Optical waveguide detection system and test method thereof, electronic equipment and storage medium

Abstract

The invention discloses an optical waveguide detection system and a test method thereof, electronic equipment and a storage medium, and relates to the technical field of optical waveguide detection.The optical waveguide detection system comprises a camera module and a projection light source module, and a waveguide product to be detected is arranged between the projection light source module and the camera module; the projection light source module comprises a projection light source and a physical graph card; the projection light source module is configured to emit an optical image of the physical graphic card irradiated by a projection light source to the waveguide product to be detected; the camera module is configured to collect an optical image transmitted by the waveguide product to be tested, take the optical image transmitted by the waveguide product to be tested as a test image of the waveguide product to be tested, and detect the optical performance of the waveguide product to be tested according to the test image. The accuracy of optical performance detection of the optical waveguide product is improved.

Description

Technical Field

[0001] The present application relates to the field of optical waveguide detection technology, and in particular to an optical waveguide detection system and a test method thereof, an electronic device, and a storage medium. Background Art

[0002] With the continuous development of optical waveguide detection technology, users have put forward higher requirements for the detection of optical performance of optical waveguide products.

[0003] At present, optical waveguide products are widely used in many fields, such as AR (Augmented Reality), VR (Virtual Reality), etc. In order to ensure that the optical performance of optical waveguide products meets the requirements, in the field of optical waveguide detection, common test equipment usually uses a projection optical machine to detect the optical performance of optical waveguide products. However, although the projection optical machine can basically realize the test of optical waveguide performance and can meet the basic requirements in the actual production process, due to the limitations of its own characteristics, the projected image has pixelation. Under current technical conditions, it is difficult to take into account FOV (Field of View, large field of view) and high pixel count. And the pixelation of the projection optical machine will bring many problems to the testing of optical waveguide products, especially when testing MTF (Modulation Transfer Function, optical waveguide modulation transfer function). This pixelation of the image will increase the sharpness of the edge spread function (or line spread function), and ultimately lead to the distortion of the MTF value obtained by the test, which cannot accurately reflect the true optical performance of the optical waveguide product.

[0004] Therefore, how to improve the accuracy of optical performance testing of optical waveguide products is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The main purpose of the present application is to provide an optical waveguide detection system and a test method thereof, an electronic device and a storage medium, aiming to improve the accuracy of optical performance detection of optical waveguide products.

[0006] To achieve the above-mentioned purpose, the present application provides an optical waveguide detection system, the optical waveguide detection system includes a camera module and a projection light source module, the waveguide product to be tested is arranged between the projection light source module and the camera module, and the projection light source module includes a projection light source and a physical chart card;

[0007] The projection light source module is configured to project the optical image of the physical chart after being illuminated by the projection light source onto the waveguide product to be tested;

[0008] The camera module is configured to capture the optical image transmitted through the waveguide product to be tested, and use the optical image transmitted through the waveguide product to be tested as a test image of the waveguide product to be tested, and detect the optical performance of the waveguide product to be tested based on the test image.

[0009] In one embodiment, the projection light source module further includes an optical control unit, a picture card transmission unit and a filter unit;

[0010] The filter unit is arranged between the projection light source and the image card transmission unit, the physical image card is arranged between the image card transmission unit and the optical control unit, and the physical image card is fixed on a side of the image card transmission unit away from the filter unit.

[0011] In one embodiment, the optical control unit comprises at least an adjustable diaphragm, a collimation system and a shading component;

[0012] The collimation system is arranged between the adjustable aperture and the shading component, the shading component is arranged on the side close to the physical image card, the camera module is mounted on the side of the adjustable aperture away from the collimation system, and the optical axis of the adjustable aperture coincides with the optical axis in the camera aperture of the camera module.

[0013] In one embodiment, the shading assembly includes a first shading plate, a hollow area, and a second shading plate, and the first shading plate is the same as the second shading plate;

[0014] The first light shielding plate and the second light shielding plate are respectively arranged on both sides of the hollow area, and the first light shielding plate, the hollow area and the second light shielding plate are all arranged on the same horizontal line.

[0015] In one embodiment, the image card transfer unit is a bidirectional electric track provided with a physical image card belt, and the number of the physical image cards is multiple, and each of the physical image cards is evenly fixed on the physical image card belt at a preset interval.

[0016] The target image card is exposed from the hollow area, the central axis of the projection light source and the target image card overlaps with the central axis of the hollow area respectively, and the target image card is any one of the multiple physical image cards.

[0017] In one embodiment, the optical waveguide detection system further comprises a material conveyor belt, wherein the material conveyor belt is parallel to a horizontal plane on which the camera module and the projection light source module are arranged;

[0018] The material conveyor belt is configured to convey the waveguide product to be tested between the camera module and the projection light source module, so that the waveguide product to be tested receives the optical image of the physical picture card after being illuminated by the projection light source, and projects the optical image to the camera module.

[0019] In addition, to achieve the above-mentioned purpose, the present application also provides a test method of an optical waveguide detection system, the test method of the optical waveguide detection system is applied to the optical waveguide detection system described in any one of the above-mentioned items, and the test method of the optical waveguide detection system includes:

[0020] After the projection light source module projects the optical image of the physical chart illuminated by the projection light source onto the waveguide product to be tested, the camera module collects the optical image transmitted through the waveguide product to be tested;

[0021] The optical image transmitted through the waveguide product to be tested is used as a test image of the waveguide product to be tested, and the optical performance of the waveguide product to be tested is detected based on the test image.

