A binocular camera optical axis calibration method and device for VR testing

Abstract

The present invention relates to the field of VR testing technology, and in particular to a binocular camera optical axis calibration method and device for VR testing, comprising a base, a laser platform, a first adjustment platform, a second adjustment platform and a third adjustment platform, wherein the laser platform, the first adjustment platform, the second adjustment platform and the third adjustment platform are arranged on the base in an array, the laser platform comprises a second support frame and a laser module, the laser module is fixedly arranged on the base and located beside the second support frame, the first adjustment platform comprises a first angular position adjustment module and a camera adjustment module, and the present invention can achieve the effect of adjusting the test optical axis spacing, camera optical axis adjustment and IPD of a VR binocular near-eye display module through the laser platform, the first adjustment platform, the second adjustment platform and the third adjustment platform, which is safe, efficient, accurate and measurable, and greatly improves the efficiency of binocular camera optical axis calibration for VR testing.

Description

Technical Field

[0001] The present invention relates to the field of VR testing technology, and in particular to a binocular camera optical axis calibration method and device for VR testing. Background Art

[0002] Currently, there are few VR evaluation devices, and there is no ready-made evaluation and testing equipment for VR binocular display modules on the market. During the research and development process, in order to objectively evaluate the indicators of VR headset binocular display modules, it is necessary to use a binocular camera that simulates the human eye, and the optical axis distance of the binocular camera is required to be consistent with the IPD of the VR headset and remain horizontal. However, the optical axis of the camera cannot be seen, so it needs to be determined through auxiliary means.

[0003] my country's patent application number: CN201710517281.1; Publication date: 2017.10.10 discloses a panoramic camera optical axis calibration device, including a box frame, each surface of the box frame is provided with a picture card module and a light source module, the picture card module is arranged on the inner side of the light source module, and the picture card module and the light source module close the box frame; one of the surfaces of the box frame is provided with a passage opening that passes through the interior thereof, the outer side of the box frame is provided with a bottom plate frame, and the bottom plate frame is slidably connected with a propulsion module, the propulsion module is arranged at a position corresponding to the passage opening, and the propulsion module is used to slide the camera into the interior of the box frame. The panoramic camera optical axis calibration device of the present invention fills the invalid area through the fully wrapped environment construction method, improves the calibration accuracy of the panoramic camera optical axis, and ensures the quality of the camera.

[0004] The above case structure has the following deficiencies:

[0005] 1. The bottom frame of the device is provided with a guide rail, and the top rod is slidably connected to the guide rail and can slide along the guide rail to the inside of the box frame. After the camera is fixed on the fixed seat, the driving mechanism can be used to drive the top rod to slide along the guide rail, and then the camera can be slid and sent into the inside of the box frame. The camera itself cannot adjust its position and is greatly limited.

[0006] 2. The first positioning hole of the device is set on the side away from the box frame. As the top rod slides and enters the interior of the box frame, the first positioning hole at the bottom of the top rod will approach the first positioning column. When the camera is sent to a certain position inside the box frame, the first positioning column is plugged into the first positioning hole, and the camera stays at this position and remains motionless to complete the subsequent coordinate reading. The plugging will cause some deviation in the position, and the reading of its coordinates lacks reference comparison.

[0007] In view of the shortcomings of the existing technology: it is necessary to design a binocular camera optical axis calibration method and device for VR testing, which is used to accurately adjust the optical axis of the binocular camera for evaluation of VR head-mounted display binocular display modules. Summary of the invention

[0008] The object of the present invention is to provide a binocular camera optical axis calibration method and device for VR testing.

[0009] To achieve this object, the present invention adopts the following technical solutions:

[0010] Provided is an operation method for a binocular camera optical axis calibration device for VR testing, comprising a base, a laser platform, a first adjustment platform, a second adjustment platform and a third adjustment platform, wherein the laser platform, the first adjustment platform, the second adjustment platform and the third adjustment platform are arranged on the base in an array, the first adjustment platform is arranged between the laser platform and the second adjustment platform, and the second adjustment platform is arranged between the first adjustment platform and the third adjustment platform, the laser platform comprises a second support frame and a laser module, the second support frame is vertically fixed on the base, the laser module is fixed on the base and is located beside the second support frame, the first adjustment platform comprises a first angle adjustment module and a camera adjustment module, the first angle adjustment module is fixed on the base, and the camera adjustment module is fixed on the top of the first angle adjustment module.

