AR optical waveguide detection system and AR optical waveguide detection method

Abstract

The invention discloses an AR optical waveguide detection system and an AR optical waveguide detection method.The optical waveguide is provided with a coupling-in area and a coupling-out area which are located on the same side, the AR optical waveguide detection system comprises a light source assembly, a projection assembly and an imaging test assembly, the projection assembly comprises a first lens set and an exit pupil end, and the exit pupil end is coupled with the coupling-in area; the imaging test assembly comprises an entrance pupil end, a second lens group and an imaging assembly, and the entrance pupil end is coupled with the coupling-out area; the projection assembly further comprises a first light path turning element which is located in front of the exit pupil end and used for turning light emitted by the first lens group and then enabling the light to enter the coupling-in area, and / or the imaging test assembly further comprises a second light path turning element which is located behind the entrance pupil end and used for turning the light emitted by the second lens group to enter the coupling-in area. And the second lens group is used for reflecting the light emitted from the coupling-out area and then enabling the light to enter the second lens group and the imaging assembly. When the optical waveguide detection system in the embodiment is debugged, structural interference between the projection assembly and the test assembly can be reduced.

Description

Technical Field

[0001] The present application relates to the field of optical detection technology, and in particular to an AR optical waveguide detection system and an AR optical waveguide detection method. Background Art

[0002] Augmented Reality (AR) glasses are an important part of smart wearable devices and are widely used in games, education, navigation, industrial design and other fields. Optical waveguide AR glasses are an optical system composed of an optical machine and an optical waveguide. The performance of the optical waveguide directly affects the image display quality of AR glasses. High-quality optical waveguides can ensure that the image provided by the optical machine remains clear and has its original contrast during transmission. Therefore, it is very important to test the image transmission performance of the optical waveguide during the production process.

[0003] In the related art, the image transmission performance detection system of the optical waveguide consists of two parts: a projection optical machine and a test module. In the detection system, the optical axes of the projection optical machine and the test module are not parallel to the coupling-in end and the coupling-out end of the optical waveguide. Since the coupling-in end and the coupling-out end of the optical waveguide in the AR glasses are on the same side, when the distance between the projection optical machine and the test module and the optical waveguide increases, the interval between the projection optical machine and the test module will become smaller, which makes it easy for the projection optical machine and the test module to have structural interference during debugging, thereby increasing the design difficulty of the detection system. Summary of the invention

[0004] The embodiments of the present application provide an AR optical waveguide detection system and an AR optical waveguide detection method, so that when debugging the AR optical waveguide detection system, the probability of structural interference between the projection component and the imaging test component can be reduced.

[0005] In a first aspect, an embodiment of the present application provides an AR optical waveguide detection system for detecting image transmission of an optical waveguide, wherein the optical waveguide has an incoupling region and an outcoupling region located on the same side, and the AR optical waveguide detection system includes:

[0006] A light source assembly, configured to emit a first light beam;

[0007] A projection assembly, the projection assembly at least comprising a first lens group and an exit pupil end, the exit pupil end being coupled to the coupling-in area, the projection assembly being used to receive the first light and emit a second light to the coupling-in area through the exit pupil end;

[0008] An imaging test assembly, the imaging test assembly at least comprising an entrance pupil end, a second lens group and an imaging assembly, the entrance pupil end is coupled with the outcoupling region, and the imaging test assembly is used to receive a third light output from the outcoupling region through the entrance pupil end;

[0009] In which, the projection component also includes a first light path turning element, which is located before the exit pupil end and is used to fold the light path emitted by the first lens group and then make it incident on the coupling-in area, and / or, the imaging test component also includes a second light path turning element, which is located after the entrance pupil end and is used to fold the third light emitted from the coupling-out area and make it incident on the second lens group and the imaging component in sequence.

[0010] In some embodiments of the present application, the first light path turning element and / or the second light path turning element is a reflector or a prism.

