Device and method for adjusting and testing optical modules in binocular head-mounted devices

Abstract

The present invention provides an assembly and adjustment test device and method for an optical module in a binocular head-mounted device, the device comprising a first camera and a second camera simulating binoculars, a camera positioning mechanism for calibrating the positions of the first camera and the second camera, a first adjustment mechanism and a second adjustment mechanism for respectively adjusting the first optical module and the second optical module, and a bracket fixing device for fixing a binocular bracket. The present invention uses two cameras simulating human eyes to respectively collect images of test examples displayed by display devices in two optical modules, and obtains the rotation angle and tilt of the two test example images relative to the test example at the target position. The adjustment mechanism adjusts the angle of the optical module according to the obtained rotation angle and tilt to compensate for the adverse effects of the structural tolerance and assembly tolerance of the optical module on the imaging quality. The test is completed while assembling, thereby improving the product yield and the efficiency of finished product assembly and testing, ensuring the consistency of the product, and meeting the needs of mass production.

Description

Technical Field

[0001] The present invention relates to an assembly and adjustment testing technology for an optical module, and in particular to an assembly and adjustment testing device and method for an optical module in a binocular head-mounted device. Background Art

[0002] Modern computer technology, display technology, sensor technology and other scientific and technological advances have promoted the development of AR (Augmented Reality) and VR (Virtual Reality) experience systems. VR scenes create a virtual information environment in a multi-dimensional information space, which enables users to have an immersive sense of being in the scene and have the ability to interact with the environment perfectly; AR scenes apply virtual information to the real world, and the real environment and the virtual environment are superimposed on the same screen or space in real time and exist simultaneously.

[0003] AR and VR head-mounted devices include display devices that project images directly into the human eye. The distance between the display device and the human eye is generally less than ten centimeters. Through optical processing of a specific optical module, the head-mounted device can project the image clearly onto the retina of the human eye, presenting a virtual enlarged image in front of the user, which can be used in virtual reality, augmented reality or mixed reality application scenarios.

[0004] Binocular head-mounted devices should be measured for pupil distance before use. When the user's eye position or refractive system does not work well with the optical module system of the binocular head-mounted device, the optical module needs to be adjusted so that the user can see a clear image. The pupil distance measurement device used in existing binocular head-mounted devices is achieved by physical adjustment and software adjustment, mainly by adjusting the distance between the display device and the optical lens of the optical module, or by adjusting the display area to meet the needs of different pupil distances. Regardless of the adjustment method, an adjustment reference position is required, that is, the two optical modules are installed on the binocular bracket according to a certain human eye pupil distance and refractive power, and then personalized adjustments are made according to different user needs.

[0005] The adjustment of the optical module reference position in existing binocular head-mounted devices is mainly achieved by controlling the processing accuracy of the binocular bracket to ensure its structural accuracy, reducing the position error introduced during the assembly process through assembly jigs or manual processes, and finally eliminating unqualified products with large binocular alignment deviations through imaging detection, thereby achieving control of the imaging quality of the binocular optical module.

[0006] The main factors that usually lead to deviations in optical mold assembly and adjustment are the structural tolerances of parts and the assembly tolerances of the assembly process, and both errors are difficult to eliminate. In addition, for optical components such as lenses, aberrations are inevitable, and the existing assembly and testing based on mechanical alignment cannot overcome the impact of aberration factors on the final imaging effect. Therefore, the existing optical component assembly and adjustment testing processes and processes often lead to low product yields, low efficiency, poor product stability and consistency, and soaring costs. The current methods are not suitable for large-scale mass production.

[0007] There are two main ways to test the reference position of the optical module in the existing binocular head-mounted devices. One is the subjective test of the human eye, that is, let the tester with the same pupil distance and refractive power wear the device to perceive whether it meets the requirements of clarity, comfort and so on. This method is highly subjective, low in precision and poor in consistency. The other method is to replace the human eye with a standardized industrial camera to detect the binocular alignment accuracy. This method requires an initial position calibration of the industrial camera for binocular detection, mainly through the calibration of optical parameters other than the industrial camera. That is, the industrial camera generally requires the use of calibration test boards, fill lights and other tools. During the test, it is necessary to ensure that the calibration test board is evenly exposed to control the error of the feature points of the captured image. This method has a cumbersome calibration process and strictly relies on external optical conditions and calibration tools. The calibration error is difficult to quantify and control, and the efficiency is low, and the product consistency is poor. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides an optical module assembly and testing device in a binocular head mounted device, which is used to fix a first optical module (01) and a second optical module (02) on a binocular support (03) according to reference position parameters, and comprises:

[0009] The first camera (1) and the second camera (2) are used to simulate the structure of a human eye with reference position parameters;

[0010] The first adjustment mechanism (3) and the second adjustment mechanism (4) are used to adjust the rotational position of the first optical module (01) and the second optical module (02), wherein the rotational position includes a rotational angle and a position offset relative to a target position.

[0011] The processor (6) is used for analyzing the images captured by the first camera (1) and the second camera (2);

[0012] The first camera (1) and the second camera (2) are respectively used to capture a first test image of the test pattern formed by the first optical module (01) and a second test image of the test pattern formed by the second optical module (02); the processor (6) is used to obtain a first rotation angle α of the first test image relative to the reference image in the coordinate system. Land a second rotation angle α of the second test image relative to the reference image in the coordinate system. R , wherein the first test image and the second test image and the reference image are mapped to the same coordinate system; when the first optical module (01) and the second optical module (02) are respectively in the same straight line with the optical axes of the first camera (1) and the second camera (2) simulating the human eye structure with reference position parameters, the first test image and the second test image are mapped to the same coordinate system and substantially overlap, and the test images at this time serve as the reference images of the test example; the first adjustment mechanism (3) and the second adjustment mechanism (4) are respectively used to adjust the first rotation angle α according to the obtained first rotation angle α L The second rotation angle α R , respectively adjusting the rotation angles of the first optical module (01) and the second optical module (02), and

[0013] The first camera (1) and the second camera (2) are respectively used to capture a first test image formed by the first optical module (01) of the test example at the current position and a second test image formed by the second optical module (02); the processor (6) is used to respectively obtain a first position offset (x) of the first test image and the second test image relative to the reference image in the coordinate system. L ,y L ) and the second position offset (x R ,y R ), wherein the first test image, the second test image and the reference image are mapped to the same coordinate system; the first adjustment mechanism (3) and the second adjustment mechanism (4) are respectively used to adjust the first position offset (x) according to the obtained first position offset L ,y L ) and the second position offset (x R ,y R ), respectively adjusting the position offset of the first optical module (01) and the second optical module (02).