[0011] The laser module includes a first support frame, a semiconductor adjustment and fixing frame and a semiconductor laser. The first support frame is fixedly arranged on the base and is located beside the second support frame. The semiconductor adjustment and fixing frame can be adjusted on the top of the first support frame. The semiconductor laser is fixed on the semiconductor adjustment and fixing frame. Two small hole light barriers are symmetrically arranged on the top of the second support frame.

[0012] The first angle adjustment module includes a first X-direction translation adjustment platform, a first Y-direction translation adjustment platform, a first Z-direction translation adjustment platform, a first X-direction angle platform, a first Y-direction angle platform and a first rotation adjustment platform, wherein the first X-direction translation adjustment platform is slidably arranged on the base in the X direction, the first Y-direction translation adjustment platform is slidably arranged on the top of the first X-direction translation adjustment platform in the Y direction, the first Z-direction translation adjustment platform is slidably arranged on the top of the first Y-direction translation adjustment platform in the vertical direction, the first X-direction angle platform is rotationally arranged on the top of the first Z-direction translation adjustment platform in the X direction, the first Y-direction angle platform is rotationally arranged on the top of the first X-direction angle platform in the Y direction, and the first rotation adjustment platform is rotationally arranged on the top of the first Y-direction angle platform.

[0013] The camera adjustment module includes a third support frame, a camera fixing substrate, a first flat glass, a first camera adjustment seat, a second camera adjustment seat, a first-level camera, a second-level camera and a computer. The third support frame is vertically fixed on the top of the first rotating adjustment platform, the camera fixing substrate is vertically fixed on the top of the third support frame, the first flat glass is fixedly embedded in the bottom of the camera fixing substrate, the first camera adjustment seat and the second camera adjustment seat are both adjusted and set on the top of the camera fixing substrate, and the first camera adjustment seat is located on the top of the second camera adjustment seat, the first-level camera and the second-level camera are respectively horizontally fixed on one side of the first camera adjustment seat and the second camera adjustment seat, the computer is set beside the first-level camera and the second-level camera, and the computer is electrically connected to the first-level camera and the second-level camera.

[0014] The second adjustment platform includes a second X-direction angle table, a second Y-direction angle table, a second rotation adjustment table, a fourth support frame and a second flat glass. The second X-direction angle table is rotatably arranged on the base in the X direction, the second Y-direction angle table is rotatably arranged on the top of the second X-direction angle table in the Y direction, the second rotation adjustment table is rotatably arranged on the top of the second Y-direction angle table, the fourth support frame is fixedly arranged on the top of the second rotation adjustment table in a vertical state, and the second flat glass is fixedly embedded in the top of the fourth support frame in a vertical state.

[0015] The third adjustment platform includes a third X-direction angle table, a third Y-direction angle table, a third rotation adjustment table, a fifth support frame and a reflector. The third X-direction angle table is rotatably arranged on the base in the X direction, the third Y-direction angle table is rotatably arranged on the top of the third X-direction angle table in the Y direction, the third rotation adjustment table is rotatably arranged on the top of the third Y-direction angle table, the fifth support frame is fixedly arranged on the top of the third rotation adjustment table in a vertical state, and the reflector is fixedly installed on the top of the fifth support frame in a vertical state.

[0016] An operating method of a binocular camera optical axis calibration device for VR testing comprises the following steps:

[0017] Step 1: Through the adjustment of this device, the optical axes of the primary camera and the secondary camera can be parallel and perpendicular to the surface of the first flat glass, and the distance between the optical axes can be adjusted to a required value.

[0018] By operating the camera adjustment module, the third support frame is fixedly mounted on the first rotation adjustment platform, and the first rotation adjustment platform is operated to adjust the first X-direction angular platform, the first Y-direction angular platform, the first X-direction translation adjustment platform, the first Y-direction translation adjustment platform and the first Z-direction translation adjustment platform respectively and fix them by screws.

[0019] Fix the second flat glass on the second rotating adjustment table through the fourth support frame, adjust the second rotating adjustment table, adjust the second X-direction angle table and the second Y-direction angle table respectively and fix them by screws.

[0020] Fix the reflector on the third rotation adjustment table through the fifth support frame, adjust the third rotation adjustment table, adjust the third X-direction angle table and the third Y-direction angle table respectively, and fix them by screws.

[0021] The semiconductor laser is fixed in position by a semiconductor adjusting fixture.

[0022] After the operation is completed, there are two cross lines on the second flat glass with a center distance equal to the IPD of the VR binocular near-eye display module.