[0011] In some embodiments of the present application, the first optical path turning element has a first reflecting surface, and a normal line of the first reflecting surface has a first acute angle with the optical axis of the first lens group; the second optical path turning element has a second reflecting surface, and a normal line of the second reflecting surface has a second acute angle with the optical axis of the second lens group.

[0012] In some embodiments of the present application, the first acute angle is 60°, and the second acute angle is 45°.

[0013] In some embodiments of the present application, the light source assembly includes a light source and a test card, the test card is located on the light emitting side of the light source, and the light source assembly is used to emit light carrying a test image to the first lens group.

[0014] In some embodiments of the present application, the coupling-in region has a first field angle, and the exit angle of the second light emitted by the projection assembly through the exit pupil end is greater than or equal to the first field angle; and / or,

[0015] The outcoupling region has a second field of view angle, and the incident angle of the third light incident on the imaging test component through the entrance pupil end is greater than or equal to the second field of view angle.

[0016] In some embodiments of the present application, the first lens group of the projection module has a first optical axis, and the first optical axis is arranged at an acute angle to the optical axis of the coupling-in region.

[0017] In a second aspect, an embodiment of the present application further provides an AR optical waveguide detection method, wherein the AR optical waveguide detection method uses the AR optical waveguide detection system described in any of the above embodiments to detect the optical waveguide, and the AR optical waveguide detection method includes:

[0018] The exit pupil end is coupled with the coupling-in region, and / or the entrance pupil end is coupled with the outcoupling region;

[0019] The light source assembly emits a first light to the projection assembly, the projection assembly receives and outputs the second light, the second light is transmitted to the coupling-in area, and is transmitted to the coupling-out area through the optical waveguide, and the coupling-out area outputs the third light to be collected and imaged by the imaging test assembly;

[0020] The imaging test component analyzes the imaging result.

[0021] In some embodiments of the present application, the angle between the first optical path turning element and the optical axis of the coupling-in region is adjusted so that the first optical path turning element is coupled to the coupling-in region; and / or,

[0022] The angle between the second light path turning element and the optical axis of the outcoupling region is adjusted so that the second light path turning element is coupled to the outcoupling region.

[0023] Based on the AR optical waveguide detection system and the AR optical waveguide detection method in the embodiments of the present application, the present embodiment sets an optical path turning element in the AR optical waveguide detection system. After the light is emitted, it can be transmitted through the optical path turning element for reverse transmission, thereby changing the straight up and down transmission mode of the light in the AR optical waveguide detection system, and can realize the flexible configuration of the AR optical waveguide detection system under strict space constraints. That is to say, when the optical waveguide is detected, even if the coupling-in area and the coupling-out area of ​​the optical waveguide are on the same side, the present embodiment can change the extension direction of the optical axis of the projection component and / or the imaging test component by adjusting the optical path turning element, so that when the distance between the projection component and the imaging test component and the optical waveguide increases, the probability of interference between the projection component and the imaging test component is reduced, and the flexibility and adaptability of the AR optical waveguide detection system are increased, which is conducive to adapting to the design and manufacturing requirements of complex AR systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of an AR optical waveguide detection system and an optical waveguide in one embodiment of the present application;

[0026] Figure 2 This is a schematic structural diagram of an AR optical waveguide detection system and an optical waveguide in another embodiment of the present application;

[0027] Figure 3FIG. 1 is a partial structural diagram of an AR optical waveguide detection system and an optical waveguide in another embodiment of the present application.

[0028] Reference numerals:

[0029] 100. AR optical waveguide detection system;

[0030] 10. Light source assembly; 11. First light; 12. Second light; 13. Third light;

[0031] 20. projection assembly; 21. first lens group; 22. exit pupil end; 23. first optical path turning element; 231. first reflection surface;

[0032] 30. Imaging test assembly; 31. Entrance pupil end; 32. Second lens group; 33. Imaging assembly; 34. Second optical path turning element; 341. Second reflection surface;

[0033] 40. Lens tube;

[0034] 200, optical waveguide; 51, coupling-in region; 52, coupling-out region;

[0035] L1, first optical axis; L2, second optical axis. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will be described clearly and completely in conjunction with the drawings 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.