[0022] In one embodiment, the step of detecting the optical performance of the waveguide product to be tested according to the test image comprises:

[0023] Performing an optical waveguide test on the waveguide product to be tested according to the test image to obtain parameter indicators of the waveguide product to be tested, and detecting whether the parameter indicators are within a preset indicator threshold range;

[0024] If the parameter index is within the index threshold range, it is determined that the optical performance of the waveguide product to be tested is qualified;

[0025] If the parameter index is not within the index threshold range, it is determined that the optical performance of the waveguide product to be tested is unqualified.

[0026] In addition, to achieve the above-mentioned purpose, the present application also provides an electronic device, which includes a memory, a processor, and a test program of the optical waveguide detection system stored in the memory and executable on the processor, and when the test program of the optical waveguide detection system is executed by the processor, the steps of the test method of the optical waveguide detection system are implemented.

[0027] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, which is a computer-readable storage medium, and a test program of the optical waveguide detection system is stored on the computer-readable storage medium. When the test program of the optical waveguide detection system is executed by a processor, the steps of the above-mentioned test method of the optical waveguide detection system are implemented.

[0028] The present application provides an optical waveguide detection system and a test method thereof, an electronic device and a storage medium, which significantly improves the accuracy of optical performance detection of optical waveguide products. The optical waveguide detection system provided in the present application includes a camera module and a projection light source module, the waveguide product to be tested (i.e., the optical waveguide product) is arranged between the projection light source module and the camera module, the projection light source module introduces a high-quality physical image card as a test image source, and the optical image of the physical image card is incident on the waveguide product to be tested after the projection light source in the projection light source module illuminates the physical image card, that is, the projection light source module provided in the present application uses a physical image card to replace the pixelated projection light machine through the projection light source, effectively avoiding the problems caused by image pixelation, ensuring that the optical image edge of the object image card projected to the waveguide product to be tested by the projection light source is clear and pixelated; next, the camera module collects the optical image transmitted through the waveguide product to be tested as a test image, and detects the optical performance of the waveguide product to be tested based on the test image, so as to more accurately reflect the optical performance of the optical waveguide product, thereby significantly improving the accuracy of optical performance detection of the optical waveguide product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] 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 labor.

[0031] Figure 1 It is a structural block diagram of the optical waveguide detection system;

[0032] Figure 2 It is a schematic diagram of the structure of a projection light source module involved in an embodiment of the optical waveguide detection system of the present application;

[0033] Figure 3 is a top view of the optical waveguide detection system involved in the embodiment of the present application;

[0034] Figure 4 This is a flow chart of a second embodiment of a testing method for an optical waveguide detection system of the present application;

[0035] Figure 5 It is a projection image corresponding to the pure color picture card involved in the embodiment of the present application and a schematic diagram of ROI distribution;

[0036] Figure 6 It is a schematic diagram of the structure of an electronic device involved in the embodiment of the present application.

[0037] Description of Figure Numbers:

[0038] 10. Camera module; 20. Projection light source module; 100. Waveguide product to be tested; 201. Projection light source; 202. Physical map card; 21. Optical control unit; 22. Map card transmission unit; 23. Filter unit; 211. Adjustable aperture; 212. Collimation system; 213. Shading assembly; 213-1. First shading plate; 200. Hollow area; 213-2. Second shading plate; 221. Physical map card tape; 222. Bidirectional electric track.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0044] In the field of optical waveguide testing technology, common testing equipment usually uses a projection optical machine to test the optical performance of optical waveguide products. This method can basically achieve the test of optical waveguide performance and can also meet basic requirements in the actual production process. However, due to the limitations of its own characteristics, the projected image of this projection optical machine is pixelated, and it is difficult for current technology to take into account both FOV (Field of View) and high pixel count. The pixelation of the projection optical machine will inevitably affect the accuracy of the optical waveguide test results, especially when testing the MTF (Modulation Transfer Function). This image pixelation will increase the sharpness of the edge spread function (or line spread function), and ultimately lead to distortion of the MTF value obtained by the test.

[0045] In order to solve the detection defects existing in the above-mentioned existing optical waveguide detection technology, the present application provides an optical waveguide detection system and a test method thereof, an electronic device and a storage medium.

[0046] The present application embodiment provides an optical waveguide detection system, referring to Figure 1 As shown, Figure 1 The optical waveguide detection system includes a camera module 10 and a projection light source module 20 . The waveguide product 100 to be tested is arranged between the projection light source module 20 and the camera module 10 . The projection light source module 20 includes a projection light source 201 and a physical image card 202 .

[0047] In this embodiment, refer to Figure 1 In the present application, the waveguide product 100 to be tested is arranged between the projection light source module 20 and the camera module 10, and a projection light source 201 and a physical image card 202 are arranged in the projection light source module 20, so that the projection light source 201 can use the physical image card 202 to replace the pixelated projection light machine, which not only ensures that the optical image on the physical image card 202 can be projected onto the waveguide product 100 to be tested without pixelation interference, but also allows the camera module 10 to capture and record the image details of the optical image after the waveguide transmission of the waveguide product 100 to be tested, thereby significantly improving the test accuracy of key optical indicators such as MTF, and avoiding the numerical distortion problem caused by image pixelation in traditional methods.