[0014] Furthermore, the reference position parameters include a reference pupil distance L1 and a reference viewing angle β, and the target position refers to a position where the first optical module (01) and the second optical module (02) are respectively in the same straight line with the optical axes of the first camera (1) and the second camera (2) simulating the human eye structure having the reference position parameters.

[0015] Furthermore, the assembly and adjustment testing device also includes a camera positioning mechanism, which is used to calibrate the positions of the first camera (1) and the second camera (2) according to the reference position parameters.

[0016] Furthermore, the camera positioning mechanism includes a binocular eye axis simulation block for simulating the reference position parameter human eye structure.

[0017] Furthermore, the binocular optical axis simulation block (7) is provided with a first optical axis reference hole (71) and a second optical axis reference hole (72), the distance between the central axes of the first optical axis reference hole (71) and the second optical axis reference hole (72) is a reference pupil distance L1, the reference pupil distance L1 is 55 mm-75 mm, and the angle between the central axes of the first optical axis reference hole (71) and the second optical axis reference hole (72) is equal to the reference viewing angle β.

[0018] Furthermore, the camera positioning mechanism also includes an illumination mechanism for illuminating the edges of the first optical axis reference hole (71) and the second optical axis reference hole (72).

[0019] Preferably, the lighting mechanism includes at least one of a ring light or a panel light;

[0020] The ring lights are respectively arranged at the front entrances of the first optical axis reference hole (71) and the second optical axis reference hole (72), and the inner diameter of the ring lights is larger than the inner diameters of the first optical axis reference hole (71) and the second optical axis reference hole (72);

[0021] The panel lights are respectively arranged at the rear exits of the first optical axis reference hole (71) and the second optical axis reference hole (72), and the outer diameter of the panel lights is larger than the inner diameters of the first optical axis reference hole (71) and the second optical axis reference hole (72).

[0022] Furthermore, it also includes a bracket fixing device (5) for fixing the binocular bracket (03).

[0023] Furthermore, it also includes a processor (6), and a first camera (1) and a second camera (2) connected to the processor, and the first optical module (01) and the second optical module (02) are respectively electrically connected to the processor (6).

[0024] Furthermore, the first adjustment mechanism (3) and the second adjustment mechanism (4) are electrically connected to the processor (6).

[0025] The present invention also provides a method for assembling and adjusting an optical module in a binocular head-mounted device, which is operated by using the apparatus for assembling and adjusting an optical module in a binocular head-mounted device, and comprises the following steps:

[0026] Step S20, collecting a first test image of the test example formed by the first optical module (01) and a second test image of the test example formed by the second optical module (02), mapping the collected first test image, the second test image and the reference image to the same coordinate system, and obtaining a first rotation angle α of the first test image relative to the reference image in the coordinate systemL and a second rotation angle α of the second test image relative to the reference image in the coordinate system. R According to the first rotation angle α obtained L The second rotation angle α R respectively adjusting the rotation angles of the first optical module (01) and the second optical module (02);

[0027] Step S30, collecting a first test image of the test example at the current position imaged by the first optical module (01) and a second test image of the test example imaged by the second optical module (02), mapping the collected first test image, the second test image and the reference image to the same coordinate system, and respectively obtaining a first position offset (x) of the first test image and the second test image relative to the reference image in the coordinate system. L ,y L ) and the second position offset (x R ,y R ); According to the first position offset (x L ,y L ) and the second position offset (x R ,y R ) respectively adjusting the position offset of the first optical module (01) and the second optical module (02);

[0028] Step S50: fixing the first optical module (01) and the second optical module (02) to a binocular support (03).

[0029] Preferably, the test legend is a preset legend.

[0030] Furthermore, the preset legend is a graphic pattern formed by several rows or columns of solid circles, or squares formed by line pairs, or horizontal and vertical lines, or a combination of solid circles and lines on squares, or an image pattern formed by a chessboard or a QR code (the QR code includes a rectangular coordinate QR code and a polar coordinate QR code).

[0031] Furthermore, in step S20, the step of obtaining the first rotation angle and the second rotation angle includes:

[0032] A coordinate system is established with the center point of the test diagram as the origin, the length direction of the display area of ​​the display device of the optical module as the X-axis direction, and the width direction of the display device as the Y-axis direction, and the first test image, the second test image and the reference image are mapped to the same coordinate system;

[0033] One or more feature points are selected on the straight line passing through the origin in the reference image, and the line connecting any feature point and the origin in the reference image is used as the reference line. The feature point image on the reference line corresponding to the first test image or the second test image is fitted into a straight line using the least squares method, and the average of the angles between all fitting lines and the corresponding reference line is used as the first rotation angle α L Or the second rotation angle α R .

[0034] Further, in step S30, the first position offset (x L ,y L ) and the second position offset (x R ,y R ) steps include:

[0035] Selecting feature points of the test example, and establishing a coordinate system with the center point of the test example as the origin, the length direction of the display area of ​​the display device of the optical module as the X-axis direction, and the width direction of the display device as the Y-axis direction, and mapping the first test image, the second test image and the reference image to the same coordinate;

[0036] The feature point of the reference image is used as the new origin, and the original X-axis and Y-axis directions are used as the new X-axis and Y-axis directions to re-establish the coordinate system, obtain the position offset of the same feature point of the first test image or the second test image relative to the new origin on the X-axis and Y-axis, and take the average of the position offsets of all feature points obtained as the first position offset (x L ,y L ) or the second position offset (x R ,y R ).

[0037] Furthermore, a step S40 is included between step S30 and step S50, and step S40 includes:

[0038] Verify whether the rotation angle difference and position offset difference between the first optical module (01) and the second optical module (02) are within a predetermined range at the current position. If so, execute step S50; if not, repeat steps S20 to S40.

[0039] Preferably, the method further comprises step S10 of calibrating the positions of the first camera (1) and the second camera (2) by means of a camera positioning mechanism.

[0040] Further preferably, in step S10, the camera positioning mechanism calibrates the positions of the first camera (1) and the second camera (2) by respectively photographing the image of the first optical axis reference hole (71) and the second optical axis reference hole (72) of the binocular optical axis simulation block (7) with the first camera (1) and the second camera (2), and adjusts the positions of the first camera (1) and the second camera (2) until the image of the first optical axis reference hole (71) and the image of the second optical axis reference hole (72) are both concentric circles.

