NED product inspection apparatus and method of inspection thereof

Abstract

The application discloses a NED product detection device, comprising: a geometric alignment station end for detecting the posture and position of the NED product in geometric space; a detection station end for detecting the optical performance of the NED product; a multi-axis platform for fixing the NED product and adjusting the posture and position of the NED product according to the detection result of the geometric alignment station end; a feeding mechanism connected to the multi-axis platform for driving the NED product to move in the Y-axis direction to switch between the geometric alignment station end and the detection station end; and a station switching mechanism connected to the feeding mechanism for driving the NED product to move in the X-axis direction perpendicular to the Y-axis direction to switch between the stations of the geometric alignment station end. The device can solve the problems in the prior art that the detection efficiency is low, the detection accuracy is poor, consistent detection standards cannot be achieved, and multiple NED product detection requirements cannot be met simultaneously.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical performance detection of NED products such as VR, AR, etc., and in particular to a NED product detection device and a NED product detection method. BACKGROUND

[0002] With the development of science and technology, virtual reality (VR) and augmented reality products have applied many new technologies, which gradually attract people's attention to near-eye displays (NED). Before that, NED system manufacturers have no consistent standards and automated ways to test the quality of near-eye displays, which are generally judged by manual methods.

[0003] However, as NEDs transition from novelty products to mainstream products, achieving reliable and predictable performance will become increasingly critical. For consumer-grade NED systems, it is necessary to ensure consistent customer experience and ensure that products meet the brand reputation and performance standards of the manufacturer.

[0004] In the development of VR / AR components, the display and optical devices of the head-mounted device are mainly considered, however, the field of view in the current head-mounted device is very small, which limits the user's immersion in the image. Achieving this effect through optical devices means challenges in ergonomics, manufacturing size, weight, and scalability. In addition, in terms of visual experience, AR / VR displays project visual information to a position very close to the human eye, covering the full field of view of the user, however, this proximity between the display and the human eye also magnifies the display defects that the user would not normally be able to detect when viewing at a distance. Therefore, near-eye display defects have a significant impact on the user's experience, which can hinder the visualization effect and device operability.

[0005] At present, it is difficult to achieve accurate optical performance detection through manual detection, and it is impossible to achieve consistent detection standards, and the detection efficiency is low, and it is impossible to meet the detection requirements of various NED products. SUMMARY

[0006] In order to overcome the defects of the prior art, the embodiments of the present application provide a NED product detection device and a detection method thereof, which can solve the problems of low detection efficiency, poor detection accuracy, inability to achieve consistent detection standards, and inability to meet the detection requirements of various NED products in the prior art by manually detecting NED products.

[0007] Specifically, the embodiment of the present application provides a NED product detection device, comprising: a detection machine; a fixed crossbeam arranged on the detection machine; a geometric alignment station end and a detection station end arranged on two sides of the fixed crossbeam respectively, the geometric alignment station end is used for detecting the posture and position of the NED product in a geometric space, and the detection station end is used for detecting the optical performance of the NED product; a multi-axis platform, used for fixing the NED product and adjusting the posture and position of the NED product according to the detection result of the geometric alignment station end; a feeding mechanism, connected with the multi-axis platform and used for driving the NED product to move in a Y-axis direction, so as to switch between the geometric alignment station end and the detection station end; and a station switching mechanism, connected with the feeding mechanism and used for driving the NED product to move in an X-axis direction perpendicular to the Y-axis direction, so as to switch between various stations of the geometric alignment station end.

[0008] In an embodiment of the present application, the NED product is an AR product, and the geometric alignment station end comprises: a laser line scanning profile station, used for detecting the relative height of the AR product and the deviation in the pitch angle and the roll angle; and a positioning camera station, used for detecting the deviation in the azimuth angle of the AR product and the coordinate position deviation.

[0009] In an embodiment of the present application, the NED product is a VR product, and the geometric alignment station end comprises: a collimator station, used for detecting the deviation in the pitch angle and the roll angle of the VR product; a laser line scanning profile station, used for detecting the relative height of the VR product; and a positioning camera station, used for detecting the deviation in the azimuth angle of the VR product and the coordinate position deviation.

[0010] In an embodiment of the present application, the detection station end comprises: a main detection camera station, used for detecting the optical performance of the NED product, including FOV, brightness, resolution and contrast.