[0048] It should be noted that the physical image card 202 can be one or more of other image cards such as a pure color image card, a black and white checkerboard image card, and a beveled edge image card, that is, the corresponding physical image card 202 image card can be added or deleted according to the test needs. Among them, the pure color image card is used to analyze and evaluate the light effect, uniformity and color deviation performance of the waveguide product 100 to be tested; the black and white checkerboard image card is used to evaluate the contrast performance of the waveguide product 100 to be tested; and the beveled edge image card is used to evaluate the imaging resolution performance of the waveguide product 100 to be tested. In addition, the pure color image card can be understood as an image card with a single uniform color on the surface, such as a white image card, a black image card, a gray image card, a red image card, a green image card, and a blue image card. The above is only a feasible implementation method in this application, and this application does not make any limitation here.

[0049] The projection light source 201 can be changed according to the test band, and this application does not impose any limitation on this.

[0050] The projection light source module 20 is configured to project an optical image of the physical chart 202 illuminated by the projection light source 201 onto the waveguide product 100 to be tested.

[0051] In this embodiment, refer to Figure 1 The projection light source 201 in the projection light source module 20 provided in the present application evenly irradiates light onto the physical picture card 202, avoiding shadows or bright spots caused by uneven illumination, thereby ensuring that the picture card image of the physical picture card 202 can be fully converted into a visible optical image, thereby ensuring the image quality of the optical image projected onto the waveguide product 100 to be tested. Next, the optical image of the physical picture card 202 irradiated by the projection light source 201 will be accurately projected onto the waveguide product 100 to be tested through the exit surface of the projection light source module 20 as incident light. It is particularly critical that the projection light source module 20 provided in the present application uses the physical picture card 202 to replace the pixelated projection light machine through the projection light source 201, effectively avoiding the problems caused by image pixelation, and ensuring that the optical image of the object picture card irradiated by the projection light source 201 and projected onto the waveguide product 100 to be tested has clear edges and no pixelation.

[0052] The camera module 10 is configured to collect an optical image transmitted through the waveguide product 100 to be tested, and use the optical image transmitted through the waveguide product 100 to be tested as a test image of the waveguide product 100 to be tested, and detect the optical performance of the waveguide product 100 to be tested based on the test image.

[0053] In this example, when the physical image card 202 is converted into an optical image through uniform illumination of the projection light source 201 and enters the camera module 10 through the waveguide product to be tested 100, the camera module 10 provided in the present application can quickly and accurately capture the optical image after the waveguide transmission through the waveguide product to be tested 100; next, the optical image after the waveguide transmission through the waveguide product to be tested 100 is used as a test image to detect the optical performance of the waveguide product to be tested 100, so that the optical performance of the waveguide product to be tested 100 can be more accurately reflected, thereby improving the accuracy of the optical performance detection of the optical waveguide product.

[0054] In summary, the present application provides an optical waveguide detection system and its test method, electronic device and storage medium, which significantly improve the accuracy of optical performance detection of optical waveguide products. The optical waveguide detection system provided in the present application includes a camera module 10 and a projection light source module 20. The waveguide product 100 to be tested (i.e., the optical waveguide product) is arranged between the projection light source module 20 and the camera module 10. The projection light source module 20 introduces a high-quality physical image card 202 as a test image source, and after irradiating the physical image card 202 with the projection light source 201 in the projection light source module 20, the optical image of the physical image card 202 is incident on the waveguide product 100 to be tested. That is, the projection light source module 20 provided in the present application adopts the physical image card 20 through the projection light source 201. 2 replaces the pixelated projection light machine, effectively avoiding the problems caused by the pixelation of the image, and ensuring that the optical image of the object chart projected by the projection light source 201 to the waveguide product 100 to be tested has clear edges and no pixelation; next, the camera module 10 collects the optical image transmitted by the waveguide product 100 to be tested as a test image, and detects the optical performance of the waveguide product 100 to be tested based on the test image, so as to more accurately reflect the optical performance of the optical waveguide product, thereby significantly improving the accuracy of the optical performance detection of the optical waveguide product.

[0055] Further, in some feasible embodiments, referring to Figure 2 , Figure 2 It is a schematic diagram of the structure of a projection light source module 20 involved in an embodiment of the optical waveguide detection system of the present application. Figure 2 The structural schematic diagram of the projection light source module 20 shown can be understood as a side view of the projection light source module 20. The projection light source module 20 also includes an optical control unit 21, an image card transmission unit 22, and a filter unit 23; the filter unit 23 is arranged between the projection light source 201 and the image card transmission unit 22, and a physical image card 202 is arranged between the image card transmission unit 22 and the optical control unit 21, and the physical image card 202 is fixed on a side of the image card transmission unit 22 away from the filter unit 23.