[0041] By adopting the above scheme, the present invention has the following technical effects: the present invention uses dual cameras to simulate the imaging effect of both eyes, and the optical parameters of the cameras simulate the optical parameters of the reference position of the human eye to ensure that the imaging effect is consistent with the imaging of the human eye, so that the imaging of the optical module meets the comfort of the human eye; a binocular axis simulation block is made by using the obtained reference position parameters to calibrate the position of the dual cameras, which is suitable for batch assembly occasions; the first camera and the second camera are used to respectively collect the images of the test example displayed by the display device in the first optical module and the second optical module to obtain the first test image and the second test image, and the rotation angle and the tilt amount of the first test image and the second test image relative to the test example of the reference position are obtained, and the first adjustment mechanism and the second adjustment mechanism are used to adjust the angle of the first optical module and the second optical module according to the obtained rotation angle and tilt amount, respectively, to compensate for the structural tolerance and assembly tolerance of other optical components of the optical module. The adverse effects on the imaging quality caused by the adverse effects on the imaging quality are compensated, and the better imaging quality is ensured. The test of the optical module is completed while assembling, the product yield and the finished product assembly test efficiency are improved, and the consistency of the binocular optical module product is ensured; the assembly and adjustment test device of the present invention is simple to operate, stable and reliable, and has good consistency, which meets the needs of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1A This is a schematic diagram of the production principle of binocular axis simulation block;

[0043] Figure 1B It is a schematic diagram of the structure of the binocular axis simulation block;

[0044] Figure 2 It is a structural schematic diagram of the camera positioning mechanism;

[0045] Figure 3 is a front view of the camera positioning mechanism;

[0046] Figure 4 is an example of an image of a binocular axis simulation block captured by a camera;

[0047] Figure 5 It is a structural schematic diagram of the adjustment device of the present invention;

[0048] Figure 6 This is a test example 1 for testing the imaging of the optical module of the present invention;

[0049] Figure 7 is a schematic diagram of the mapping relationship between the test example 1 at the reference position and the images of the test example 1 of the first optical module and the second optical module in the same coordinate axis;

[0050] Figure 8 This is a test example 2 for testing the imaging of the optical module of the present invention;

[0051] Fig. 9 is a schematic diagram of the mapping relationship between the test example 2 at the reference position and the images of the test example 2 of the first optical module and the second optical module in the same coordinate axis;

[0052] Fig.10 This is a test diagram 3 for testing the imaging of the optical module of the present invention;

[0053] Fig.11 This is the fourth test diagram for testing the imaging of the optical module of the present invention.

[0054] The reference numerals in the figure represent:

[0055] 01-first optical module, 011-first optical component, 012-first display device;

[0056] 02-second optical module, 021-second optical component, 022-second display device;

[0057] 03-binocular bracket; 06-left eye; 07-right eye; 08-projected virtual image;

[0058] 1-first camera; 2-second camera;

[0059] 3-first adjustment mechanism; 4-second adjustment mechanism; 5-bracket fixing device; 6-processor;

[0060] 7-binocular optical axis simulation block, 71-first optical axis reference hole, 72-second optical axis reference hole;

[0061] 8-Ring light; 9-Panel light;

[0062] a- camera optical axis center, b- reference hole entrance profile, c- reference hole exit profile, d- entrance profile circle center, e- exit profile circle center. DETAILED DESCRIPTION

[0063] Aiming at the problem that the existing assembly and testing based on mechanical alignment cannot overcome the influence of aberration factors on the final imaging effect, the present invention provides an assembly and adjustment test device and method for an optical module in a binocular head-mounted device.

[0064] Two cameras are used to simulate both eyes, and a binocular eye axis simulation block is made by using the obtained reference position parameters to calibrate the positions of the two cameras;

[0065] The camera positioning mechanism includes a binocular optical axis simulation block, which is provided with a first optical axis reference hole and a second optical axis reference hole to simulate the pupil distance and the viewing angle when the two eyes are looking straight ahead, and the two cameras calibrate the camera reference position by respectively shooting images of the first optical axis reference hole and the second optical axis reference hole;

[0066] After removing the binocular eye axis simulation block, placing the first optical module and the second optical module at the position of the binocular eye axis simulation block, and adjusting the optical axis of the optical module to coincide with the corresponding camera optical axis;

[0067] The two cameras respectively capture the images of the test diagrams displayed by the corresponding display devices in the cameras, and map the captured images of the test diagrams and the reference images to the same coordinate system, and obtain the inclination and rotation angle of the images of the two test diagrams relative to the corresponding reference positions. According to the obtained inclination and rotation angle, the corresponding optical modules are adjusted through their respective adjustment mechanisms, thereby ensuring that the rotation angle and inclination deviations between the test diagram images of the corresponding optical modules captured by the two cameras meet the preset ranges.

[0068] It should be noted that in the following embodiments of the present invention, the predetermined position does not refer to the position at which the optical module achieves optimal performance or the imaging quality of the optical module is optimal. The target position refers to the position at which the performance or imaging quality of the optical module can achieve the relatively optimal position among all the positions involved.

[0069] The test pattern is a pattern specially designed to facilitate observation and calculation of the rotation angle and tilt of the image formed by the first optical module and the second optical module in the binocular head-mounted device. The test pattern of the present invention is preferably a test pattern consisting of several rows and columns of solid circles, or a test pattern consisting of multiple concentric circles and radial lines symmetrically drawn from the center of the circle; or a test pattern consisting of multiple rows and columns of checkerboards or characteristic lines. Of course, the method and device of the present invention are not limited to the above test patterns, and may also be other suitable test patterns.

[0070] The reference image of the test example means that when the first optical module and the second optical module are in the target position (that is, they are respectively in the same straight line with the optical axes of the first camera and the second camera that simulate the human eye structure with reference position parameters), the first test image of the test example captured by the first camera and imaged by the first optical module and the second test image of the test example captured by the second camera and imaged by the second optical module are mapped to the same coordinate system and basically overlap. At this time, the test example image can be used as the reference image of the test example.

[0071] The following describes in detail the assembly and adjustment testing device and method for the binocular head-mounted device of the present invention with reference to the accompanying drawings and examples.

