve the test efficiency, the comparison process can be automated by computer algorithms to reduce interference from human factors.

[0076] Of course, the comparison process can also be completed manually, and this is not limited in this application.

[0077] Step S1400: Identify whether the fly-eye lens has defects according to the comparison result.

[0078] According to the comparison result, it can be identified whether the fly-eye lens 3 to be tested has defects.

[0079] For example, if the front and back of the microlens unit of the fly-eye lens 3 are misaligned, the light spot projected on the imaging surface will have an overall position shift or shape distortion relative to the standard light spot. By comparing with the standard light spot, these deviations can be accurately determined, and the defects of the fly-eye lens 3 can be identified accordingly.

[0080] In step S1400 provided in the present application, the judgment criterion is mainly based on the difference between the light spot formed by the fly-eye lens 3 and the standard light spot.

[0081] According to the difference characteristics of the light spot, the type of defect can be further determined, such as misalignment of the microlens unit, change in curvature radius, etc.

[0082] Optionally, the recognition process in step S1400 can be automatically performed through an intelligent algorithm to improve the accuracy and efficiency of recognition.

[0083] Of course, the identification process can also be completed manually, and this is not limited in this application.

[0084] The final identification results can be used as part of a feedback mechanism to guide subsequent manufacturing and quality control processes and continuously improve the quality of the compound eye lens.

[0085] Through the above-mentioned steps S1100 to S1400, it can be ensured that the quality of the fly-eye lens meets the application requirements and prevent unqualified products from entering the market.

[0086] The optical testing method provided in the embodiment of the present application can form a clear and sharp light spot on a preset imaging surface through parallel light projection and the focusing technology of the lens group 2, thereby facilitating the subsequent high-precision identification of compound eye lens defects. The entire testing process is simple and fast, without the need for complex operations and equipment, and can significantly improve the testing efficiency. The equipment and materials used in the optical testing method are relatively simple, which reduces the testing cost and is conducive to its wide application in actual production.

[0087] In addition, by adjusting the parameters of the lens group, this optical testing method can adapt to the requirements of different projection distances and screen sizes, and is suitable for testing compound eye lenses of various types and specifications.

[0088] In summary, the optical testing method for identifying defects in a compound eye lens provided in the embodiments of the present application has the advantages of high precision, high efficiency, low cost, and wide applicability, and provides strong technical support for the quality control of compound eye lenses.

[0089] In some examples of the present application, identifying whether the fly-eye lens has defects according to the comparison result includes:

[0090] Compare the position of the light spot of the fly-eye lens with the standard light spot to identify whether the light spot of the fly-eye lens is offset relative to the standard light spot. Figure 3 .

[0091] In the example provided by the present application, through further description of the step S1400, it is shown that the key to identifying whether the fly-eye lens 3 has a defect is to compare the position of the light spot of the fly-eye lens 3 with the standard light spot. This step is intended to identify whether the light spot of the fly-eye lens 3 is offset relative to the standard light spot.

[0092] By directly comparing the positions of the light spot of the formed compound eye lens 3 with the standard light spot, the deviation of the light spot position can be captured, thereby more accurately identifying potential defects of the compound eye lens 3. This detection helps to ensure the quality of the compound eye lens and meet the requirements of the precision optical system.

[0093] This method of spot position comparison reduces misjudgment caused by non-position factors such as spot shape and size, and improves the reliability and accuracy of detection.

[0094] Furthermore, the method in this example of the present application is easy to automate, and through programming and image processing technology, a large number of compound eye lenses can be quickly inspected, significantly shortening the production cycle and improving overall production efficiency.

[0095] In summary, by comparing the position offset of the compound eye lens spot and the standard spot, this example not only effectively improves the accuracy and efficiency of defect identification, but also provides a powerful tool for lens performance evaluation, which is of great significance to improving the quality of optical products.

[0096] In some examples of the present application, when the percentage of the center position offset between the light spot of the fly-eye lens and the standard light spot exceeds a preset value, it is determined that the microlens units on two opposite surfaces of the fly-eye lens have a center misalignment defect.