[0056] In this embodiment, refer to Figure 2, the projection light source module 20 provided in the present application is also integrated with an optical control unit 21, a picture card transmission unit 22 and a filter unit 23 that work together, thereby realizing efficient integration of light source processing and image transmission. Specifically, the present application cleverly places the filter unit 23 between the projection light source 201 and the picture card transmission unit 22, which can effectively filter out unnecessary stray light of the projection light source 201, thereby effectively improving the purity and stability of the projection light source 201. In addition, the present application also provides a physical picture card 202 between the picture card transmission unit 22 and the optical control unit 21. In a specific embodiment, the physical picture card 202 is fixed on a side away from the filter unit 23, ensuring that the light of the projection light source 201 can be accurately projected onto the physical picture card 202 after passing through the filter unit 23, and then converted into a high-quality optical image. Next, the optical image is used as incident light and then optically regulated by the optical regulation unit 21 before being incident on the waveguide product 100 to be tested, thereby ensuring the reliability and accuracy of the transmitted optical image and greatly enhancing the performance of the projection light source module 20 in optical waveguide detection.

[0057] It should be noted that the filter unit 23 may include a filter and a polarizer, and the filter and polarizer in the filter unit 23 may be added according to test requirements, and the present application does not impose any limitation thereto.

[0058] Further, in some other feasible embodiments, referring to Figure 2 The optical control unit 21 at least includes an adjustable aperture 211, a collimation system 212 and a shading component 213; the collimation system 212 is arranged between the adjustable aperture 211 and the shading component 213, the shading component 213 is arranged on the side close to the physical image card 202, and the camera module 10 is mounted on the side of the adjustable aperture 211 away from the collimation system 212, and the optical axis of the adjustable aperture 211 coincides with the optical axis in the camera aperture of the camera module 10.

[0059] In this embodiment, the optical control unit 21 further ensures the quality of the optical image projected onto the waveguide product 100 to be tested through the coordinated work of the adjustable diaphragm 211, the collimation system 212 and the shading component 213. In this application, the adjustable diaphragm 211 is used as the exit surface of the projection light source module 20, that is, the adjustable diaphragm 211 can adjust the size of the entrance pupil according to the design specifications of the waveguide product 100 to be tested, thereby realizing the control of the light intensity. In other words, by adjusting the opening and closing degree of the diaphragm, the light intensity projected onto the optical image projected onto the waveguide product 100 to be tested can be flexibly controlled to avoid overexposure or underexposure. Next, the collimation system 212 is arranged between the adjustable aperture 211 and the shading component 213. After the shading component 213 further eliminates the influence of stray light on the optical image obtained by irradiating the physical chart 202 with the projection light source, the light representing the optical image incident on the waveguide product 100 to be tested is collimated, thereby ensuring that the light representing the optical image remains in a parallel state during the propagation process, which helps to maintain the uniform distribution of the light of the optical image projected on the waveguide product 100 to be tested, avoiding the generation of unfavorable factors such as shadows or bright spots, so that the light representing the optical image can be projected onto the waveguide product 100 to be tested in a more stable and reliable manner. It is particularly critical that the present application also makes the optical axis of the adjustable aperture 211 coincide with the optical axis in the camera aperture of the camera module 10, which helps to reduce the image distortion or blurring caused by the optical axis offset, and improves the accuracy and stability of the subsequent image acquisition of the camera module 10. That is to say, after the optical axis of the adjustable aperture 211 coincides with the optical axis in the camera aperture of the camera module 10, the optical image projected from the projection light source module 20 can be accurately transmitted through the waveguide of the waveguide product 100 to be tested and enter the field of view of the camera module 10, thereby achieving efficient capture and recording of the optical image transmitted through the waveguide of the waveguide product 100 to be tested.

[0060] Further, in some feasible embodiments, referring to Figure 2 The shading assembly 213 includes a first shading plate 213-1, a hollow area 200 and a second shading plate 213-2, and the first shading plate 213-1 is the same as the second shading plate 213-2; the first shading plate 213-1 and the second shading plate 213-2 are respectively arranged on both sides of the hollow area 200, and the first shading plate 213-1, the hollow area 200 and the second shading plate 213-2 are all arranged on the same horizontal line.

[0061] In this embodiment, refer to Figure 2The first light shielding plate 213-1 and the second light shielding plate 213-2 provided in the present application serve as barriers for the light representing the optical image obtained by irradiating the physical image card 202 via the projection light source 201, effectively blocking the influence of stray light on the optical image, and allowing the light representing the optical image to be incident on the collimation system 212 through the hollow area 200, thereby ensuring the purity and stability of the light representing the optical image during the light propagation process. It is particularly critical that the present application arranges the first light shielding plate 213-1, the hollow area 200 and the second light shielding plate 213-2 on the same horizontal line. When the optical image formed by the projection light source 201 irradiating the physical image card 202 enters the light shielding component 213, since the first light shielding plate 213-1, the hollow area 200 and the second light shielding plate 213-2 in the light shielding component 213 are all on the same horizontal line, the light representing the optical image can smoothly pass through the hollow area 200 without being blocked or offset.

[0062] Further, in some other feasible embodiments, referring to Figure 2 The image card transmission unit 22 is a bidirectional electric track 222 provided with a physical image card belt 221. There are multiple physical image cards 202. Each physical image card 202 is evenly fixed on the physical image card belt 221 at a preset interval. The target image card is exposed from the hollow area 200. The central axis of the projection light source 201 and the target image card overlaps with the central axis of the hollow area 200 respectively. The target image card is any one of the multiple physical image cards 202.