[0072] Device

[0073] For AR and VR binocular head-mounted devices, different users have different pupil distances. Children have a small pupil distance, while adults have a large pupil distance. Generally, the pupil distance of adult males is between 60mm-73mm, and that of females is between 53mm-68mm. Currently, binocular head-mounted devices generally have a pupil distance adjustment function (the specific pupil distance adjustment structure and method are not the focus of this application and are not described here). Any binocular head-mounted device has a reference position, and the pupil distance adjustment is performed on the basis of the reference position. According to statistical laws, the present invention takes the average pupil distance of adults of 63.5mm as the reference pupil distance. Binocular head-mounted products must meet a certain binocular focusing distance, that is, the optical axis of the binocular module must ensure a certain convergence angle. The present invention takes the case where the image converges 2 meters in front of the human eye when the binocular displays the image as an example. At this time, the angle between the two optical axes is the reference viewing angle, and the reference viewing angle is 1.8°. The present invention performs adjustment tests on the optical module in the binocular head-mounted device based on the above-mentioned reference position.

[0074] like Figure 5 As shown, the optical module assembly and adjustment test device in the binocular head mounted device of the present invention comprises a first camera 1 and a second camera 2 simulating binoculars, a camera positioning mechanism for calibrating the positions of the first camera 1 and the second camera 2, a first adjustment mechanism 3 and a second adjustment mechanism 4 for respectively adjusting the first optical module 01 and the second optical module 02, and a bracket fixing device 5 for fixing the binocular bracket 03, wherein:

[0075] The first optical module 01 includes a first optical component 011 and a first display device 012 ; the second optical module 02 includes a second optical component 021 and a second display device 022 .

[0076] The first camera 1 and the second camera 2 are used to simulate human eyes with reference position parameters, and the pupil distance and the viewing angle are calibrated by using the camera positioning mechanism. The present invention simulates the optical axis of the imaging light path when the two eyes are facing forward by making a binocular eye axis simulation block 7. Figure 1A To make a schematic diagram of the principle of binocular axis simulation block 7, Figure 1B FIG. 7 is a schematic diagram of the structure of the binocular axis simulation block 7. Figure 1B As shown, the binocular eye axis simulation block 7 includes a first optical axis reference hole 71 and a second optical axis reference hole 72, which are used to simulate the optical axis of the imaging light path when the two eyes are looking straight ahead, wherein the distance between the central axes of the first optical axis reference hole 71 and the second optical axis reference hole 72 (the distance between the centers at the entrances of the first optical axis reference hole 71 and the second optical axis reference hole 72) is the pupil distance L1, and the average pupil distance of adults L1 = 63.5 mm is selected as the reference pupil distance of the reference position.

[0077] The angle β between the central axes of the first optical axis reference hole 71 and the second optical axis reference hole 72 simulates the binocular viewing angle, and the viewing angle β is mainly related to the focusing position of the binocular module. The present invention uses the first camera 1 and the second camera 2 to simulate the left eye 06 and the right eye 07, and adjusts the camera focus distance to the virtual image distance position of the monocular module. In a natural state, the refractive adjustment of the human eye near 2m is relatively comfortable, which is suitable for long-term wearing of the head-mounted device. Therefore, in this embodiment, the virtual image distance is set to 2m, the camera focus distance is adjusted to 2m, the camera aperture F number is adjusted to 2, and the camera entrance pupil position matches the exit pupil position of the module to be tested. As shown in Figure 1, the projected virtual image 08 is located at the preset binocular focus plane, and the center of the cross mark provided on the projected virtual image 08 is the intersection of the optical axis centers of the two cameras. Then, the intersection of the central axes of the first optical axis reference hole 71 and the second optical axis reference hole 72 is located at the cross intersection of the projected virtual image 08, and the virtual image distance L2 of the optical module (the distance between the camera exit pupil surface and the binocular focus plane) is 2m.

[0078] The method for determining the reference viewing angle β value is as follows: Figure 1A As shown in the figure, the distance between the first optical axis reference hole 71 and the second optical axis reference hole 72 of the binocular optical axis simulation block 7 is the pupil distance L1, and the virtual image distance is L2, then the angle β between the first optical axis reference hole 71 and the second optical axis reference hole 72 is tan -1 (L1 / L2) = tan -1 (63.5 / 2000)≈1.8°. In this embodiment, the distance between the lens of the first camera 1 and the second camera 2 and the entrance of the first optical axis reference hole 71 and the second optical axis reference hole 72 is 3 mm, and considering the simulation accuracy and processing difficulty, the hole depth of the first optical axis reference hole 71 and the second optical axis reference hole 72 is 35 mm, and the diameter of the reference hole is 10 mm. According to the above parameters, the binocular eye axis simulation block 7 is manufactured, and the binocular eye axis simulation block 7 is used to calibrate the positions of the first camera 1 and the second camera 2, so that it can simulate the positions of both eyes.

[0079] like Figure 2As shown, the camera positioning mechanism includes a binocular optical axis simulation block 7, a ring light 8 and a panel light 9. The ring light is arranged between the camera and the optical axis reference hole, and the light of the ring light can illuminate the edge of the optical axis reference hole. Preferably, the ring light 8 is respectively arranged at the front entrance of the first optical axis reference hole 71 and the second optical axis reference hole 72 of the binocular optical axis simulation block 7, and the inner diameter of the ring light 8 is larger than the inner diameter of the first optical axis reference hole 71 and the second optical axis reference hole 72. The panel light is located on the exit side of the optical axis reference hole (i.e., the side away from the camera), and the light of the panel light can evenly illuminate the exit side of the optical axis reference hole. Preferably, the panel light 9 is respectively arranged at the rear exit of the first optical axis reference hole 71 and the second optical axis reference hole 72 of the binocular optical axis simulation block 7, and the outer diameter of the panel light 9 is larger than the inner diameter of the first optical axis reference hole 71 and the second optical axis reference hole 72. The ring light 8 and the panel light 9 can be LED lights with adjustable brightness, which are used to illuminate the first optical axis reference hole 71 and the second optical axis reference hole 72, highlighting the reference hole entrance contour b and the reference hole exit contour c. According to the perspective principle, if the camera is adjusted in place, such as Figure 3 As shown in FIG. 1 , the reference hole of the binocular axis simulation block 7 forms two concentric circles of different sizes in the camera field of view; otherwise, as Figure 4 As shown, in the camera field of view, the entrance contour circle center d and the exit contour circle center e of the reference hole are eccentric and do not coincide with the camera optical axis center a.