[0037] In the related art, the image transmission performance detection system of the optical waveguide consists of two parts: a projection optical machine and a test module. In the detection system, at the coupling-in end and the coupling-out end of the optical waveguide, the optical axes of the projection optical machine and the test module are not parallel. Since the coupling-in end and the coupling-out end of the optical waveguide in the AR glasses are on the same side, when the distance between the projection optical machine and the test module and the optical waveguide increases, the interval between the projection optical machine and the test module will become smaller, so that the projection optical machine and the test module often face the problem of insufficient space during debugging. The two are prone to structurally interfere with each other, thereby increasing the complexity and design difficulty of the detection system in debugging.

[0038] Regarding the above situation, first of all, please refer to Figure 1-Figure 2The present application proposes an AR optical waveguide detection system 100. The performance of the optical waveguide 200 will directly affect the image display quality of the AR glasses. A high-quality optical waveguide 200 can ensure that the image remains clear and has its original contrast during transmission. The optical waveguide 200 has a coupling-in area 51 and a coupling-out area 52 located on the same side. External image information is input into the optical waveguide 200 through the coupling-in area 51, and after transmission, it is output from the coupling-out area 52. The AR optical waveguide detection system 100 in this embodiment can be used to detect the image transmission quality of the optical waveguide 200.

[0039] The AR optical waveguide detection system 100 includes a light source assembly 10, a projection assembly 20 and an imaging test assembly 30. The projection assembly 20 includes at least a first lens group 21 and an exit pupil end 22. The exit pupil end 22 of the projection assembly 20 is coupled with the coupling-in area 51. The projection assembly 20 is used to receive the first light 11 and emit the second light 12 to the coupling-in area 51 through the exit pupil end 22. The imaging test assembly 30 includes at least an entrance pupil end 31, a second lens group 32 and an imaging assembly 33. The entrance pupil end 31 of the imaging test assembly 30 is coupled with the coupling-out area 52. The imaging test assembly 30 is used to receive the third light 13 output from the coupling-out area 52 through the entrance pupil end 31. Among them, the imaging assembly 33 may include a human eye lens with an aperture in front and an imaging brightness colorimeter.

[0040] Specifically, the light source assembly 10 is used to emit a first light 11 carrying a test image, the projection assembly 20 is used to receive the first light 11, and output a second light 12 from the exit pupil end 22 to transmit to the coupling zone 51 of the optical waveguide 200, the optical waveguide 200 receives the second light 12, and outputs a third light 13 from the coupling zone 52 to transmit to the entrance pupil end 31 of the imaging test assembly 30, the entrance pupil end 31 receives the third light 13, and the imaging assembly 33 can measure the quality of the test image after transmission. Among them, coupling generally refers to the situation where various parts within the system are mutually dependent, mutually influenced, and mutually restricted, that is, the interactive connection relationship between two or more components or parts, the exit pupil end 22 is coupled with the coupling zone 51, that is, the exit pupil end 22 can transmit the second light 12 to the coupling zone 51; the entrance pupil end 31 is coupled with the coupling zone 52, that is, the coupling zone 52 can transmit the third light 13 to the entrance pupil end 31.

[0041] The projection assembly 20 also includes a first optical path turning element 23, which is located before the exit pupil end 22, and is used to fold the optical path of the light emitted by the first lens group 21 and then make it incident on the coupling-in area 51; and / or, the imaging test assembly 30 also includes a second optical path turning element 34, which is located after the entrance pupil end 31, and is used to fold the optical path of the light passing through the coupling-out area 52 and then make it incident on the second lens group 32 and the imaging assembly 33 in sequence, that is, the third light 13 passes through the entrance pupil end 31, the second optical path turning element 34, the second lens group 32 and the imaging assembly 33 in sequence.