[0063] In this embodiment, each physical image card 202 provided in the present application is evenly fixed on the physical image card belt 221 at a preset interval, and the physical image card belt 221 is placed on a bidirectional transmission track, ensuring that the relative positions between the physical image cards 202 remain unchanged, and avoiding errors caused by uneven spacing of the physical image cards 202. At the same time, the number of physical image cards 202 can be adjusted according to actual needs to meet the needs of different detection scenarios. In addition, the physical image card belt 221 provided in the present application is placed on a bidirectional electric track 222, which provides a stable mobile platform for the physical image card belt 221, and can also realize forward and reverse transmission according to test requirements, which not only improves the speed of replacing the physical image card 202, but also ensures the stability and accuracy of the physical image card 202 during movement.

[0064] It should be noted that this application Figure 2The physical image card belt 221 shown is fixed with physical image cards 202-1, 202-2, 202-3, 202-4 and 202-5, wherein the physical image card 202-3 represents the target image card. Exemplarily, when the physical image card 202-3 needs to be projected, the projection light source module 20 provided in the present application will control the bidirectional electric track 222 to move the physical image card 202-3 as the target image card accurately to the bottom of the hollow area 200 in the shading component 213. At this time, the optical axis of the projection light source 201, the central axis of the target image card and the central axis of the hollow area 200 will completely overlap to form an accurate light path. That is to say, the light from the projection light source 201 can be accurately projected onto the target card, and the pattern or information of the target card can be clearly presented to form an optical image, and then the light representing the optical image can be accurately incident on the collimation system 212 through the hollow area 200 in the shading component 213, thereby effectively ensuring the quality of the optical image.

[0065] Further, in some feasible embodiments, referring to Figure 3 , Figure 3 1 is a top view of the optical waveguide detection system involved in the embodiment of the present application. The optical waveguide detection system also includes a material conveyor belt, which is parallel to the horizontal plane where the camera module 10 and the projection light source module 20 are arranged; the material conveyor belt is configured to convey the waveguide product 100 to be tested between the camera module 10 and the projection light source module 20, so that the waveguide product 100 to be tested receives the optical image of the physical image card 202 after being illuminated by the projection light source 201, and projects the optical image to the camera module 10.

[0066] In this embodiment, refer to Figure 3, the present application is provided with at least one material conveyor belt, each of which is parallel to the horizontal plane provided with the camera module 10 and the projection light source module 20, so as to ensure that the waveguide product 100 to be tested can maintain a stable posture and position during the conveying process, thereby avoiding the detection error caused by tilting or shaking. Exemplarily, the waveguide product 100 to be tested is transferred from the starting position to the position of the feed port through the material conveyor belt. After determining that the feed port senses the waveguide product 100 to be tested, the waveguide product 100 to be tested is pushed to the detection area between the camera module 10 and the projection light source module 20 through the feed port. When the waveguide product 100 to be tested is transferred to the inspection area, the projection light source module 20 determines at least one physical image card 202 corresponding to the waveguide product 100 to be tested as a target image card, and after moving the target image card to the hollow area 200 of the light shielding component 213 through the bidirectional electric track 222, the projection light source 201 projects light to the target image card to form an optical image of the target image card, which is incident on the waveguide product 100 to be tested. At this time, the waveguide product 100 to be tested projects the received optical image of the target image card to the camera module 10.

[0067] It should be noted that, refer to Figure 3 , Figure 3 100 shown is a camera aperture of the camera module 10; Figure 3 The WG (Waveguide) shown represents the waveguide product 100 to be tested set in the present application, and the waveguide product 100 to be tested includes an IG (Input Grating) and an OG (Output Grating). Exemplarily, in the waveguide product 100 to be tested, the input grating effectively couples the incident light representing the optical image into the waveguide product 100 to be tested, while the light representing the optical image in the waveguide product 100 to be tested is effectively coupled out of the waveguide product 100 to be tested through the output grating so as to enter the camera module 10.

[0068] Furthermore, in another embodiment, if the projection light source module 20 determines that there are multiple physical picture cards 202 corresponding to the test requirements of the waveguide product 100 to be tested, the physical picture cards 202 are arranged according to the serial number sequence to obtain a picture card sequence, and the physical picture card 202 with the smallest serial number in the picture card sequence is used as the target picture card, and the target picture card is moved to the hollow area 200 of the shading component 213 through the bidirectional electric track 222. After that, the projection light source 201 projects light to the target picture card to form an optical image of the target picture card. After passing through the waveguide product 100 to be tested and entering the camera module 10, the next physical picture card 202 of the target picture card is used as the next target picture card, and the step of moving the target picture card to the hollow area 200 of the shading component 213 through the bidirectional electric track 222 is returned to execute until all the physical picture cards 202 corresponding to the test requirements are projected.

[0069] In summary, when the optical performance of the waveguide product 100 to be tested is tested based on the physical image card 202, the material conveyor belt will convey the waveguide product 100 to the test position (i.e., the detection area between the camera module 10 and the projection light source module 20). After visual positioning and deviation correction, the bidirectional electric track 222 works to project different physical image cards 202 in turn. After all the physical image cards 202 corresponding to the test requirements are projected and the camera module 10 captures and analyzes the corresponding image cards, the material conveyor belt set in the present application works to move the next waveguide product 100 to be tested to the detection area between the camera module 10 and the projection light source module 20. At the same time, the bidirectional electric track 222 runs in the opposite direction. After it moves to the right position, the second waveguide product 100 to be tested can be tested, thereby significantly improving the detection efficiency of the optical performance of the waveguide product 100 to be tested.