[0080] The first optical module 01 and the second optical module 02 are respectively provided with positioning holes for temporary fixation; after the positions of the first camera 1 and the second camera 2 are adjusted into place, the first optical module 01 and the second optical module 02 are respectively fixed on the binocular bracket 03 through a positioning column, and the positioning column extends into the positioning hole of the optical module. The two are clearance-matched, so that the first optical module 01 and the second optical module 02 can rotate within a certain range under the drive of the first adjustment mechanism 3 and the second adjustment mechanism 4. The first adjustment mechanism 3 and the second adjustment mechanism 4 have a rotation drive mechanism of at least three dimensions. After the first camera 1 and the second camera 2 simulating binocular parameters are adjusted in place, the optical axes of the first optical module 01 and the second optical module 02 are adjusted to coincide with the optical axes of the first camera 1 and the second camera 2 respectively. By obtaining the rotation angle and tilt amount of the test diagram images of the first optical module 01 and the second optical module 02 respectively with the reference image, the first adjustment mechanism 3 and the second adjustment mechanism 4 respectively adjust the angles of the first optical module 01 and the second optical module 02 until the design requirements are met. After the first optical module 01 and the second optical module 02 are adjusted in place, they are installed on the binocular bracket 03.

[0081] On the basis of the above-mentioned embodiments, the adjustment and testing device for the reference position of the optical module in the binocular head-mounted device of the present invention further includes a processor 6, and the first camera 1, the second camera 2, the first optical module 01 and the second optical module 02 are electrically connected to the processor 6 respectively, and the processor 6 sends the preset test legend to the display devices of the first optical module 01 and the second optical module 02 for display, and the first camera 1 and the second camera 2 respectively transmit the captured test legend images of the first optical module 01 and the second optical module 02 to the processor 6 for analysis and processing and convert the processing results into any one or more forms of text, graphics, icons, voice, etc. for display, which is helpful for operators to observe and judge, saves the observation and conversion time of operators, and further improves work efficiency.

[0082] Preferably, the first adjustment mechanism 3 and the second adjustment mechanism 4 are electrically connected to the processor 6 respectively, and the processor 6 generates a control instruction according to the rotation angle and tilt amount of the calculated and extracted test example image relative to the reference image, and sends it to the driving mechanism of the first adjustment mechanism 3 and the second adjustment mechanism 4 respectively, and the first adjustment mechanism 3 and the second adjustment mechanism 4 respectively drive the first optical module 01 and the second optical module 02 to the target position (i.e., the position where the optical performance of the optical module is the best or the position where the imaging quality of the optical module is the best). Alternatively, the first optical module 01 and the second optical module 02 are manually adjusted to the target position according to the rotation angle and tilt amount of the image of the test example.

[0083] The test example in the above embodiment may be pre-stored in the processor 6, or may be generated by the processor according to given parameters.

[0084] method

[0085] Before the optical module reference position adjustment test, the uncalibrated adjustment test device is calibrated with necessary camera position calibration. The positions of the first camera 1 and the second camera 2 are calibrated by the binocular optical axis simulation block 7, so that the optical axes of the first camera 1 and the second camera 2 coincide with the first optical axis reference hole 71 and the second optical axis reference hole 72 of the binocular optical axis simulation block 7, respectively.

[0086] A binocular eye axis simulation block 7 is manufactured according to the preset reference position parameters of the optical module, so that the first optical axis reference hole 71 and the second optical axis reference hole 72 of the binocular eye axis simulation block 7 simulate the optical axis of the imaging light path when the two eyes are looking straight ahead, wherein the reference position parameters include the reference pupil distance L1 and the reference viewing angle; the optical axes of the first camera 1 and the second camera 2 coincide with the first optical axis reference hole 71 and the second optical axis reference hole 72 of the binocular eye axis simulation block 7 respectively, and at this time, the reference hole images observed by the cameras are concentric circles.

[0087] Based on the above-mentioned optical module assembly and adjustment testing device in the head-mounted device, the present invention provides an optical module assembly and adjustment testing method in the head-mounted device, comprising the following steps:

[0088] Step S20: The first camera 1 captures the first test image of the first optical module 01, and the second camera 2 captures the second test image of the second optical module 02. The first test image, the second test image, and the reference image are mapped to the same coordinates, and a first rotation angle α of the first test image relative to the reference image is obtained. L and a second rotation angle α of the second test image relative to the reference image R The first adjustment mechanism 3 and the second adjustment mechanism 4 are respectively based on the first rotation angle α L , the second rotation angle α R The rotation angles of the first optical module 01 and the second optical module 02 on the plane perpendicular to the optical axis are adjusted respectively.

[0089] Taking the first optical module 01 as an example, Figure 6 Test example 1 shown in the figure, obtain the first rotation angle α L The process is as follows (see Figure 7 ):

[0090] The test legend is a preset legend, which is a graphic pattern formed by several rows or series of solid circles, or a grid formed by line pairs, or horizontal and vertical lines, or a combination of solid circles and lines to form a grid, or a graphic pattern formed by a chessboard or a QR code (QR codes include rectangular coordinate QR codes and polar coordinate QR codes). Several rows or series of solid circles are optimally selected as the test legend, and the center position of the solid circle image fitting is less affected by the imaging error.

[0091] refer to Figure 6 , select the centers of the four solid circles at the four corners of the test example 1 as feature points, establish a coordinate system with the center of the most central solid circle in the test example 1 as the origin, the line connecting the centers of the solid circles in the middle row as the X-axis, and the line connecting the centers of the solid circles in the middle column as the Y-axis, and map the first test image and the reference image to the same coordinates;

[0092] Assume that the line of sight is along the optical axis of the first camera 1, the clockwise direction is positive and the counterclockwise direction is negative. The line connecting the feature points of the reference image at each selected position and the origin is taken as the reference line. The average of the angles between the lines connecting the feature points of the first test image at all selected positions and the feature points of the first test image at the origin and the reference line is taken as the first rotation angle α. L .

[0093] For test example 1, the second rotation angle α R The acquisition process refers to the first rotation angle α L The acquisition process.

[0094] Taking the second optical module 02 as an example, Figure 8 Test example 2 shown in Figure 2, obtain the second rotation angle α R The process is as follows (see Fig. 9 ):

[0095] Select the intersection of the radial line and the concentric circle of the test example 2 as the feature point, establish a coordinate system with the center of the circle in the test example 2 as the origin, the length direction of the test example 2 as the X-axis, and the width direction of the test example 2 as the Y-axis, and map the second test image and the reference image to the same coordinate;

[0096] Assume that the line of sight is along the optical axis of the second camera 2, the clockwise direction is positive and the counterclockwise direction is negative. Fit the feature points on each radial line in the second test image into a straight line. The least squares method can be used for fitting. The average of the angles between all fitting lines and the radial lines of the reference image is taken as the second rotation angle α. R .

[0097] For test example 2, the first rotation angle α L The acquisition process refers to the second rotation angle α R The acquisition process.