[0011] In an embodiment of the present application, the NED product is an AR light machine, and the detection station end further comprises: a projector assembly, comprising two groups of projection sensors with optical axes located on the X-axis direction and the Y-axis direction respectively, used for detecting the deviation in the pitch angle and the roll angle, the coordinate position deviation and the relative height of the AR light machine.

[0012] In addition, the embodiment of the present application further provides a NED product detection method, which is suitable for the NED product detection device of any one of the above-mentioned embodiments, and includes the following steps: installing a NED product on a multi-axis platform; moving the NED product in a Y-axis direction by a feeding mechanism to reach a geometric alignment station end; moving the NED product in an X-axis direction perpendicular to the Y-axis direction by a station switching mechanism to switch between various stations at the geometric alignment station end, and detect the posture and position of the NED product in a geometric space; feeding back the detection result of the geometric alignment station end to the multi-axis platform to adjust the posture and position of the NED product according to the detection result; moving the NED product in the Y-axis direction by the feeding mechanism to reach a detection station end to detect the optical performance of the NED product.

[0013] In an embodiment of the present application, when the NED product is an AR product, the step of moving the NED product in the X-axis direction perpendicular to the Y-axis direction by the station switching mechanism to switch between various stations at the geometric alignment station end, and detecting the posture and position of the NED product in the geometric space includes: moving the NED product to a laser line scanning profile station by the station switching mechanism to detect the relative height of the AR product and the offset in the pitch angle and roll angle; and moving the NED product to a positioning camera station by the station switching mechanism to detect the offset in the azimuth angle and the coordinate position offset of the AR product.

[0014] In an embodiment of the present application, when the NED product is a VR product, the step of moving the NED product in the X-axis direction perpendicular to the Y-axis direction by the station switching mechanism to switch between various stations at the geometric alignment station end, and detecting the posture and position of the NED product in the geometric space includes: moving the NED product to a collimator station by the station switching mechanism to detect the offset of the VR product in the pitch angle and roll angle; moving the NED product to a laser line scanning profile station by the station switching mechanism to detect the relative height of the VR product; and moving the NED product to a positioning camera station by the station switching mechanism to detect the offset in the azimuth angle and the coordinate position offset of the VR product.

[0015] In an embodiment of the present application, when the NED product is an AR light machine, after the NED product is moved in the Y-axis direction to the detection station end by the feeding mechanism, the method further comprises: moving the AR light machine in the X-axis direction perpendicular to the Y-axis direction to the projector assembly by the station switching mechanism; and the projector assembly comprises two groups of projection sensors with optical axes in the X-axis direction and the Y-axis direction, respectively, for detecting the offset of the AR light machine in the pitch angle and the roll angle, the coordinate position offset, and the relative height.

[0016] As can be seen from the above, the above-mentioned embodiments of the present application can have at least the following beneficial effects:

[0017] (1) The NED product detection equipment of the present application fixes the NED product by setting a multi-axis platform, switches the NED product between the geometric alignment station end and the detection station end by the feeding mechanism, and switches the NED product between the various stations of the geometric alignment station end by the station switching mechanism. The geometric alignment station end detects the attitude and position of the NED product in the geometric space, and the multi-axis platform can adjust the NED product to the ideal position according to the detection result, and then the NED product is detected in the detection station end to detect the optical performance of the NED product. In this way, the consistency of the NED product is automatically detected, which can effectively improve the detection efficiency and accuracy of the NED product.

[0018] (2) The NED product detection equipment of the present application integrates the autocollimator station, the laser line scanning profile station, and the positioning camera station at the geometric alignment station end, and integrates the main inspection camera station and the projector assembly at the detection station end. In combination with the multi-axis platform that can adjust the attitude and position of the NED product, and the feeding mechanism and the station switching mechanism that can move along the X-axis direction and the Y-axis direction, respectively, the accurate alignment and detection of various NED products including AR products, VR products, and AR light machines can be met, which has high applicability and is conducive to the standardization of the instrument. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application and illustrate the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 A structural schematic view of one side of the geometric alignment station end of the NED product detection equipment provided in an embodiment of the present application;

[0021] Figure 2 A structural schematic view of one side of the detection station end of the NED product detection equipment provided in an embodiment of the present application;

[0022] Figure 3A flow chart of a NED product detection method provided by an embodiment of the present application.