[0070] Further, based on the first embodiment of the optical waveguide detection system of the present application, a second embodiment of the test method of the optical waveguide detection system of the present application is proposed, referring to Figure 1 as well as Figure 4 , Figure 4 It is a flow chart of the second embodiment of the testing method of the optical waveguide detection system of the present application.

[0071] The testing method of the optical waveguide detection system of the present application is applied to any of the above optical waveguide detection systems. The testing method of the optical waveguide detection system of the present application includes the following implementation steps S10 to S20.

[0072] Step S10: after the projection light source module 20 projects the optical image of the physical chart 202 illuminated by the projection light source 201 onto the waveguide product 100 to be tested, the camera module 10 captures the optical image transmitted through the waveguide product 100 to be tested.

[0073] In this embodiment, refer to Figure 1The projection light source 201 in the projection light source module 20 provided in the present application evenly irradiates light onto the physical picture card 202, avoiding shadows or bright spots caused by uneven illumination, thereby ensuring that the picture card image of the physical picture card 202 can be fully converted into a visible optical image, thereby ensuring the image quality of the optical image projected onto the waveguide product 100 to be tested. Next, the optical image of the physical picture card 202 irradiated by the projection light source 201 will be accurately projected onto the waveguide product 100 to be tested through the exit surface of the projection light source module 20 as incident light. It is particularly critical that the projection light source module 20 provided in the present application uses the physical picture card 202 to replace the pixelated projection light machine through the projection light source 201, effectively avoiding the problems caused by image pixelation, and ensuring that the optical image of the object picture card irradiated by the projection light source 201 and projected onto the waveguide product 100 to be tested has clear edges and no pixelation. Next, when the physical image card 202 is converted into an optical image through the uniform illumination of the projection light source 201 and enters the camera module 10 through the waveguide product 100 to be tested, the camera module 10 provided in the present application can quickly and accurately capture the optical image after the waveguide transmission of the waveguide product 100 to be tested, so as to provide accurate and reliable image data for the subsequent detection of the optical performance of the waveguide product 100 to be tested.

[0074] Step S20: using the optical image transmitted via the waveguide product 100 to be tested as a test image of the waveguide product 100 to be tested, and detecting the optical performance of the waveguide product 100 to be tested according to the test image.

[0075] In this embodiment, the camera module 10 provided in the present application uses the optical image transmitted by the waveguide product 100 to be tested as the test image of the waveguide product 100 to detect the optical performance of the waveguide product 100 to be tested, thereby more accurately reflecting the optical performance of the waveguide product 100 to be tested, thereby improving the accuracy of the optical performance detection of the optical waveguide product.

[0076] Furthermore, in some feasible embodiments, the above step S20: detecting the optical performance of the waveguide product 100 to be tested according to the test image may also include steps S201 to S203.

[0077] Step S201: performing an optical waveguide test on the waveguide product 100 to be tested according to the test image, obtaining parameter indicators of the waveguide product 100 to be tested, and detecting whether the parameter indicators are within a preset indicator threshold range.

[0078] In this embodiment, the test requirements of the waveguide product 100 to be tested are determined. When the test requirements are to evaluate the light efficiency, uniformity and color deviation performance of the waveguide product 100 to be tested, the test image is an optical image formed by illuminating a pure color chart obtained by the camera module 10 through the projection light source 201 and transmitted through the waveguide of the waveguide product 100 to be tested, such as Figure 4 As shown, Figure 4 The dotted circle in the figure represents the ROI (Region of Interest) distribution. For example, the luminous flux value L of the projection light source module 20 is obtained, and the luminous flux value L is set on the test image (i.e., the brightness distribution diagram) according to the test requirements. Figure 4 The ROI distribution shown is obtained to obtain the brightness value corresponding to each region of interest; next, the average brightness is calculated for all the brightness values ​​according to the number of regions of interest to obtain the average brightness value N of the brightness distribution diagram, and the product light efficiency of the waveguide product 100 to be tested is calculated according to the product light efficiency algorithm to obtain the product light efficiency value of the waveguide product 100 to be tested, and the product light efficiency value of the waveguide product 100 to be tested is used as the parameter index of the waveguide product 100 to be tested, and it is detected whether the parameter index is within the preset index threshold range, thereby more accurately reflecting the optical performance of the waveguide product 100 to be tested, thereby improving the accuracy of optical performance detection of optical waveguide products.

[0079] It should be noted that the preset indicator threshold range can be customized according to application requirements and this application does not impose any restrictions here. The product light efficiency algorithm is E=N / L, where E represents the product light efficiency value of the waveguide product 100 to be tested, N represents the average brightness value of the brightness distribution diagram, and L represents the luminous flux value of the projection light source module 20.