[0023] Step 2: Use semiconductor laser to make the camera fixed substrate, the first flat glass and the reflective mirror parallel and perpendicular to the semiconductor laser.

[0024] The semiconductor adjustment fixing frame is adjusted to adjust the position of the laser. The camera fixing substrate and the first flat glass are adjusted by operating the first X-direction angle table, the first Y-direction angle table, the first X-direction translation adjustment table, the first Y-direction translation adjustment table, the first Z-direction translation adjustment table and the first rotation adjustment table of the first adjustment platform. The position of the reflector is adjusted by the third X-direction angle table, the third Y-direction angle table and the third rotation adjustment table of the third adjustment platform, so that the reflected light beam of the laser on the second flat glass on the camera fixing substrate, the first flat glass and the reflector returns to the exit point along the original path.

[0025] The center distance between the two cross lines of the second flat glass is the IPD of the VR binocular near-eye display module.

[0026] The positions of the primary camera and the secondary camera are adjusted by adjusting the first camera adjustment seat and the second camera adjustment seat in the camera adjustment module, so that the midpoint of the cross line on the second glass plate is recorded as LR, and the midpoint of the cross line virtual image in the reflector is recorded as L'R', which coincides with the midpoint of the camera LR image.

[0027] Step 3: Camera optical axis adjustment method.

[0028] A semiconductor laser is used to make the laser beam emit through the pinhole light barrier, and a reflected light beam is generated on the first flat glass, the second flat glass and the reflector surface. The rotation angle and the pitch angle of the reflector are adjusted by the third rotation adjustment table, the third X-direction angular position table and the third Y-direction angular position table, so that the reflector reflects the light beam back to the pinhole light barrier, and the laser beam is perpendicular to the reflector surface.

[0029] Similarly, adjust the second rotary adjustment table, the second X-direction angular table and the second Y-direction angular table to make the laser beam perpendicular to the second flat glass surface, and adjust the first rotary adjustment table, the second X-direction angular table and the second Y-direction angular table to make the laser beam perpendicular to the first flat glass surface.

[0030] Adjust the first camera adjustment seat, the midpoint on the second flat glass is marked as 1, and the midpoint 1' of the image in the reflector coincides with the midpoint 1 of the primary camera image, and the straight line on the flat glass marked as H1H2 also coincides with the primary camera image marked as H11H12.

[0031] Adjust the second camera adjustment seat, the midpoint on the second flat glass is marked as 2, the midpoint 2' of the image in the reflector coincides with the midpoint of the secondary camera image, and the straight line on the flat glass is marked as H1H2 and also coincides with the secondary camera image H21H22.

[0032] The line connecting the midpoints 1' and 2' of the images in the mirrors of the pattern midpoints 1 and 2 on the flat glass is perpendicular to the reflector, so the optical axes of the adjusted cameras 1 and 2 are perpendicular to the reflector, that is, the optical axes of the primary camera and the secondary camera are parallel, and the optical axis distance is the set IPD value. The camera adjustment module adjusted by this method can be used to evaluate the assembly tolerance of the VR binocular display module, the center adjustment of the left and right eye display images, etc.

[0033] Beneficial effects of the present invention:

[0034] 1. By operating the camera adjustment module, the third support frame is fixedly installed on the first rotation adjustment platform, the first rotation adjustment platform is operated, and the first X-direction angle platform, the first Y-direction angle platform, the first X-direction translation adjustment platform, the first Y-direction translation adjustment platform and the first Z-direction translation adjustment platform are respectively adjusted and fixed by screws, and the second flat glass is fixed on the second rotation adjustment platform through the fourth support frame, and the second rotation adjustment platform is adjusted, and the second X-direction angle platform and the second Y-direction angle platform are respectively adjusted and fixed by screws, and the reflector is fixed on the third rotation adjustment platform through the fifth support frame, and the third rotation adjustment platform is adjusted, and the third X-direction angle platform and the third Y-direction angle platform are respectively adjusted and fixed by screws, and the semiconductor laser is fixed in position through the semiconductor adjustment fixing frame. After the operation is completed, there are two cross lines on the second flat glass with a center distance of the IPD of the VR binocular near-eye display module. Through the adjustment of this device, the optical axes of the primary camera and the secondary camera can be parallel, both perpendicular to the surface of the first flat glass, and the optical axis spacing can be adjusted to the required value.