[0023] Explanation of reference signs

[0024] 1, detection machine; 2, fixed crossbeam; 3, geometric alignment station end; 31, laser line scanning profile station; 32, positioning camera station; 33, autocollimator station; 4, detection station end; 41, main inspection camera station; 42, projector assembly; 5, multi-axis platform; 6, feeding mechanism; 7, station switching mechanism;

[0025] S1 to S4: steps of the NED product detection method. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described below with reference to the accompanying drawings and in conjunction with the embodiments.

[0027] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and should all be within the protection scope of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are applicable to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged as appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0029] It should also be noted that the division of the plurality of embodiments in the present application is only for the convenience of description, and should not constitute a special limitation. The features in the various embodiments can be combined with each other without contradiction, and can be mutually referred to.

[0030] As Figure 1 and Figure 2As shown, the first embodiment of the present application proposes a NED product detection device, for example, comprising: a detection machine 1, a fixed crossbeam 2 arranged on the detection machine, a geometric alignment station end 3 and a detection station end 4 arranged on both sides of the fixed crossbeam 2 respectively, a multi-axis platform 5, a feeding mechanism 6 and a station switching mechanism 7.

[0031] The geometric alignment station end 3 is used to detect the posture and position of the NED product in the geometric space, and the detection station end 4 is used to detect the optical performance of the NED product. The multi-axis platform 5 is used to fix the NED product and adjust the posture and position of the NED product according to the detection result of the geometric alignment station end 3. The feeding mechanism 6 is connected to the multi-axis platform 5 and used to drive the NED product to move in the Y-axis direction, so as to switch between the geometric alignment station end 3 and the detection station end 4. The station switching mechanism 7 is connected to the feeding mechanism 6 and used to drive the NED product to move in the X-axis direction perpendicular to the Y-axis direction, so as to switch between the various stations of the geometric alignment station end 3.

[0032] In this way, the consistency of the NED product is realized. Compared with the manual detection mode, the detection efficiency and accuracy of the NED product can be effectively improved.

[0033] Specifically, the NED product mentioned herein includes, for example, AR products, VR products and AR light machine products. In an embodiment, the NED product is an AR product, and the geometric alignment station end 3 includes, for example, a laser line scanning contour station 31 and a positioning camera station 32. The laser line scanning contour station 31 is used to detect the relative height of the AR product and the offset in the pitch angle and roll angle, and the positioning camera station 32 is used to detect the offset in the azimuth angle and the coordinate position offset of the AR product. The detection steps of the NED product detection device for a monocular AR product are as follows:

[0034] 1) The monocular AR product is installed on the multi-axis platform (such as a six-axis platform), and is moved to the geometric alignment station end 3 along the Y-axis direction by the feeding mechanism 6, and the product is not turned on;

[0035] 2) The monocular AR product is moved to the laser line scanning contour station 31 along the X-axis direction by the station switching mechanism 7, and the offset θX of the product optical axis in the roll angle and the offset θY in the pitch angle (i.e. the inclination angle of the product along the X-axis and Y-axis directions) can be measured, as well as the relative height Z between the product and the detection lens;

[0036] 3) The values of θX and θY are fed back to the multi-axis platform 5, and θX and θY are adjusted so that the inclination angle of the product is 0, and the relative height data Z is obtained, so that when the product moves to the detection station end 4, the main detection camera is quickly adjusted to the eye point height (the best observation height);

[0037] 4) The monocular AR product is moved to the positioning camera station 32 by the station switching mechanism 7, the coordinate position offsets x and y of the product optical axis in the X-axis and Y-axis directions and the offset θZ in the azimuth angle can be measured, and the offset values x and y in the X-axis and Y-axis directions and the θZ value are fed back to the multi-axis platform 5 to adjust x, y and θZ to 0;

[0038] 5) The monocular AR product is moved to the detection station end 4 along the Y-axis direction by the feeding mechanism 6, and then moved to the main detection camera station 41 along the X-axis direction by the station switching mechanism 7, the product is turned on, and the optical performance test is performed to measure the FOV, brightness, resolution, contrast and other optical performance parameters;

[0039] 6) The product is powered off, and the monocular AR product is moved to the unloading station by the feeding mechanism 6 for unloading, and the detection is completed.