[0042] Specifically, in the AR optical waveguide detection system 100, the projection component 20 includes at least one first optical path turning element 23, and the first optical path turning element 23 can change the transmission path of the light emitted from the first lens group 21, so that the light forms the second light 12 after the optical path is folded and is transmitted to the coupling-in area 51; or, the imaging test component 30 includes at least one second optical path turning element 34, and the second optical path turning element 34 can change the transmission path of the third light 13 output from the coupling-out area 52, so that the third light 13 is sequentially transmitted to the second lens group 32 and the imaging component 33 after the optical path is folded; or, the projection component 20 includes at least one first optical path turning element 23, and the imaging test component 30 includes at least one second optical path turning element 34, and the two optical path turning elements are used to change the transmission paths of the second light 12 and the third light 13, respectively.

[0043] It should be noted that, in the embodiment of the present application, by setting an optical path turning element in the projection assembly 20 and / or the imaging test assembly 30, the light can be transmitted through the optical path turning element after being emitted, thereby changing the straight-up and straight-down transmission mode of the light in the AR optical waveguide detection system 100, and can realize the flexible configuration of the AR optical waveguide detection system 100 under strict space constraints. That is to say, when the optical waveguide 200 is detected, even if the coupling-in area 51 and the coupling-out area 52 of the optical waveguide 200 are on the same side, the present embodiment can adjust the optical path turning element to change the direction of the light. The turning element changes the extension direction of the optical axes of the projection assembly 20 and the imaging test assembly 30, so that when the distance between the projection assembly 20 and the imaging test assembly 30 and the optical waveguide 200 increases, the probability of interference between the projection assembly 20 and the imaging test assembly 30 is reduced, which can not only reduce the structural size of the projection assembly 20 and / or the imaging test assembly 30, but also reduce the restriction on the outer diameter of the optical system after the folding, and increase the flexibility and adaptability of the AR optical waveguide detection system 100, so as to facilitate the design and manufacturing requirements of complex augmented reality (AR) systems.

[0044] In some embodiments of the present application, the first lens group 21 has a first optical axis L1, and the first optical axis L1 is set at an acute angle to the optical axis H1 of the coupling-in area 51. That is to say, in the projection assembly 20 of the present embodiment, the light transmission direction is not in the same straight line direction, and the light transmission direction in the projection assembly 20 will change. Therefore, even if the light source assembly 10 is located on the side of the optical waveguide 200, the first light 11 emitted by the light source assembly 10 can be transmitted through the first lens group 21 first, and then transmitted to the coupling-in area 51 of the optical waveguide 200 through the first optical path turning element 23. Similarly, it can be known that the second lens group 32 has a second optical axis L2, and the second optical axis L2 can also be set at an acute angle to the optical axis H2 of the coupling-out area 52.

[0045] In some embodiments, Figure 2 As shown, the AR optical waveguide detection system 100 also includes a lens barrel 40, and the light source assembly 10 and the projection assembly 20 are both integrated and arranged inside the lens barrel 40. The projection assembly 20 includes a first light path turning element 23, thereby reducing the space occupied by the projection assembly 20 in the AR optical waveguide detection system 100 without affecting the transmission of the first light 11. Among them, the light source assembly 10 is used to provide a first light 11 carrying a test image, and the projection assembly 20 is used to transmit the first light 11 and output a second light 12, that is, the first light 11 passes through the first lens group 21, and forms the second light 12 input coupling area 51 under the reflection of the first light path turning element 23; the imaging test assembly 30 can receive the third light 13 carrying the test image information, and measure the quality of the test image after transmission. Alternatively, by the same token, the imaging test component 30 may include a second optical path turning element 34, a second lens group 32, an imaging component 33 and a housing, the imaging component 33 includes a humanoid eye lens with an aperture in front, an imaging brightness colorimeter, and the second optical path turning element 34, the second lens group 32 and the imaging component 33 are all integrated inside the housing, thereby reducing the space occupied by the imaging test component 30 in the AR optical waveguide detection system 100 without affecting the transmission of the third light 13.