[0035] 2. Adjust the semiconductor adjustment bracket to adjust the position of the laser. Adjust the camera fixed substrate and the first flat glass by operating the first X-direction angle stage, the first Y-direction angle stage, the first X-direction translation adjustment stage, the first Y-direction translation adjustment stage, the first Z-direction translation adjustment stage and the first rotation adjustment stage of the first adjustment platform. Adjust the position of the reflector by the third X-direction angle stage, the third Y-direction angle stage and the third rotation adjustment stage of the third adjustment platform, so that the reflected light beam of the laser on the second flat glass, the first flat glass and the reflector on the camera fixed substrate returns to the exit point along the original path. The center distance between the two cross lines of the second flat glass is the IPD of the VR binocular near-eye display module. Adjust the positions of the primary camera and the secondary camera by adjusting the first camera adjustment seat and the second camera adjustment seat in the camera adjustment module, so that the midpoint of the cross line on the second glass plate is recorded as LR, and the midpoint of the virtual image of the cross line in the reflector is recorded as L'R', which overlaps with the midpoint of the camera LR image. Through the semiconductor laser, the camera fixed substrate, the first flat glass and the reflector are parallel and perpendicular to the semiconductor laser.

[0036] 3. Adjust the rotation angle and pitch angle of the reflector through the third rotation adjustment table, the third X-direction angle table and the third Y-direction angle table, so that the light beam reflected by the reflector returns to the pinhole light barrier, and the laser beam is perpendicular to the surface of the reflector. Similarly, adjust the second rotation adjustment table, the second X-direction angle table and the second Y-direction angle table, so that the laser beam is perpendicular to the surface of the second flat glass. Adjust the first rotation adjustment table, the second X-direction angle table and the second Y-direction angle table, so that the laser beam is perpendicular to the surface of the first flat glass. Adjust the first camera adjustment seat, the midpoint on the second flat glass is marked as 1, the midpoint 1' of the image in the reflector coincides with the midpoint 1 of the primary camera image, and the straight line marked as H1H2 on the flat glass also coincides with the image of the primary camera marked as H11H12. Adjust the first camera adjustment seat, the midpoint on the second flat glass is marked as 1, the midpoint 1' of the image in the reflector coincides with the midpoint 1 of the primary camera image, and the straight line marked as H1H2 on the flat glass coincides with the image of the primary camera marked as H11H12. The second camera adjustment seat, the midpoint on the second flat glass is marked as 2, the midpoint 2' of the image in the reflector coincides with the midpoint of the secondary camera image, and the straight line on the flat glass is marked as H1H2 and also coincides with the secondary camera image H21H22. The line connecting the midpoints 1 and 2 of the pattern on the flat glass and the midpoints 1 and 2 of the image in the mirror is perpendicular to the reflector. Therefore, the optical axes of the adjusted cameras 1 and 2 are perpendicular to the reflector, that is, the optical axes of the primary camera and the secondary camera are parallel, and the optical axis distance is the set IPD value. The camera adjustment module adjusted by this method can be used to evaluate the assembly tolerance of the VR binocular display module, the center adjustment of the left and right eye display images, etc. A semiconductor laser is used to make the laser beam pass through a small hole light barrier to emit a reflected light beam on the surface of the first flat glass, the second flat glass and the reflector.

[0037] The present invention can adjust the test optical axis spacing, camera optical axis and IPD of the VR binocular near-eye display module through the laser platform, the first adjustment platform, the second adjustment platform and the third adjustment platform. It is safe, efficient, accurate and measurable, which greatly improves the efficiency of binocular camera optical axis calibration for VR testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0039] Figure 1 A schematic diagram of the present invention Figure 1 ;

[0040] Figure 2 A schematic diagram of the present invention Figure 2 ;

[0041] Figure 3 A schematic diagram of the present invention Figure 3 ;

[0042] Figure 4 It is a schematic diagram of a plane image of a camera adjustment module of the present invention;

[0043] Figure 5 The cross-line pattern shown on the second flat glass of the present invention;

[0044] Figure 6 is a schematic diagram of a virtual image of a second flat glass of the present invention;

[0045] Figure 7 is the primary camera image of the present invention;

[0046] Figure 8 is the secondary camera image of the present invention;