[0097] According to the example provided in the present application, it is described that when the percentage of the center position offset between the light spot projected by the optical testing device of the fly-eye lens 3 to be tested and the standard light spot exceeds a preset value, it is possible to determine that the microlens units on the two opposite surfaces (such as the incident surface and the exit surface) of the fly-eye lens 3 have a center misalignment defect.

[0098] By comparing the center position offset of the light spot projected by the fly-eye lens 3 with that of the standard light spot, it is possible to accurately identify whether there is a center misalignment problem in the fly-eye lens 3. This method has higher accuracy and reliability than traditional physical measurement methods.

[0099] By setting a preset value (offset percentage threshold), the degree of light spot offset can be quantified, thereby more accurately evaluating the quality of the fly-eye lens 3. This quantitative evaluation method helps to achieve stricter quality control during the manufacturing process.

[0100] Compared with traditional physical measurement methods, the optical testing method provided by the present application does not require complex measuring equipment and cumbersome measuring processes, thereby reducing testing costs.

[0101] In summary, the optical testing method in this example of the present application can accurately determine whether there is a center misalignment defect in the compound eye lens by accurately identifying the percentage of the center position offset between the spot of the compound eye lens 3 to be tested and the standard spot. This method not only improves the accuracy and reliability of the test, but also improves production efficiency and reduces costs, which is of great significance for the quality control of the compound eye lens.

[0102] In some examples of the present application, the offset percentage is (P0 / L)*100%, where P0 is the offset of the spot of the fly-eye lens and the center position of the standard spot in the horizontal direction or vertical direction, and L is the side length of the spot of the fly-eye lens; the spot of the fly-eye lens and the standard spot are both rectangular spots; the preset value is 1%.

[0103] This example of the present application clarifies the calculation formula for the offset percentage involved in the above example, and defines the relevant parameters and preset values. The following is an analysis of the technical effects of this example of the present application.

[0104] The offset percentage is calculated by the formula (P0 / L)×100% in the above example, where P0 is the offset of the spot of the fly-eye lens 3 from the center position of the standard spot in the horizontal or vertical direction, and L is the side length of the fly-eye lens spot. This method provides an accurate quantitative indicator that can accurately reflect the degree of offset of the spot of the fly-eye lens 3 relative to the standard spot.

[0105] The preset value is set to 1%, which means that when the offset percentage exceeds 1%, it can be determined that the compound eye lens 3 to be tested has a defect such as a center misalignment of the microlens unit. This clear judgment standard helps to achieve a unified quality control standard in the production process and ensure the consistency of product quality.

[0106] Due to the use of precise quantitative indicators and clear judgment criteria, the optical testing method of the present application has higher accuracy in identifying the center misalignment defects of compound eye lenses such as microlens units, which helps to reduce misjudgment and missed judgment and improve the reliability of the test.

[0107] The optical testing method provided in the embodiment of the present application is not only accurate but also efficient, and can quickly identify a compound eye lens with a center misalignment defect, which helps to reduce the scrap rate and rework rate in the production process, thereby improving production efficiency.

[0108] In some examples of the present application, the step of identifying whether the fly-eye lens has a defect according to the comparison result further includes:

[0109] The light spot of the fly-eye lens is compared with the standard light spot in shape and size to identify whether the light spot of the fly-eye lens has a different shape and / or a size deviation relative to the standard light spot.

[0110] The process of identifying whether the fly-eye lens 3 has defects is not limited to the comparison of the light spot positions, but also includes the comparison of the light spot shapes and sizes. This comprehensive evaluation method provides a more comprehensive quality control method.

[0111] By comparing the position, shape and size of the light spot of the fly-eye lens 3, it is possible to further verify whether the fly-eye lens 3 has defects. Compared with a single light spot position comparison, this method has higher accuracy and reliability.

[0112] Shape comparison can reveal structural defects that may occur in the compound eye lens during the manufacturing process. For example, if a microlens unit of the compound eye lens is deformed or damaged, the shape of the projected light spot will change. Through shape comparison, such problems can be discovered and corrected in time.