[0080] In addition, when evaluating the uniformity of the waveguide product 100 to be tested based on the test image of the pure color chart, the product uniformity value of the waveguide product 100 to be tested is used as a parameter indicator of the waveguide product 100 to be tested. An optional uniformity evaluation algorithm for the waveguide product 100 to be tested is U=max / min, wherein U represents the product uniformity value of the waveguide product 100 to be tested, max is the maximum brightness value among all ROIs, and min is the minimum brightness value among all ROIs.

[0081] Furthermore, in another embodiment, when the test requirement is to evaluate the contrast performance of the waveguide product 100 to be tested, the test image is an optical image formed by illuminating a black and white checkerboard pattern card through the projection light source 201 and photographed by the camera module 10, and is an image after being transmitted through the waveguide of the waveguide product 100 to be tested, that is, a product performance picture; next, the average brightness Lv1 of all black grids in the test image and the average brightness Lv2 of all white grids in the test image are calculated, and the average brightness Lv1 and the average brightness Lv2 are calculated according to a preset contrast algorithm to obtain the product contrast of the waveguide product 100 to be tested, and the product contrast can also be used as a parameter indicator of the waveguide product 100 to be tested.

[0082] It should be noted that the preset contrast algorithm is C=Lv2 / Lv1, wherein C represents the product contrast of the waveguide product 100 to be tested, Lv1 represents the average brightness of all black grids in the test image, and Lv2 represents the average brightness of all white grids in the test image.

[0083] Further, in another embodiment, when the test requirement is to evaluate the imaging resolution performance of the waveguide product 100 to be tested, the test image is an optical image formed by irradiating the beveled edge chart by the projection light source 201 and captured by the camera module 10, and then transmitted through the waveguide of the waveguide product 100 to be tested. Exemplarily, after aligning the optical axis of the adjustable aperture 211 in the projection light source module 20 with the optical axis of the camera aperture 100 in the camera module 10, the camera module 10 captures the optical image formed by irradiating the beveled edge chart by the projection light source 201, and obtains the projection image of the beveled edge chart; next, MTF analysis is performed on the projection image and the test image to obtain the MTF projection value of the projection image and the MTF test value of the test image; next, the MTF projection value and the MTF test value of the test image are calculated according to a preset imaging resolution algorithm to obtain the imaging resolution value of the waveguide product 100 to be tested, and the imaging resolution value can also be used as a parameter indicator of the waveguide product 100 to be tested.

[0084] It should be noted that the preset imaging resolution algorithm is as follows:

[0085] MTF_WG=MTF_Tested / MTF_Sys, wherein MTF_WG represents the imaging resolution value of the waveguide product 100 to be tested, MTF_Tested is the MTF test value of the test image, and MTF_Sys represents the MTF projection value of the projected image.

[0086] Step S202: if the parameter index is within the index threshold range, determining that the optical performance of the waveguide product 100 to be tested is qualified;

[0087] Step S203: If the parameter index is not within the index threshold range, it is determined that the optical performance of the waveguide product 100 to be tested is unqualified.

[0088] In this embodiment, when the detected parameter index meets the preset index threshold range, the optical performance of the waveguide product 100 to be tested is determined to be qualified, thereby ensuring the quality and consistency of the waveguide product 100 to be tested. On the contrary, if the detected parameter index does not meet the preset index threshold range, the optical performance of the waveguide product 100 to be tested is determined to be unqualified, which not only improves the detection efficiency of the optical performance of the waveguide product 100 to be tested, but also enhances the controllability of the product quality of the waveguide product 100 to be tested.

[0089] In summary, the present application provides an optical waveguide detection system and its test method, electronic device and storage medium, which significantly improve the accuracy of optical performance detection of optical waveguide products. The optical waveguide detection system provided in the present application includes a camera module 10 and a projection light source module 20. The waveguide product 100 to be tested (i.e., the optical waveguide product) is arranged between the projection light source module 20 and the camera module 10. The projection light source module 20 introduces a high-quality physical image card 202 as a test image source, and after irradiating the physical image card 202 with the projection light source 201 in the projection light source module 20, the optical image of the physical image card 202 is incident on the waveguide product 100 to be tested. That is, the projection light source module 20 provided in the present application adopts the physical image card 20 through the projection light source 201. 2 replaces the pixelated projection light machine, effectively avoiding the problems caused by the pixelation of the image, and ensuring that the optical image of the object chart projected by the projection light source 201 to the waveguide product 100 to be tested has clear edges and no pixelation; next, the camera module 10 collects the optical image transmitted by the waveguide product 100 to be tested as a test image, and detects the optical performance of the waveguide product 100 to be tested based on the test image, so as to more accurately reflect the optical performance of the optical waveguide product, thereby significantly improving the accuracy of the optical performance detection of the optical waveguide product.

[0090] In addition, the present application also provides an electronic device, the electronic device comprising any of the above optical waveguide detection systems, a memory, a processor, and a test program for the optical waveguide detection system stored in the memory and executable on the processor, wherein the test program for the optical waveguide detection system implements the steps of the above optical waveguide detection system test method when executed by the processor. Figure 6 , Figure 6 Schematic diagram of the structure of an electronic device involved in the embodiment of the present application. The electronic device in the embodiment of the present application may be a device for locally running the test method of the optical waveguide detection system.

[0091] like Figure 6As shown, the electronic device of the embodiment of the present application may include: an optical waveguide detection system, a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface).