[0040] In an embodiment, the NED product is a VR product, and the geometric alignment station end 3 includes, for example, a collimator station 33, a laser line scanning profile station 31 and a positioning camera station 32. The collimator station 33 is used to detect the offsets of the VR product in the pitch angle and roll angle. The laser line scanning profile station 31 is used to detect the relative height of the VR product. The positioning camera station 32 is used to detect the offset in the azimuth angle and the coordinate position offset of the VR product.

[0041] In this way, for a VR product with a small optical lens, the geometric alignment station end 3 integrated with the collimator station 33 can accurately measure the inclination angles of the product optical axes θX and θY. The detection steps of the NED product detection device for a monocular VR product are as follows:

[0042] 1) The monocular VR product is installed on a multi-axis platform (such as a six-axis platform), and is moved to the geometric alignment station end 3 along the Y-axis direction by the feeding mechanism 6, and the product is not turned on;

[0043] 2) The monocular VR product is moved to the collimator station 33 along the X-axis direction by the station switching mechanism 7, the offsets θX in the roll angle and θY in the pitch angle of the product optical axis (i.e. the inclination angles of the product along the X-axis and Y-axis directions) can be measured, and the values of θX and θY are fed back to the multi-axis platform 5 to adjust θX and θY so that the inclination angles of the product θX and θY are 0;

[0044] 3) The monocular VR product is moved to the laser line scanning profile station 31 along the X-axis direction by the station switching mechanism 7, the relative height Z between the product and the detection lens can be measured, so that when the product is moved to the detection station end 4, the main detection camera can be quickly adjusted to the eye point height (the best observation height);

[0045] 4) The monocular VR product is moved to the positioning camera station 32 along the X-axis direction by the station switching mechanism 7, the coordinate position offsets x, y of the product optical axis in the X-axis and Y-axis directions and the offset θZ in the azimuth angle can be measured, and the offset values x, y and θZ in the X-axis and Y-axis directions are fed back to the multi-axis platform 5 to adjust x, y and θZ to 0;

[0046] 5) The monocular VR product is moved to the detection station end 4 along the Y-axis direction by the feeding mechanism 6, and then moved to the main detection camera station 41 along the X-axis direction by the station switching mechanism 7, the product is lighted, and the optical performance test is performed to measure the optical performance parameters such as FOV, brightness, resolution and contrast;

[0047] 6) The product is powered off, and the monocular VR product is moved to the unloading position by the feeding mechanism 6 for unloading, and the detection is completed.

[0048] It is worth mentioning that the NED product detection equipment proposed in the embodiment is also applicable to the detection of binocular AR products and binocular VR products, and the above steps 1-6 can be repeated, and based on this, the binocular test items such as brightness difference and field difference of the left and right eyes of the NED equipment can be measured at the same time.

[0049] In one embodiment, the NED product is an AR light machine (without a light waveguide sheet), and the detection station end 4 thereof further comprises, for example, a projector assembly 42. The projector assembly 42 comprises two groups of projection sensors with optical axes located in the X-axis direction and the Y-axis direction respectively, for detecting the offsets of the AR light machine in the pitch angle and roll angle, the coordinate position offsets and the relative height, and the specific detection steps are as follows:

[0050] 1) The AR light machine product is installed on a multi-axis platform (such as a six-axis platform), and is moved to the detection station end 4 along the Y-axis direction by the feeding mechanism 6, and the product is not lighted;

[0051] 2) The AR light machine product is moved to the projector assembly 42 along the X-axis direction by the station switching mechanism 7, the offset θX of the AR light machine in the roll angle and the offset θY in the pitch angle (i.e. the inclination angle of the product in the X-axis and Y-axis directions) can be measured, as well as the coordinate position offsets x, y of the product center relative to the center of the detection lens in the X-axis and Y-axis directions, and the relative height Z between the product and the detection lens;

[0052] 3) The values of θX, θY, x and y are fed back to the multi-axis platform 5 to adjust θX, θY, x and y so that the θX and θY inclination angles of the product and the x and y coordinates are 0, and the relative height data Z is obtained so that when the product is moved to the detection station end 4, the main detection camera is quickly adjusted to the eye point height (the best observation height);

[0053] 4) The product is powered off, and the VR light machine product is moved to the unloading position by the feeding mechanism 6 to be unloaded, and the detection is completed.