[0046] Specifically, the light source assembly 10 may include a light source and a test card (not shown in the figure), the test card contains a test image, the test card is placed at the light outlet of the light source, and the light source assembly 10 may emit light carrying the test image to the first lens group 21. The light source may include an integrating sphere light source, an LED, an OLED, or an LCD, etc., for presenting various test images on the test card, and the multiple test images may correspond to different optical properties of the optical waveguide 200. For example, the test image may include a checkerboard image (for contrast test), a line pair image (for resolution test), and a cross or bevel image (for measurement of the MTF curve).

[0047] See also Figure 2-Figure 3 In some embodiments of the present application, the first optical path turning element 23 and / or the second optical path turning element 34 are reflectors or prisms, and both the reflectors and prisms can reflect the second light 12 and the third light 13, so as to reflect the second light 12 from the first lens group 21 to the coupling region 51 of the optical waveguide 200, and reflect the third light 13 from the entrance pupil end 31 to the second lens group 32. The reflectors and prisms can be plane mirrors, beam splitters, curved reflectors, or polygonal prisms.

[0048] Please continue to see Figure 2-Figure 3 In some embodiments of the present application, the first optical path turning element 23 has a first reflecting surface 231, and there is a first acute angle between the normal of the first reflecting surface 231 and the optical axis of the first lens group 21 (i.e., the first optical axis L1), that is, there is an angle between the normal of the first reflecting surface 231 and the first optical axis L1.

[0049] Specifically, the normal of the first reflection surface 231 is not perpendicular to the first optical axis L1, and the first reflection surface 231 can reflect the light incident from the first lens group 21. Even if the entire light source assembly 10 is located on the side of the coupling-in area 51, the first reflection surface 231 can also reflect the light passing through the first lens group 21 from the side of the coupling-in area 51 to the coupling-in area 51, thereby allowing the position interval between the projection assembly 20 and the imaging test assembly 30 to be adjusted, thereby reducing the structural interference between the projection assembly 20 and the imaging test assembly 30 during the detection of the AR optical waveguide detection system 100.

[0050] Similarly, in some embodiments, the optical axis of the second lens group is the second optical axis L2, the second optical path turning element 34 has a second reflecting surface 341, and the normal of the second reflecting surface 341 has a second acute angle with the optical axis of the second lens group (i.e., the second optical axis L2), that is, the normal of the second reflecting surface 341 is set at an angle to the second optical axis L2. Even if the imaging component 33 is located on the side of the outcoupling area 52, the second reflecting surface 341 can also reflect the second light 12 from the outcoupling area 52 to the second lens group 32 and the imaging component 33, thereby allowing the setting positions of the projection component 20 and the imaging test component 30 to be separated, thereby reducing the structural interference between the projection component 20 and the imaging test component 30 during the detection of the AR optical waveguide detection system 100.

[0051] Furthermore, in some embodiments of the present application, the first acute angle is 60° and the second acute angle is 45°, thereby allowing the projection assembly 20 and the imaging test assembly 30 to be further spaced apart, thereby reducing structural interference between the projection assembly 20 and the imaging test assembly 30 during detection of the AR optical waveguide detection system 100, and at the same time reducing restrictions on the outer diameters of the folded projection assembly 20 and the imaging test assembly 30, thereby reducing the design difficulty of the AR optical waveguide detection system 100.

[0052] In some embodiments of the present application, the coupling region 51 has a first field of view angle. It should be noted that the size of the field of view angle can determine the field of view of the optical instrument lens. The larger the field of view angle, the larger the field of view and the smaller the optical magnification. In other words, the portion of the target object that exceeds the field of view angle will not be recorded in the lens.