[0113] Size comparison provides a means to quantitatively evaluate the quality of the compound eye lens. By measuring the side length, perimeter and other size parameters of the light spot projected by the compound eye lens 3 and comparing them with the standard light spot, the size deviation of the microlens unit of the compound eye lens can be quantitatively evaluated. This quantitative evaluation method helps to achieve stricter quality control during the manufacturing process.

[0114] By comprehensively considering the comparison results of the spot position, shape and size, the quality of the compound eye lens 3 to be tested can be comprehensively evaluated. This method can not only identify defective compound eye lenses, but also accurately classify and quantify the type and degree of their defects. This helps to timely discover and solve potential quality problems in the manufacturing process and improve the overall product quality.

[0115] In some examples of the present application, the optical testing method further includes:

[0116] The intervals between the lenses in the lens group are adjusted to change the projection distance of the lens group, thereby changing the size of the light spot of the fly-eye lens.

[0117] In some examples of the present application, the projection distance is 100 mm to 1000 mm.

[0118] In the example provided by the present application, the projection distance is changed by adjusting the interval between the lenses in the lens group 2, thereby changing the size of the light spot projected by the compound eye lens 3 to be tested. This flexibility enables the optical testing method of the present application to adapt to compound eye lenses of different specifications and types, as well as different testing requirements. For example, for a small-sized compound eye lens or a scene that needs to be tested in a limited space, this can be achieved by reducing the projection distance and the light spot size.

[0119] In a specific embodiment, the incident aperture of the optical test method is designed to have a diameter of 10 mm, ensuring precise control of light. At a standard projection distance of 400 mm, the imaging point diagram can be maintained at an excellent level of less than 30 μm, presenting an extremely sharp imaging effect at the edge of the picture, fully meeting the high-precision measurement requirements.

[0120] By adjusting the intervals between the lenses in the lens group 2, it is possible to cope with the changes in the requirements for different projection distances or spot sizes. This adjustment function covers a wide range of projection distances from, for example, 100 mm to 1000 mm, showing extremely high adaptability and flexibility, which is sufficient to cope with the measurement of most compound eye lenses, ensuring the comprehensiveness and accuracy of the test.

[0121] In some examples of the present application, the optical testing method further includes the following steps:

[0122] Step 2100, allowing parallel light to pass through a standard fly-eye lens and then be projected onto lens group 2;

[0123] Step 2200: The lens group 2 focuses the light emitted by the standard fly-eye lens so that the light forms a standard light spot of the standard fly-eye lens on a preset imaging plane.

[0124] By introducing a standard fly-eye lens as a reference, a known and stable standard light spot can be generated. This standard light spot provides an accurate comparison benchmark for subsequent tests, thereby significantly improving the accuracy and reliability of the test results. When the light spot of the fly-eye lens 3 to be tested is compared with the standard light spot, any deviation or defect can be accurately identified.

[0125] The method of using a standard compound eye lens to generate a standard light spot makes the test process more simplified and standardized. During the test, you only need to observe and compare the shape, size, position and other information of the light spot to quickly judge the quality of the compound eye lens to be tested.

[0126] It should be particularly emphasized that when the projection distance of the fly-eye lens 3 to be tested changes, in order to maintain the consistency and accuracy of the test, the projection distance of the standard fly-eye lens also needs to be adjusted accordingly.

[0127] This supplementary explanation is based on the basic principle of optical testing, that is, light will be refracted and focused when passing through a lens group, and there is a fixed geometric relationship between the focal length of the lens, the position of the object, and the position of the image. Therefore, when the projection distance of the compound eye lens to be tested changes, in order to maintain the stability and comparability of the light spot on the imaging surface, the projection distance of the standard compound eye lens must be adjusted synchronously.

[0128] Specifically, if the projection distance of the compound eye lens to be tested increases, in order to keep the spot size and sharpness on the imaging surface unchanged, the projection distance of the standard compound eye lens needs to be increased accordingly, and the parameters of the lens group need to be adjusted to ensure the focusing effect. Conversely, if the projection distance of the compound eye lens to be tested decreases, the projection distance of the standard compound eye lens also needs to be reduced accordingly.