[0054] In summary, the NED product detection device provided by the embodiments of the present application fixes the NED product by setting a multi-axis platform, switches the NED product between the geometric alignment work station end and the detection work station end by the feeding mechanism, switches the NED product between each work station of the geometric alignment work station end by the work station switching mechanism, detects the posture and position of the NED product in the geometric space by the geometric alignment work station end, adjusts the NED product to the ideal position according to the detection result by the multi-axis platform, and then detects the optical performance of the NED product by the detection work station end, so as to realize the automatic detection of the consistency of the NED product, and effectively improve the detection efficiency and accuracy of the NED product. Moreover, by integrating the autocollimator work station, the laser line scanning contour work station and the positioning camera work station at the geometric alignment work station end, and integrating the main detection camera work station and the projector assembly at the detection work station end, and cooperating with the multi-axis platform capable of adjusting the posture and position of the NED product, and the feeding mechanism and the work station switching mechanism capable of moving along the X-axis direction and the Y-axis direction respectively, the accurate alignment and detection of various NED products including AR products, VR products and AR light machines can be met, the applicability is high, and the standardization popularization of the instrument is facilitated.

[0055] In addition, the second embodiment of the present application also provides a NED product detection method, for example, comprising the following steps: S1, mounting the NED product on the multi-axis platform, moving the NED product in the Y-axis direction by the feeding mechanism, and reaching the geometric alignment work station end; S2, moving the NED product in the X-axis direction perpendicular to the Y-axis direction by the work station switching mechanism, switching between each work station of the geometric alignment work station end, and detecting the posture and position of the NED product in the geometric space; S3, feeding back the detection result of the geometric alignment work station end to the multi-axis platform, adjusting the posture and position of the NED product according to the detection result; and S4, moving the NED product in the Y-axis direction by the feeding mechanism, reaching the detection work station end, and detecting the optical performance of the NED product.

[0056] In one embodiment, when the NED product is an AR product, the step of moving the NED product in the X-axis direction perpendicular to the Y-axis direction by the work station switching mechanism, switching between each work station of the geometric alignment work station end, and detecting the posture and position of the NED product in the geometric space comprises: moving the NED product to the laser line scanning contour work station by the work station switching mechanism, for detecting the relative height of the AR product and the offset in the pitch angle and roll angle; and moving the NED product to the positioning camera work station by the work station switching mechanism, for detecting the offset in the azimuth angle of the AR product and the coordinate position offset.

[0057] In one embodiment, when the NED product is a VR product, the NED product is moved by the station switching mechanism in the X-axis direction perpendicular to the Y-axis direction to switch between the stations at the geometric alignment station end, and the posture and position of the NED product in the geometric space are detected, including: moving the NED product to the autocollimator station by the station switching mechanism to detect the offset of the VR product in the pitch angle and roll angle; moving the NED product to the laser line scanning profile station by the station switching mechanism to detect the relative height of the VR product; and moving the NED product to the positioning camera station by the station switching mechanism to detect the offset of the VR product in the azimuth angle and the coordinate position offset.

[0058] In one embodiment, when the NED product is an AR light machine, the NED product is moved by the feeding mechanism in the Y-axis direction to the detection station end, and then the AR light machine is moved by the station switching mechanism in the X-axis direction perpendicular to the Y-axis direction to the projector assembly; the projector assembly includes two groups of projection sensors with optical axes in the X-axis direction and the Y-axis direction, respectively, to detect the offset of the AR light machine in the pitch angle and roll angle, the coordinate position offset, and the relative height.

[0059] It is worth mentioning that the NED product detection method provided in the second embodiment of the present application is applicable to the NED product detection device provided in the first embodiment, and the structure and functions of the NED product detection device can refer to the content described in the first embodiment, which will not be described in detail here. The beneficial effects of the NED product detection method provided in the second embodiment are the same as those of the NED product detection device provided in the first embodiment.

[0060] The above description is only exemplary embodiments of the present disclosure, and cannot limit the scope of the present disclosure. Any equivalent changes and modifications made in accordance with the teachings of the present disclosure are still within the scope of the present disclosure. Those skilled in the art will easily think of embodiments of the present disclosure after considering the specification and practicing the disclosure herein. The present application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or conventional techniques in the art that are not described in the present disclosure. The specification and examples are only considered as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

[0061] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, any combination of the technical features is considered to be within the scope of the present application.