[0092] The memory 1005 is arranged on the electronic device body, and a program is stored on the memory 1005, and the program implements the corresponding operation when it is executed by the processor 1001. The memory 1005 is also used to store parameters for use by the electronic device. The memory 1005 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0093] Those skilled in the art will understand that Figure 6 The electronic device structure shown in the figure does not constitute a limitation of the electronic device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0094] like Figure 6 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a test program of the optical waveguide detection system.

[0095] exist Figure 6 In the electronic device shown, the processor 1001 can be used to call the test program of the optical waveguide detection system stored in the memory 1005 and execute the steps of the test method of the optical waveguide detection system as described above.

[0096] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, which is a computer-readable storage medium, and a test program of the optical waveguide detection system is stored on the computer-readable storage medium. When the test program of the optical waveguide detection system is executed by a processor, the steps of the above-mentioned test method of the optical waveguide detection system are implemented.

[0097] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0098] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0099] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium such as ROM / RAM, a disk, or an optical disk as described above, and includes a number of instructions for enabling an electronic device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0100] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An optical waveguide detection system, characterized in that: The optical waveguide detection system includes a camera module and a projection light source module, the waveguide product to be tested is arranged between the projection light source module and the camera module, and the projection light source module includes a projection light source and a physical chart card; The projection light source module is configured to project the optical image of the physical chart after being illuminated by the projection light source onto the waveguide product to be tested; The camera module is configured to capture the optical image transmitted through the waveguide product to be tested, and use the optical image transmitted through the waveguide product to be tested as a test image of the waveguide product to be tested, and detect the optical performance of the waveguide product to be tested based on the test image.

2. The optical waveguide detection system according to claim 1, characterized in that: The projection light source module also includes an optical control unit, a picture card transmission unit and a filter unit; The filter unit is arranged between the projection light source and the image card transmission unit, the physical image card is arranged between the image card transmission unit and the optical control unit, and the physical image card is fixed on a side of the image card transmission unit away from the filter unit.

3. The optical waveguide detection system according to claim 2, characterized in that: The optical control unit at least includes an adjustable diaphragm, a collimation system and a shading component; The collimation system is arranged between the adjustable aperture and the shading component, the shading component is arranged on the side close to the physical image card, the camera module is mounted on the side of the adjustable aperture away from the collimation system, and the optical axis of the adjustable aperture coincides with the optical axis in the camera aperture of the camera module.

4. The optical waveguide detection system according to claim 3, characterized in that: The shading assembly includes a first shading plate, a hollow area, and a second shading plate, and the first shading plate is the same as the second shading plate; The first light shielding plate and the second light shielding plate are respectively arranged on both sides of the hollow area, and the first light shielding plate, the hollow area and the second light shielding plate are all arranged on the same horizontal line.

5. The optical waveguide detection system according to claim 4, characterized in that: The image card transfer unit is a bidirectional electric track provided with a physical image card belt. There are multiple physical image cards, and each of the physical image cards is evenly fixed on the physical image card belt at a preset interval. The target image card is exposed from the hollow area, the central axis of the projection light source and the target image card overlaps with the central axis of the hollow area respectively, and the target image card is any one of the multiple physical image cards.

6. The optical waveguide detection system according to claim 1, characterized in that: The optical waveguide detection system further includes a material conveyor belt, which is parallel to a horizontal plane on which the camera module and the projection light source module are arranged; The material conveyor belt is configured to convey the waveguide product to be tested between the camera module and the projection light source module, so that the waveguide product to be tested receives the optical image of the physical picture card after being illuminated by the projection light source, and projects the optical image to the camera module.

7. A method for testing an optical waveguide detection system, characterized in that: The testing method of the optical waveguide detection system is applied to the optical waveguide detection system according to any one of claims 1 to 6, and the testing method of the optical waveguide detection system comprises: After the projection light source module projects the optical image of the physical chart illuminated by the projection light source onto the waveguide product to be tested, the camera module collects the optical image transmitted through the waveguide product to be tested; The optical image transmitted through the waveguide product to be tested is used as a test image of the waveguide product to be tested, and the optical performance of the waveguide product to be tested is detected based on the test image.

8. The testing method of the optical waveguide detection system according to claim 7, characterized in that: The step of detecting the optical performance of the waveguide product to be tested according to the test image comprises: Performing an optical waveguide test on the waveguide product to be tested according to the test image to obtain parameter indicators of the waveguide product to be tested, and detecting whether the parameter indicators are within a preset indicator threshold range; If the parameter index is within the index threshold range, it is determined that the optical performance of the waveguide product to be tested is qualified; If the parameter index is not within the index threshold range, it is determined that the optical performance of the waveguide product to be tested is unqualified.

9. An electronic device, characterized in that: The electronic device comprises the optical waveguide detection system according to any one of claims 1 to 6, a memory, a processor, and a test program for the optical waveguide detection system stored in the memory and executable on the processor, and the processor implements the steps of the test method for the optical waveguide detection system according to any one of claims 7 to 8 when executing the test program for the optical waveguide detection system.

10. A storage medium, the storage medium being a computer-readable storage medium, characterized in that: The computer-readable storage medium stores a test program for an optical waveguide detection system, and when the test program for an optical waveguide detection system is executed by a processor, the steps of the test method for an optical waveguide detection system according to any one of claims 7 to 8 are implemented.

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