[0129] This synchronous adjustment process ensures the stability and comparability of the light spot during the test, thereby improving the accuracy and reliability of the test. At the same time, it also reflects the high flexibility and adaptability of the optical test method of this application, which can cope with changes in different projection distances and test requirements.

[0130] The optical testing method provided in the embodiment of the present application has the following advantages:

[0131] (1) By comparing the shape, size and position information of the light spot of the compound eye lens to be tested with that of the standard light spot, this optical testing method can accurately identify possible structural defects of the compound eye lens to be tested, such as misalignment of the front and rear microlens units.

[0132] The introduction of specific quantitative indicators such as offset percentage makes defect identification more objective and accurate, which helps to improve the level of refinement of product quality control.

[0133] (2) The entire optical testing method can flexibly adjust different projection distances and spot sizes by adjusting the lens spacing within the lens group to meet diverse testing needs. For example, it is suitable for testing compound eye lenses of different specifications and types, enhancing the versatility and adaptability of the test.

[0134] (3) By introducing a standard compound eye lens as a reference, the quality of the compound eye lens to be tested can be quickly judged by simply observing and comparing the light spot information, thereby improving the test efficiency.

[0135] (4) The optical testing method of the present application helps to timely discover and eliminate defective compound eye lenses, reducing the increase in production costs caused by product quality problems. At the same time, the optical testing method also provides strong support for the improvement of the manufacturing process of compound eye lenses, which helps to promote the continuous improvement of product quality.

[0136] The optical testing method of the present application not only solves the problem of difficulty in identifying defects of compound eye lenses in the prior art, but also provides new ideas for technical innovation in related fields. The optical testing method provides more reliable technical support for the quality control of optical devices.

[0137] <Optical test equipment>

[0138] The present application also provides an optical testing device. Figure 2 , comprising a light source 1, a lens group 2 and a processor; the light source 1 is used to generate parallel light; the lens group 2 includes at least two spherical lenses; the fly-eye lens 3 to be tested is located between the light source 1 and the lens group 2; after the parallel light passes through the fly-eye lens 3 and is projected onto the lens group 2, the lens group 2 focuses the light emitted by the fly-eye lens 3 so that the light forms a light spot of the fly-eye lens 3 on a preset imaging surface; the processor is used to execute the following method: compare the light spot of the fly-eye lens 3 with a standard light spot; and identify whether the fly-eye lens 3 has a defect based on the comparison result.

[0139] The optical testing device provided in this embodiment is mainly composed of the following components:

[0140] The light source 1 is used to generate parallel light, which is the incident light source of the entire optical testing device. The characteristics of parallel light ensure the uniformity and consistency of light when passing through the fly-eye lens, providing a reliable basis for subsequent spot comparison.

[0141] The light source 1 is, for example, a collimator light source.

[0142] Of course, the light source 1 may also be other parallel light sources or small-angle light sources, etc., which is not limited in the present application.

[0143] The lens group 2 includes at least two spherical lenses, which are located between the compound eye lens 3 to be tested and the imaging surface. The main function of the lens group is to focus the light emitted by the compound eye lens 3 so that the light forms a clear and sharp light spot on the preset imaging surface. By adjusting the lens spacing in the lens group 2, flexible adjustment of different projection distances and screen sizes can be achieved, thereby meeting diverse testing needs.

[0144] The compound eye lens 3, i.e. the compound eye lens to be tested, is placed between the light source 1 and the lens group 2 during the test, which is the core part of the optical test device. The compound eye lens 3 is composed of a series of micro lens units, which are designed to improve the uniformity and energy utilization of the light spot. During the test, the parallel light emitted by the light source 1 will pass through the compound eye lens 3 and be projected to the lens group 2, where a focusing phenomenon will occur to form a specific light spot.

[0145] The processor is the intelligent core of the optical testing device, and is used to perform the tasks of spot comparison and defect identification. It compares the spot of the compound eye lens 3 to be tested with the standard spot, and by comparing the shape, size, position and other information of the spot, it can be determined whether the compound eye lens has defects, such as misalignment of the front and rear microlens units.