[0053] The exit angle of the second light 12 emitted from the projection component 20 through the exit pupil end 22 is greater than or equal to the first field of view angle, that is, the exit angle of the second light 12 emitted from the exit pupil end 22 to the coupling area 51 is greater than or equal to the first field of view angle. Therefore, within the receiving range of the coupling area 51, all field of view angles of the coupling area 51 can receive the test image information transmitted by the exit pupil end 22 of the projection component 20.

[0054] The out-coupling area 52 has a second field of view angle. In some embodiments, the incident angle of the third light 13 incident on the imaging test component 30 through the entrance pupil end 31 is greater than or equal to the second field of view angle. That is, the entrance pupil end 31 of the imaging test component 30 has a detection field of view angle, and the detection field of view angle is greater than or equal to the second field of view angle. Therefore, the detection field of view angle of the entrance pupil end 31 can cover the second field of view angle of the out-coupling area 52. The detection field of view angle of the entrance pupil end 31 can receive the test image information transmitted by the out-coupling area 52 at all locations, so that the imaging test component 30 can detect all test images transmitted by the optical waveguide 200 to ensure the accuracy of the test image acquisition.

[0055] In a second aspect, an embodiment of the present application further provides an AR optical waveguide detection method, wherein the AR optical waveguide detection method uses the AR optical waveguide detection system 100 described in any of the above embodiments to detect the optical waveguide 200, and the AR optical waveguide detection method includes:

[0056] S101 , coupling the exit pupil end 22 with the coupling-in region 51 , and / or coupling the entrance pupil end 31 with the coupling-out region 52 .

[0057] Specifically, the positions and angles of the projection assembly 20 and the imaging test assembly 30 are adjusted according to the positions of the coupling-in area 51 and the coupling-out area 52 on the optical waveguide 200 . In the AR optical waveguide detection system 100, the projection component 20 includes a first optical path turning element 23, which can change the transmission path of the light output by the first lens group 21, so that the second light 12 is transmitted to the coupling-in area 51; or, the imaging test component 30 includes a second optical path turning element 34, which can change the transmission path of the third light 13 output by the coupling-out area 52, so that the third light 13 is transmitted to the imaging test component 30; or, the projection component 20 includes at least one first optical path turning element 23, and the imaging test component 30 includes at least one second optical path turning element 34, and the two optical path turning elements are respectively used to change the transmission paths of the second light 12 and the third light 13. Therefore, the AR optical waveguide detection system 100 can reduce the probability of structural interference between the projection component 20 and the imaging test component 30 through the setting of the optical path turning element 41 when the optical waveguide 200 is detected.

[0058] The projection component 20 selects the test card and lights up the integrating sphere light source. The projection component 20 can output the second light 12 to the coupling-in area 51 more accurately, and the imaging test component 30 can receive all the third light 13 output from the coupling-out area 52. Taking the optical path turning element 41 as a reflector as an example, the projection component 20 includes a reflector. According to the position of the coupling-in area 51 on the optical waveguide 200, the angle between the reflector and the optical axis H1 of the coupling-in area 51 is adjusted, so that after the exit pupil end 22 of the projection component 20 is coupled with the coupling-in area 51, within the detection range of the coupling-in area 51, all the field angles of the coupling-in area 51 can receive the second light 12.

[0059] S102, the light source assembly 10 emits a first light 11 to the projection assembly 20, the projection assembly 20 receives and outputs a second light 12, the second light 12 is transmitted to the coupling-in area 51, and is transmitted to the coupling-out area 52 through the optical waveguide 200, and the coupling-out area 52 outputs a third light 13 which is captured by the imaging test assembly 30.

[0060] S103 , the imaging test component 30 analyzes the imaging result, and analyzes the image transmission performance of the optical waveguide 200 based on the imaging result of the imaging test component 30 .