[0098] In another embodiment, reference Fig.10 , select the corner points of the checkerboard of the test example 3 as feature points, establish a coordinate system with the center point of the center checkerboard of the test example 3 as the origin, the length direction of the test example 3 as the X-axis, and the width direction of the test example 3 as the Y-axis, and map the second test image and the reference image to the same coordinate system;

[0099] Assume that the line of sight is along the optical axis direction of the second camera 2, the clockwise direction is positive, and the counterclockwise direction is negative. In the second test image, the images of the feature points in any X-axis direction and Y-axis direction are respectively fitted into a straight line. The least squares method can be used for fitting, and the average of the angles between the fitting lines of the images of all feature points in the X-axis direction and the X-axis and the angles between the fitting lines of the images of all feature points in the Y-axis direction and the Y-axis is taken as the second rotation angle α R .

[0100] For test example 3, the first rotation angle α L The acquisition process refers to the second rotation angle α R The acquisition process.

[0101] In another embodiment, reference Fig.11 , select the solid line intersection of the test example 4 as the feature point, take the solid line intersection at the center of the test example 4 as the origin, establish a coordinate system with the length direction of the test example 4 as the X-axis and the width direction of the test example 4 as the Y-axis, and map the first test image and the reference image to the same coordinate;

[0102] Assume that the line of sight is along the optical axis direction of the first camera 1, the clockwise direction is positive, and the counterclockwise direction is negative. The images of the feature points in any X-axis direction and Y-axis direction in the image of the test example 4 are fitted into a straight line respectively. The least squares method can be used for fitting, and the angles between the fitting lines of the images of all feature points in the X-axis direction and the X-axis and the average of the angles between the fitting lines of the images of all feature points in the Y-axis direction and the Y-axis are taken as a rotation angle α L .

[0103] For test example 4, the second rotation angle α R The acquisition process refers to the first rotation angle α L The acquisition process.

[0104] like Figure 7 As shown, the process of the first adjustment mechanism 3 adjusting the rotation angle of the first optical module 01 is as follows:

[0105] Assume that the line of sight is along the optical axis of the first camera 1. If the first rotation angle α L is positive, indicating that the first test image is rotated clockwise by α relative to the test example at the target position L , the first adjustment mechanism 3 drives the first optical module 01 to rotate counterclockwise α L ;

[0106] If the first rotation angle α L is negative, indicating that the first test image is rotated counterclockwise |α relative to the test legend of the target position L |, then the first adjustment mechanism 3 drives the first optical module 01 to rotate clockwise |α L |.

[0107] The process of adjusting the rotation angle of the second optical module 02 by the second adjusting mechanism 4 refers to the process of adjusting the rotation angle of the first optical module 01 by the first adjusting mechanism 3 .

[0108] Step S30, the first camera 1 captures a first test image formed by the test pattern through the first optical module 01, and the second camera 2 captures a second test image formed by the test pattern through the second optical module 02, maps the first test image, the second test image, and the reference image to the same coordinates, and obtains first tilt amounts (x, y) of the first test image and the second test image relative to the reference image in the X-axis and Y-axis directions, respectively. L ,y L ) and the second tilt (x R ,y R ), and the first adjustment mechanism 3 and the second adjustment mechanism 4 are configured to adjust the first tilt amount (x L ,y L ) and the second tilt (x R ,yR ) respectively adjust the tilt amounts of the first optical module 01 and the second optical module 02.

[0109] Taking the first optical module 01 as an example, Figure 6 The test example 1 shown in FIG. 1 obtains the first tilt value (x L ,y L ) process is as follows:

[0110] A coordinate system is established with the center of the solid circle in the center of the test example 1 as the origin, the line connecting the centers of the solid circles in the middle row as the X-axis, and the line connecting the centers of the solid circles in the middle column as the Y-axis. The centers of the two solid circles at the outermost positions on the X-axis and the two solid circles at the outermost positions on the Y-axis are selected as feature points, and the first test image and the reference image are mapped to the same coordinates;

[0111] The solid circle of the test legend image at the selected reference position is taken as the origin, and the X-axis and Y-axis are in the same direction as the original coordinate axis to re-establish the coordinate system, and obtain the inclination of the feature point of the first test image at each position relative to the feature point (new origin) of the reference image at that position on the X-axis and Y-axis, and take the average of the inclinations at all the feature points obtained as the first inclination (x L ,y L ).

[0112] For test example 1, the second tilt (x R ,y R ) is obtained by referring to the first tilt value (x L ,y L ) acquisition process.

[0113] Taking the second optical module 02 as an example, Figure 8 The second test example shown in FIG. 2 obtains the second tilt value (x R ,y R ) process is as follows:

[0114] Select the intersection of the radial line and the concentric circle of the test example 2 as the feature point, establish a coordinate system with the center of the circle in the test example 2 as the origin, the length direction of the test example 2 as the X-axis, and the width direction of the test example 2 as the Y-axis, and map the second test image and the reference image to the same coordinate;

[0115] The intersection of the concentric circles and the radial lines at the position of each feature point is taken as the origin, and the X-axis and Y-axis are in the same direction as the original coordinate axis to re-establish the coordinate system. The inclination of the feature point of the second test image at each position relative to the feature point (new origin) at the intersection of the concentric circles and the radial lines at that position on the X-axis and Y-axis is obtained, and the average of the inclinations at all feature points is taken as the second inclination (x R ,y R).

[0116] like Figure 7 As shown, the process of the first adjustment mechanism 3 adjusting the tilt amount of the first optical module 01 is as follows:

[0117] Assume that the line of sight is along the positive direction of the X axis and the positive direction of the Y axis respectively. If the first tilt (x L ,y L ), x L and L Is positive, indicating that the first test image is rotated clockwise around the Y axis x L , rotate y counterclockwise around the X axis L , the first adjustment mechanism 3 drives the first optical module 01 to rotate counterclockwise around the Y axis by x L , rotate y clockwise around the X axis L ;

[0118] If x L and L is negative, indicating that the first test image is rotated counterclockwise around the Y axis |x L |, rotate clockwise around the X axis |y L |, then the first adjustment mechanism 3 drives the first optical module 01 to rotate clockwise around the Y axis |x L |, counterclockwise rotation around the X axis |y L |;

[0119] If x L is positive, y L If it is negative, it means that the first test image is rotated clockwise around the Y axis x L , rotate clockwise around the X axis |y L |, the first adjustment mechanism 3 drives the first optical module 01 to rotate counterclockwise around the Y axis x L , counterclockwise rotation around the X axis |y L |;

[0120] If x L is negative, y L is positive, indicating that the first test image is rotated counterclockwise around the Y axis |x L |、Rotate y counterclockwise around the X axis L , the first adjustment mechanism 3 drives the first optical module 01 to rotate clockwise around the Y axis |x L |、Rotate y clockwise around the X axis L .