[0146] In summary, the optical testing device provided in the embodiment of the present application has the technical effects of accurately identifying defects, improving testing efficiency, enhancing testing flexibility, and reducing testing costs. The device provides strong support for the quality control of compound eye lenses and helps promote the sustainable development of the optical device manufacturing industry.

[0147] In some examples of this application, see Figure 2 The at least two spherical lenses include a first lens 21 and a second lens 22; the optical testing device also includes an adjustment mechanism, which is connected to the lens group 2 and is used to drive at least one of the first lens 21 and the second lens 22 to move along the optical axis to change the distance between the first lens 21 and the second lens 22.

[0148] Wherein, all lenses in the lens group are arranged along the same optical axis.

[0149] Specifically, the lens group 2 includes at least two spherical lenses, a first lens 21 and a second lens 22, and the adjustment mechanism is connected to the lens group 2, and can drive at least one of the first lens 21 and the second lens 22 to move along the optical axis. This design allows the distance between the first lens 21 and the second lens 22 to be adjusted according to specific needs, thereby changing the projection distance of the entire optical test device and the size of the formed light spot. This flexibility enables the optical test device to be more widely used in different types of compound eye lens tests, improving the versatility and adaptability of the test.

[0150] Adjusting the lens spacing within the lens group can also optimize the quality of the light spot. By finely adjusting the lens position, it is possible to ensure that the light forms a clear and sharp light spot on the imaging surface, thereby improving the accuracy and reliability of the test. This is particularly important for identifying tiny defects in compound eye lenses.

[0151] By precisely controlling the lens spacing, the test system can accurately measure the tiny deviation of the spot position, which is of great significance for evaluating the degree of defects in the compound eye lens and formulating corresponding quality control measures.

[0152] The introduction of the adjustment mechanism simplifies the test process. Different test conditions can be switched simply by adjusting the lens spacing. This greatly shortens the test time and improves the test efficiency.

[0153] In summary, the optical testing device in the example of the present application significantly improves the adaptability, spot quality, testing efficiency and accuracy of the test by introducing an adjustment mechanism and an adjustable lens group design. These optimizations enable the optical testing device to better meet the quality control requirements of the compound eye lens.

[0154] In addition, in the present application, the sharpness of the edge of the picture can be further improved by increasing the number of lenses in the lens group.

[0155] In some examples of this application, see Figure 2 The first lens 21 is located on a side close to the light source 1, and the second lens 22 is located on a side away from the light source 1; the first lens 21 is a biconvex lens, and the second lens 22 is a biconcave lens.

[0156] For the example in which the first lens 21 is a biconvex lens and the second lens 22 is a biconcave lens, this design combines the characteristics of converging and diverging light. This combined design not only improves the imaging quality, but also reduces aberrations, so that the optical system can perform well in various application scenarios.

[0157] In some examples of the present application, both the first lens 21 and the second lens 22 are glass spherical lenses.

[0158] For the example in which both the first lens 21 and the second lens 22 are glass spherical lenses, the high light transmittance and low dispersion characteristics of the glass material ensure the high efficiency and accuracy of light during transmission.

[0159] The design of the spherical lens simplifies the manufacturing and assembly process, reduces costs, and maintains good imaging effects. The combination of this material (glass material in this application) and the surface design enables the optical test device to maintain stable performance in various environments.

[0160] In summary, the combination of biconvex and biconcave lenses optimizes the light path and improves the imaging quality, while the selection of glass spherical lenses ensures high light transmittance and stability of the optical system. These designs not only improve the performance of the optical test device, but also provide a strong guarantee for its reliability and stability in practical applications.

[0161] The present application is described in detail below through Example 1 and Example 2.