[0061] In some embodiments of the present application, the angle between the first optical path turning element 23 and the first optical axis L1 is adjusted so that the first optical path turning element 23 is coupled to the coupling-in region 51; the angle between the second optical path turning element 34 and the second optical axis L2 is adjusted so that the second optical path turning element 34 is coupled to the coupling-out region 52. Preferably, the first optical path turning element 23 and the second optical path turning element 34 are both reflectors.

[0062] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An AR optical waveguide detection system for detecting image transmission of an optical waveguide, wherein the optical waveguide has an incoupling region and an outcoupling region located on the same side, characterized in that: The AR optical waveguide detection system comprises: A light source assembly, configured to emit a first light beam; A projection assembly, the projection assembly at least comprising a first lens group and an exit pupil end, the exit pupil end being coupled to the coupling-in area, the projection assembly being used to receive the first light and emit a second light to the coupling-in area through the exit pupil end; An imaging test assembly, the imaging test assembly at least comprising an entrance pupil end, a second lens group and an imaging assembly, the entrance pupil end is coupled with the outcoupling region, and the imaging test assembly is used to receive a third light output from the outcoupling region through the entrance pupil end; In which, the projection component also includes a first light path turning element, which is located before the exit pupil end and is used to fold the light path emitted by the first lens group and then make it incident on the coupling-in area, and / or, the imaging test component also includes a second light path turning element, which is located after the entrance pupil end and is used to fold the third light emitted from the coupling-out area and make it incident on the second lens group and the imaging component in sequence.

2. The AR optical waveguide detection system according to claim 1, characterized in that: The first light path turning element and / or the second light path turning element is a reflector or a prism.

3. The AR optical waveguide detection system according to claim 1 or 2, characterized in that: The first optical path turning element has a first reflecting surface, and a normal line of the first reflecting surface and an optical axis of the first lens group form a first acute angle; The second optical path turning element has a second reflecting surface, and a second acute angle is formed between a normal line of the second reflecting surface and the optical axis of the second lens group.

4. The AR optical waveguide detection system according to claim 3, characterized in that: The first acute angle is 60°, and the second acute angle is 45°.

5. The AR optical waveguide detection system according to claim 1, characterized in that: The light source assembly includes a light source and a test card, wherein the test card is located at the light emitting side of the light source, and the light source assembly is used to emit light carrying a test image to the first lens group.

6. The AR optical waveguide detection system according to claim 1, characterized in that: The coupling-in area has a first viewing angle, and the exit angle of the second light emitted by the projection assembly through the exit pupil end is greater than or equal to the first viewing angle; and / or, The outcoupling region has a second field of view angle, and the incident angle of the third light incident on the imaging test component through the entrance pupil end is greater than or equal to the second field of view angle.

7. The AR optical waveguide detection system according to claim 1, characterized in that: The first lens group has a first optical axis, and the first optical axis is arranged at an acute angle with the optical axis of the coupling-in region.

8. An AR optical waveguide detection method, characterized in that: The AR optical waveguide detection method uses the AR optical waveguide detection system described in any one of claims 1 to 7 to detect the optical waveguide, and the AR optical waveguide detection method includes: The exit pupil end is coupled with the coupling-in region, and the entrance pupil end is coupled with the outcoupling region; The light source assembly emits a first light to the projection assembly, the projection assembly receives and outputs the second light, the second light is transmitted to the coupling-in area, and is transmitted to the coupling-out area through the optical waveguide, and the coupling-out area outputs the third light to be collected and imaged by the imaging test assembly; The imaging test component analyzes the imaging result.

9. The optical waveguide detection method according to claim 8, characterized in that: adjusting the angle between the first light path turning element and the optical axis of the coupling-in region so that the first light path turning element is coupled to the coupling-in region; and / or, The angle between the second light path turning element and the optical axis of the outcoupling region is adjusted so that the second light path turning element is coupled to the outcoupling region.

Images