[0121] The process of adjusting the tilt amount of the second optical module 02 by the second adjusting mechanism 4 refers to the process of adjusting the tilt amount of the first optical module 01 by the first adjusting mechanism 3 .

[0122] Verify whether the rotation angle difference and tilt difference between the first optical module (01) and the second optical module (02) are within a predetermined range at the current position. If so, directly execute step S50; if not, repeat steps S20 to S40.

[0123] In step S40, the first camera 1 captures a first test image formed by the test pattern through the first optical module 01, and the second camera 2 captures a second test image formed by the test pattern through the second optical module 02. The first test image, the second test image, and the reference image are mapped to the same coordinates, and a first rotation angle α of the first test image relative to the reference image is obtained. L and a second rotation angle α of the second test image relative to the reference image R and obtaining first tilt amounts (x, y) of the first test image and the second test image relative to the reference image in the X-axis and Y-axis directions, respectively. L ,y L ) and the second tilt (x R ,y R ), verify the first rotation angle α obtained L , the second rotation angle α R , the first tilt (x L ,y L ) and the second tilt (x R ,y R ) meets the design requirements, that is, whether the rotation angle difference and the tilt difference between the first optical module 01 and the second optical module 02 are within a predetermined range; if within the predetermined range, directly execute step S50; if not within the predetermined range, repeat steps S20 to S40.

[0124] Step S50 , fixing the adjusted first optical module 01 and the second optical module 02 to the binocular bracket 03 .

[0125] Based on the above-mentioned optical module assembly and adjustment test device and assembly and adjustment test method in the binocular head-mounted device, the present invention realizes fixing the two optical modules to the binocular bracket 03, ensuring that the imaging quality of the reference position of the optical module meets the design requirements and conforms to the subjective visual perception of the human eye. The present invention has the following beneficial effects:

[0126] (a) The assembly and adjustment test device of the present invention uses dual cameras to simulate the imaging effect of both eyes. The optical parameters of the cameras simulate the optical parameters of the human eye reference position to ensure that the imaging effect is consistent with the imaging of the human eye, so that the imaging meets the comfort level of the human eye;

[0127] (b) Calculating the reference viewing angle β of the optical module according to the preset reference pupil distance L1 and virtual image distance L2, and making a binocular eye axis simulation block 7 for calibrating the camera position. Compared with the traditional direct camera calibration, the operation is simple and suitable for batch installation occasions;

[0128] (c) The first camera 1 and the second camera 2 are used to respectively capture images of the test diagrams displayed by the display devices in the first optical module and the second optical module to obtain the first test image and the second test image, and the rotation angle and the tilt amount of the first test image and the second test image relative to the reference image are obtained. The first adjustment mechanism and the second adjustment mechanism are used to adjust the angles of the first optical module and the second optical module according to the obtained rotation angle and the tilt amount, respectively, to compensate for the adverse effects of the structural tolerance and assembly tolerance of other optical components of the optical module on the imaging quality, thereby ensuring good imaging quality, completing the test of the optical module while assembling, improving the product yield and the efficiency of finished product assembly testing, and ensuring the consistency of the optical module product;

[0129] The assembly, adjustment and testing device of the present invention is simple to operate, stable and reliable, has good consistency, and is adaptable to mass production requirements.

[0130] Those skilled in the art should understand that these embodiments are only used to illustrate the present invention but not to limit the scope of the present invention, and various equivalent variations and modifications made to the present invention belong to the disclosure of the present invention.

Claims

1. An optical module assembly and testing device in a binocular head mounted device, used for fixing a first optical module (01) and a second optical module (02) on a binocular support (03) according to reference position parameters, characterized in that: include: A first camera (1) and a second camera (2) are used to simulate a human eye structure having the reference position parameters; The first adjustment mechanism (3) and the second adjustment mechanism (4) are used to adjust the rotational position of the first optical module (01) and the second optical module (02), respectively, wherein the rotational position includes a rotational angle and a position offset relative to a target position. The processor (6) is used for analyzing the images captured by the first camera (1) and the second camera (2); The first camera (1) and the second camera (2) are respectively used to capture a first test image of the test pattern formed by the first optical module (01) and a second test image of the test pattern formed by the second optical module (02); the processor (6) is used to obtain a first rotation angle α of the first test image relative to the reference image in the coordinate system. L and a second rotation angle α of the second test image relative to the reference image in the coordinate system. R , wherein the first test image and the second test image and the reference image are mapped to the same coordinate system; when the first optical module (01) and the second optical module (02) are respectively in the same straight line with the optical axes of the first camera (1) and the second camera (2) simulating the human eye structure with reference position parameters, the first test image and the second test image are mapped to the same coordinate system and substantially overlap, and the test images at this time serve as the reference images of the test example; the first adjustment mechanism (3) and the second adjustment mechanism (4) are respectively used to adjust the first rotation angle α according to the obtained first rotation angle α L The second rotation angle α R , respectively adjusting the rotation angles of the first optical module (01) and the second optical module (02), and The first camera (1) and the second camera (2) are respectively used to capture a first test image formed by the first optical module (01) of the test example at the current position and a second test image formed by the second optical module (02); the processor (6) is used to respectively obtain a first position offset (x) of the first test image and the second test image relative to the reference image in the coordinate system. L ,y L ) and the second position offset (x R ,y R ), wherein the first test image, the second test image and the reference image are mapped to the same coordinate system; the first adjustment mechanism (3) and the second adjustment mechanism (4) are respectively used to adjust the first position offset (x) according to the obtained first position offset L ,y L ) and the second position offset (x R ,y R ), respectively adjusting the position offset of the first optical module (01) and the second optical module (02).

2. The optical module assembly and testing device in a binocular head mounted device according to claim 1, characterized in that: The reference position parameters include a reference pupil distance L1 and a reference viewing angle β, and the target position refers to a position where the first optical module (01) and the second optical module (02) are respectively in the same straight line with the optical axes of the first camera (1) and the second camera (2) simulating the human eye structure having the reference position parameters.

3. The optical module assembly and testing device in a binocular head mounted device according to claim 2, characterized in that: It also includes a camera positioning mechanism for calibrating the positions of the first camera (1) and the second camera (2) according to the reference position parameters.

4. The optical module assembly and testing device in a binocular head mounted device according to claim 3, characterized in that: The camera positioning mechanism comprises a binocular eye axis simulation block for simulating the reference position parameter human eye structure.