[0162] Example 1

[0163] The optical testing device provided in this embodiment 1 is shown in FIG. Figure 2 , which includes: a light source 1, a lens group 2, an adjustment mechanism and a processor;

[0164] The light source 1 is a collimator light source, which is used to generate parallel light;

[0165] The lens group 2 includes a first lens 21 and a second lens 22;

[0166] The adjustment mechanism is connected to the lens group 2, and is used to drive at least one of the first lens 21 and the second lens 22 to move along the optical axis to change the distance between the first lens 21 and the second lens 22; wherein the first lens 21 is located on a side close to the light source 1, and the second lens 22 is located on a side away from the light source 1; the first lens 21 is a biconvex glass spherical lens, and the second lens 22 is a biconcave glass spherical lens;

[0167] The fly-eye lens 3 to be tested is located between the light source 1 and the lens group 2; after the parallel light passes through the fly-eye lens 3 and is projected onto the lens group 2, the lens group 2 focuses the light emitted from the fly-eye lens 3 so that the light forms a light spot of the fly-eye lens 3 on a preset imaging plane;

[0168] The processor is used to execute the following method:

[0169] Comparing the light spot of the fly-eye lens 3 with a standard light spot; and

[0170] According to the comparison result, it is identified whether the fly-eye lens 3 has defects.

[0171] This embodiment 1 is tested for the case where the emission angle of the fly-eye lens 3 is 10°. Under standard conditions, when the optical testing device projects the fly-eye lens 3 at a projection distance of 400 mm, the resulting spot size is, for example, 180*180 mm. This spot size provides a reference benchmark for subsequent evaluation of whether the fly-eye lens has defects.

[0172] In order to more effectively identify possible defects of the compound eye lens, the parameters of the optical testing device are further adjusted. Specifically, for example, the projection distance is increased to 1000 mm, and the spacing between the first lens 21 and the second lens 22 is adjusted accordingly. Such an adjustment expands the spot size to 400*400 mm, thereby providing a larger observation area, which is convenient for capturing the slight offset of the spot. In this way, the defects of the compound eye lens 3 can be detected more accurately and sensitively.

[0173] Example 2

[0174] The optical testing device in this embodiment 2 is the same as that in embodiment 1. For details, please refer to the description of the optical testing device in the above embodiment 1.

[0175] This embodiment 2 is tested for the case where the emission angle of the fly-eye lens 3 is 6°. At a projection distance of 400 mm, the spot size obtained under standard conditions is 100*100 mm.

[0176] In order to meet different test requirements, the parameters of the optical test device can be adjusted. For example, the projection distance is increased to 1000 mm, and the distance between the first lens 1 and the second lens 2 is adjusted so that the spot size becomes 250*250 mm. Such adjustments enable the optical test device to be suitable for a larger test space while maintaining sensitivity and accuracy to compound eye lens defects.

[0177] In addition, the projection distance can be reduced to 100mm, and the lens spacing can be adjusted accordingly. This adjustment reduces the projection screen size to 30*30mm, which is more suitable for use in test systems in small spaces. This flexibility not only improves the applicability of optical test devices, but also provides more diverse test solutions to meet test needs in different scenarios.

[0178] The optical parameters of the first lens 21 and the second lens 22 in Example 1 and Example 2 can be seen in Table 1 below.

[0179] Table 1

[0180] R1(mm) R2(mm) Center thickness(mm) Nd Vd First lens 21 25.789 -29.174 5 1.5891 61.248 Second lens 22 -25.562 25.296 5 1.5891 61.248

[0181] In Table 1, the curvature radius of the surface of the first lens 21 close to the light source 1 is R1, and the curvature radius of the surface away from the light source 1 is R2. The curvature radius of the surface of the second lens 22 close to the light source 1 is R1, and the curvature radius of the surface away from the light source 1 is R2.

[0182] <Computer Readable Storage Medium>

[0183] The present application also provides a computer-readable storage medium on which computer instructions are stored. When the computer instructions are executed by a processor, the following steps of the optical testing method for identifying fly-eye lens defects provided in the present application are executed:

[0184] Compare the spot of the fly-eye lens with the standard spot;

[0185] According to the comparison result, it is identified whether the fly-eye lens has defects.

[0186] The present application may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present application.

[0187] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0188] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0189] The computer program instructions for performing the operation of the present application can be assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions can be executed completely on a user's computer, partially on a user's computer, executed as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer can 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 can be connected to an external computer (for example, using an Internet service provider to connect through the Internet). In some embodiments, by using the state information of a computer-readable program instruction to personalize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), the electronic circuit can execute a computer-readable program instruction, thereby realizing various aspects of the present application.