[0047] In the figure: base 1, laser platform 2, second support frame 20, pinhole light barrier 200, laser module 21, first support frame 210, semiconductor adjustment fixing frame 211, semiconductor laser 212, first adjustment platform 3, first angular adjustment module 30, first X-direction translation adjustment platform 300, first Y-direction translation adjustment platform 301, first Z-direction translation adjustment platform 302, first X-direction angular platform 303, first Y-direction angular platform 304, first rotation adjustment platform 305, camera adjustment module 31, third support frame 3 10. Camera fixing substrate 311, first flat glass 312, first camera adjustment seat 313, second camera adjustment seat 314, primary camera 315, secondary camera 316, computer 317, second adjustment platform 4, second X-direction angular position platform 40, second Y-direction angular position platform 41, second rotation adjustment platform 42, fourth support frame 43, second flat glass 44, third adjustment platform 5, third X-direction angular position platform 50, third Y-direction angular position platform 51, third rotation adjustment platform 52, fifth support frame 53, and reflector 54. DETAILED DESCRIPTION

[0048] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0049] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0050] Reference Figure 1 to Figure 2 An operating method of a binocular camera optical axis calibration device for VR testing is shown, comprising a base 1, a laser platform 2, a first adjustment platform 3, a second adjustment platform 4 and a third adjustment platform 5, wherein the laser platform 2, the first adjustment platform 3, the second adjustment platform 4 and the third adjustment platform 5 are arranged on the base 1 in an array, the first adjustment platform 3 is arranged between the laser platform 2 and the second adjustment platform 4, and the second adjustment platform 4 is arranged between the first adjustment platform 3 and the third adjustment platform 5, the laser platform 2 comprises a second support frame 20 and a laser module 21, the second support frame 20 is vertically fixed on the base 1, the laser module 21 is fixed on the base 1 and is located beside the second support frame 20, the first adjustment platform 3 comprises a first angle adjustment module 30 and a camera adjustment module 31, the first angle adjustment module 30 is fixed on the base 1, and the camera adjustment module 31 is fixed on the top of the first angle adjustment module.

[0051] Reference Figures 3 to 8The laser module 21 shown includes a first support frame 210, a semiconductor adjustment fixing frame 211 and a semiconductor laser 212. The first support frame 210 is fixedly arranged on the base 1 and is located next to the second support frame 20. The semiconductor adjustment fixing frame 211 is adjustably arranged on the top of the first support frame 210. The semiconductor laser 212 is fixedly arranged on the semiconductor adjustment fixing frame 211. Two small hole light barriers 200 are symmetrically arranged on the top of the second support frame 20. The semiconductor adjustment fixing frame 211 and the semiconductor laser 212 are both existing equipment that are easy to purchase. The first support frame 210 provides an installation carrier for the semiconductor adjustment fixing frame 211 and the semiconductor laser 212, and the second support frame 20 provides a small hole light barrier 200 for limiting the light beam when the laser is emitted.

[0052] The first angular position adjustment module 30 includes a first X-direction translation adjustment platform 300, a first Y-direction translation adjustment platform 301, a first Z-direction translation adjustment platform 302, a first X-direction angular position platform 303, a first Y-direction angular position platform 304 and a first rotation adjustment platform 305. The first X-direction translation adjustment platform 300 is slidably arranged on the base 1 in the X direction, the first Y-direction translation adjustment platform 301 is slidably arranged on the top of the first X-direction translation adjustment platform 300 in the Y direction, the first Z-direction translation adjustment platform 302 is slidably arranged on the top of the first Y-direction translation adjustment platform 301 in the vertical direction, and the first X-direction angular position adjustment platform 303 is slidably arranged on the top of the first Y-direction translation adjustment platform 304. The platform 303 is rotatably arranged in the X direction on the top of the first Z direction translation adjustment platform 302, the first Y direction angle platform 304 is rotatably arranged in the Y direction on the top of the first X direction angle platform 303, and the first rotation adjustment platform 305 is rotatably arranged on the top of the first Y direction angle platform 304. The first X direction translation adjustment platform 300, the first Y direction translation adjustment platform 301, the first Z direction translation adjustment platform 302, the first X direction angle platform 303, the first Y direction angle platform 304 and the first rotation adjustment platform 305 can provide all-round adjustment for the third support frame 310, so as to adjust the position more accurately.