[0062] It should be understood by those skilled in the art that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A testing device for NED products, characterized in that, include: Testing equipment; A fixed crossbeam is installed on the testing machine. The geometric alignment station and the detection station are respectively set on both sides of the fixed crossbeam. The geometric alignment station is used to detect the attitude and position of the NED product in geometric space, and the detection station is used to detect the optical performance of the NED product. A multi-axis platform is used to fix the NED product and adjust the attitude and position of the NED product according to the detection results of the geometric alignment station. The feeding mechanism, connected to the multi-axis platform, is used to drive the NED product to move in the Y-axis direction, so as to switch between the geometric alignment station and the detection station. A station switching mechanism, connected to the feeding mechanism, is used to drive the NED product to move in the X-axis direction perpendicular to the Y-axis direction, so as to switch between various stations at the geometric alignment station end. When the NED product is a VR product, the geometric alignment station includes: The autocollimator station is used to detect the VR product's offset in pitch and roll angles. The positioning camera station is used to detect the azimuth and coordinate position offset of the VR product.

2. The NED product testing equipment according to claim 1, characterized in that, When the NED product is an AR product, the geometric alignment station includes: A laser line scanning contour station is used to detect the relative height of the AR product and its offset in pitch and roll angles; The positioning camera station is used to detect the azimuth angle offset and coordinate position offset of the AR product.

3. The NED product testing equipment according to claim 1, characterized in that, The NED product is a VR product, and the geometric alignment station includes: A laser line scanning contour station is used to detect the relative height of the VR product.

4. The NED product testing equipment according to any one of claims 1-3, characterized in that, The detection station includes: The main camera inspection station is used to inspect the optical performance of the NED product, including: FOV, luminance, color saturation, resolution, and contrast.

5. The NED product testing equipment according to claim 4, characterized in that, When the NED product is an AR optical engine, the detection station also includes: The projector assembly includes two sets of projection sensors with optical axes located on the X-axis and Y-axis directions, respectively, for detecting the offset of the AR optical engine in the pitch and roll angles, coordinate position offset, and relative height.

6. A method for testing NED products, applicable to the NED product testing equipment described in any one of claims 1-5, characterized in that, include: The NED product is installed on a multi-axis platform, and the NED product is moved in the Y-axis direction by the feeding mechanism to reach the geometric alignment station end. The NED product is moved along the X-axis direction, which is perpendicular to the Y-axis, by a station switching mechanism to switch between various stations at the geometric alignment station end, and to detect the posture and position of the NED product in geometric space. The detection results of the geometric alignment station are fed back to the multi-axis platform to adjust the attitude and position of the NED product according to the detection results; The feeding mechanism drives the NED product to move along the Y-axis and reach the testing station to test the optical performance of the NED product.

7. The NED product testing method according to claim 6, characterized in that, When the NED product is an AR product, the step of moving the NED product along the X-axis direction perpendicular to the Y-axis direction via the workstation switching mechanism to switch between various workstations at the geometric alignment workstation end, and detecting the attitude and position of the NED product in geometric space, includes: The NED product is moved to the laser line scanning contour station by the station switching mechanism to detect the relative height of the AR product and its offset in pitch and roll angles. The NED product is moved to the positioning camera station by the station switching mechanism to detect the azimuth angle offset and coordinate position offset of the AR product.

8. The NED product testing method according to claim 6, characterized in that, When the NED product is a VR product, the step of moving the NED product along the X-axis direction perpendicular to the Y-axis direction via the workstation switching mechanism to switch between various workstations at the geometric alignment workstation end, and detecting the posture and position of the NED product in geometric space, includes: The NED product is moved to the autocollimator station by the station switching mechanism to detect the offset of the VR product in pitch and roll angles. The NED product is moved to the laser line scanning contour station by the station switching mechanism to detect the relative height of the VR product; The NED product is moved to the positioning camera station by the station switching mechanism to detect the VR product's azimuth and coordinate position offset.

9. The NED product testing method according to claim 6, characterized in that, When the NED product is an AR optical engine, after the feeding mechanism moves the NED product in the Y-axis direction and it reaches the detection station, the process further includes: The AR optical engine is moved along the X-axis direction, which is perpendicular to the Y-axis, by the workstation switching mechanism, and reaches the projector assembly. The projector assembly includes two sets of projection sensors with optical axes located on the X-axis and Y-axis directions, respectively, for detecting the AR optical engine's offset in pitch and roll angles, coordinate position offset, and relative height.

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