[0190] Various aspects of the present application are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0191] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0192] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0193] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a part of a module, program segment or instruction, and the part of the module, program segment or instruction contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes 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 box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that it is equivalent to implement it by hardware, implement it by software, and implement it by combining software and hardware.

[0194] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present application is defined by the appended claims.

[0195] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0196] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An optical testing method for identifying defects in a compound eye lens, characterized in that: include: Allow parallel light to pass through the compound eye lens to be tested and then project to the lens group; Focusing the light emitted from the compound eye lens through the lens group so that the light forms a light spot of the compound eye lens on a preset imaging surface; Comparing the light spot of the fly-eye lens with a standard light spot; According to the comparison result, it is identified whether the fly-eye lens has defects.

2. The optical testing method according to claim 1, characterized in that: The step of identifying whether the fly-eye lens has a defect according to the comparison result includes: The position of the light spot of the fly-eye lens is compared with the standard light spot to identify whether the light spot of the fly-eye lens is offset relative to the standard light spot.

3. The optical testing method according to claim 2, characterized in that: When the percentage of the center position offset between the light spot of the fly-eye lens and the standard light spot exceeds a preset value, it is determined that the microlens units on two opposite surfaces of the fly-eye lens have a center misalignment defect.

4. The optical testing method according to claim 3, characterized in that: The offset percentage is (P0 / L)*100%, where P0 is the offset of the spot of the fly-eye lens from the center position of the standard spot in the horizontal direction or vertical direction, and L is the side length of the spot of the fly-eye lens; The light spot of the compound eye lens and the standard light spot are both rectangular light spots; The preset value is 1%.

5. The optical testing method according to claim 2, characterized in that: The step of identifying whether the fly-eye lens has defects according to the comparison result further includes: The light spot of the fly-eye lens is compared with the standard light spot in shape and size to identify whether the light spot of the fly-eye lens has a different shape and / or a size deviation relative to the standard light spot.

6. The optical testing method according to claim 1, characterized in that: The optical testing method further comprises: The intervals between the lenses in the lens group are adjusted to change the projection distance of the lens group, thereby changing the size of the light spot of the fly-eye lens.

7. The optical testing method according to claim 6, characterized in that: The projection distance is 100 mm to 1000 mm.

8. The optical testing method according to claim 1, characterized in that: The optical testing method further comprises: Make parallel light pass through a standard fly-eye lens and then project it onto the lens group; The lens group focuses the light emitted by the standard fly-eye lens so that the light forms a standard light spot of the standard fly-eye lens on a preset imaging surface.

9. An optical testing device, characterized in that: include: A light source (1) for generating parallel light rays; A lens group (2) comprising at least two spherical lenses; The fly-eye lens (3) to be tested is located between the light source (1) and the lens group (2); After the parallel light passes through the compound eye lens (3) and is projected onto the lens group (2), the lens group (2) focuses the light emitted from the compound eye lens (3) so that the light forms a light spot of the compound eye lens (3) on a preset imaging plane; A processor is used to execute the following method: comparing the light spot of the fly-eye lens (3) with a standard light spot; and Based on the comparison result, it is identified whether the fly-eye lens (3) has defects.

10. The optical testing device according to claim 9, characterized in that: The at least two spherical lenses include a first lens (21) and a second lens (22); The optical testing device further comprises an adjustment mechanism, which is connected to the lens group (2) and is used to drive at least one of the first lens (21) and the second lens (22) to move along the optical axis so as to change the distance between the first lens (21) and the second lens (22).

11. The optical testing device according to claim 10, characterized in that: The first lens (21) is located on a side close to the light source (1), and the second lens (22) is located on a side far from the light source (1); The first lens (21) is a biconvex lens, and the second lens (22) is a biconcave lens.

12. The optical testing device according to claim 11, characterized in that: The first lens (21) and the second lens (22) are both glass spherical lenses.

13. A computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are executed by a processor to perform the following method: Compare the spot of the fly-eye lens with the standard spot; According to the comparison result, it is identified whether the fly-eye lens has defects.

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