5. The optical module assembly and testing device in a binocular head mounted device according to claim 4, characterized in that: The binocular optical axis simulation block (7) is provided with a first optical axis reference hole (71) and a second optical axis reference hole (72); the distance between the central axes of the first optical axis reference hole (71) and the second optical axis reference hole (72) is a reference pupil distance L1; the reference pupil distance L1 is 55 mm-75 mm; and the angle between the central axes of the first optical axis reference hole (71) and the second optical axis reference hole (72) is equal to a reference viewing angle β.

6. The optical module assembly and testing device in a binocular head mounted device according to claim 5, characterized in that: The camera positioning mechanism also includes an illumination mechanism for illuminating the edges of the first optical axis reference hole (71) and the second optical axis reference hole (72).

7. The optical module assembly and testing device in a binocular head mounted device according to claim 6, characterized in that: The lighting mechanism includes at least one of a ring light or a panel light; The ring lights are respectively arranged at the front entrances of the first optical axis reference hole (71) and the second optical axis reference hole (72), and the inner diameter of the ring lights is larger than the inner diameters of the first optical axis reference hole (71) and the second optical axis reference hole (72); The panel lights are respectively arranged at the rear exits of the first optical axis reference hole (71) and the second optical axis reference hole (72), and the outer diameter of the panel lights is larger than the inner diameters of the first optical axis reference hole (71) and the second optical axis reference hole (72).

8. The optical module assembly and testing device in a binocular head mounted device according to any one of claims 1 to 6, characterized in that: It also includes a support fixing device (5) for fixing the binocular support (03).

9. The optical module assembly and testing device in a binocular head mounted device according to any one of claims 1 to 6, characterized in that: It also includes a processor (6), and the first camera (1), the second camera (2), the first optical module (01) and the second optical module (02) are electrically connected to the processor (6) respectively.

10. The optical module assembly and testing device in a binocular head mounted device according to claim 9, characterized in that: The first adjustment mechanism (3) and the second adjustment mechanism (4) are electrically connected to the processor (6) respectively.

11. A method for adjusting and testing an optical module in a binocular head mounted device, using the device for adjusting and testing an optical module in a binocular head mounted device according to any one of claims 1 to 10 for operation, comprising the following steps: Step S20, collecting a first test image of the test example formed by the first optical module (01) and a second test image of the test example formed by the second optical module (02), mapping the collected first test image, the second test image and the reference image to the same coordinate system, and obtaining a first rotation angle α of the first test image relative to the reference image in the coordinate system L and a second rotation angle α of the second test image relative to the reference image in the coordinate system. R ; According to the first rotation angle α obtained L The second rotation angle α R respectively adjusting the rotation angles of the first optical module (01) and the second optical module (02); Step S30, collecting a first test image of the test example at the current position imaged by the first optical module (01) and a second test image of the test example imaged by the second optical module (02), mapping the collected first test image, the second test image and the reference image to the same coordinate system, and respectively obtaining a first position offset (x) of the first test image and the second test image relative to the reference image in the coordinate system. L ,y L ) and the second position offset (x R ,y R ); According to the first position offset (x L ,y L ) and the second position offset (x R ,y R ) respectively adjusting the position offset of the first optical module (01) and the second optical module (02); Step S50: fixing the first optical module (01) and the second optical module (02) to a binocular support (03).

12. The method for assembling and testing an optical module in a binocular head mounted device according to claim 11, characterized in that: The test illustration is a preset illustration.

13. The method for assembling and testing an optical module in a binocular head mounted device according to claim 12, characterized in that: The preset legend is a graphic pattern formed by several rows or columns of solid circles, or squares formed by line pairs, or horizontal and vertical lines, or a combination of solid circles and lines on squares, or a graphic pattern formed by a chessboard or a QR code.

14. The method for assembling and adjusting an optical module in a binocular head mounted device according to any one of claims 11 to 13, characterized in that: In step S20, the first rotation angle α is obtained. L and the second rotation angle α R The steps include: A coordinate system is established with the center point of the test diagram as the origin, the length direction of the display area of ​​the display device of the optical module as the X-axis direction, and the width direction of the display device as the Y-axis direction, and the first test image, the second test image and the reference image are mapped to the same coordinate system; One or more feature points are selected on the straight line passing through the origin in the reference image, and the line connecting any feature point and the origin in the reference image is used as the reference line. The feature point image on the reference line corresponding to the first test image or the second test image is fitted into a straight line using the least squares method, and the average of the angles between all fitting lines and the corresponding reference line is used as the first rotation angle α L Or the second rotation angle α R .

15. The method for assembling and testing an optical module in a binocular head mounted device according to claim 11, characterized in that: In step S30, the first position offset (x L ,y L ) and the second position offset (x R ,y R ) steps include: Selecting feature points of the test example, and establishing a coordinate system with the center point of the test example as the origin, the length direction of the display area of ​​the display device of the optical module as the X-axis direction, and the width direction of the display device as the Y-axis direction, and mapping the first test image, the second test image and the reference image to the same coordinate; The feature point of the reference image is used as the new origin, and the original X-axis and Y-axis directions are used as the new X-axis and Y-axis directions to re-establish the coordinate system, obtain the position offset of the same feature point of the first test image or the second test image relative to the new origin on the X-axis and Y-axis, and take the average of the position offsets of all feature points obtained as the first position offset (x L ,y L ) or the second position offset (x R ,y R ).

16. The method for assembling and testing an optical module in a binocular head mounted device according to claim 11, characterized in that: A step S40 is further included between step S30 and step S50, and the step S40 includes: Verify whether the rotation angle difference and position offset difference between the first optical module (01) and the second optical module (02) are within a predetermined range at the current position. If so, execute step S50; if not, repeat steps S20 to S40.

17. The method for assembling and adjusting the optical module in a binocular head mounted device according to claim 11, characterized in that: The method further comprises step S10 of calibrating the positions of the first camera (1) and the second camera (2) by means of a camera positioning mechanism.

18. The method for assembling and adjusting the optical module in the binocular head mounted device according to claim 17, characterized in that: In step S10, the camera positioning mechanism calibrates the positions of the first camera (1) and the second camera (2) by respectively photographing the image of the first optical axis reference hole (71) and the image of the second optical axis reference hole (72) of the binocular optical axis simulation block (7) with the first camera (1) and the second camera (2), and adjusts the positions of the first camera (1) and the second camera (2) until the image of the first optical axis reference hole (71) and the image of the second optical axis reference hole (72) are both concentric circles.

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