[0053] The camera adjustment module 31 includes a third support frame 310, a camera fixing substrate 311, a first flat glass 312, a first camera adjustment seat 313, a second camera adjustment seat 314, a primary camera 315, a secondary camera 316 and a computer 317. The third support frame 310 is fixedly arranged on the top of the first rotating adjustment platform 305 in a vertical state, the camera fixing substrate 311 is fixedly arranged on the top of the third support frame 310 in a vertical state, the first flat glass 312 is fixedly embedded in the bottom of the camera fixing substrate 311, the first camera adjustment seat 313 and the second camera adjustment seat 314 are both adjusted and arranged on the top of the camera fixing substrate 311, and the first camera adjustment seat 313 is located on the top of the second camera adjustment seat 314. The primary camera 315 and the secondary camera 316 are respectively fixedly arranged in a horizontal state on one side of the first camera adjustment seat 313 and the second camera adjustment seat 314, the computer 317 is arranged beside the primary camera 315 and the secondary camera 316, and the computer 317 is electrically connected to the primary camera 315 and the secondary camera 316, the first camera adjustment seat 313 and the second camera adjustment seat 314 can adjust the horizontal position of the primary camera 315 and the secondary camera 316 respectively, the computer 317 displays the images of the primary camera 315 and the secondary camera 316 in real time, and the camera fixing substrate 311 provides an installation carrier for the first flat glass 312, the first camera adjustment seat 313 and the second camera adjustment seat 314.

[0054] The second adjustment platform 4 includes a second X-direction angle platform 40, a second Y-direction angle platform 41, a second rotation adjustment platform 42, a fourth support frame 43 and a second flat glass 44. The second X-direction angle platform 40 is rotatably arranged on the base 1 in the X direction, the second Y-direction angle platform 41 is rotatably arranged on the top of the second X-direction angle platform 40 in the Y direction, the second rotation adjustment platform 42 is rotatably arranged on the top of the second Y-direction angle platform 41, the fourth support frame 43 is vertically fixedly arranged on the top of the second rotation adjustment platform 42, and the second flat glass 44 is vertically fixedly embedded in the top of the fourth support frame 43. The second X-direction angle platform 40, the second Y-direction angle platform 41 and the second rotation adjustment platform 42 can provide all-round adjustment for the fourth support frame 43, and the fourth support frame 43 provides a mounting carrier for the second flat glass 44. The third adjustment platform 5 includes a third X-direction angle platform 40, a second Y-direction angle platform 41 and a second rotation adjustment platform 42. Angle table 50, third Y-direction angle table 51, third rotation adjustment table 52, fifth support frame 53 and reflector 54, the third X-direction angle table 50 is rotatably arranged on the base 1 in the X direction, the third Y-direction angle table 51 is rotatably arranged on the top of the third X-direction angle table 50 in the Y direction, the third rotation adjustment table 52 is rotatably arranged on the top of the third Y-direction angle table 51, the fifth support frame 53 is fixedly arranged on the top of the third rotation adjustment table 52 in a vertical state, and the reflector 54 is fixedly installed on the top of the fifth support frame 53 in a vertical state. The third X-direction angle table 50, the third Y-direction angle table 51 and the third rotation adjustment table 52 provide full-angle adjustment for the fifth support frame 53 to make the adjustment more precise, the fifth support frame 53 provides a mounting carrier for the reflector 54, and the function of the reflector 54 is to reflect the light beam back to the exit point along the original path to achieve the purpose of adjustment and correction.

[0055] An operating method of a binocular camera optical axis calibration device for VR testing comprises the following steps:

[0056] Step 1: Through the adjustment of the device, the optical axes of the primary camera 315 and the secondary camera 316 can be parallel and perpendicular to the surface of the first flat glass 312, and the distance between the optical axes can be adjusted to a desired value.

[0057] By operating the camera adjustment module 31, the third support frame 310 is fixedly installed on the first rotation adjustment platform 305, and the first rotation adjustment platform 305 is operated to adjust the first X-direction angular platform 303, the first Y-direction angular platform 304, the first X-direction translation adjustment platform 300, the first Y-direction translation adjustment platform 301 and the first Z-direction translation adjustment platform 302 respectively by screws.

[0058] The second flat glass 44 is fixed on the second rotating adjustment platform 42 through the fourth support frame 43, and the second rotating adjustment platform 42 is adjusted to adjust the second X-direction angle platform 40 and the second Y-direction angle platform 41 respectively and fix them by screws.

[0059] The reflector 54 is fixed on the third rotation adjustment platform 52 through the fifth support frame 53, and the third rotation adjustment platform 52 is adjusted to adjust the third X-direction angle platform 50 and the third Y-direction angle platform 51 respectively and fix them by screws.

[0060] The semiconductor laser 212 is fixed in position by a semiconductor adjustment fixture 211 .

[0061] After the operation is completed, there are two cross lines on the second flat glass 44 with a center distance equal to the IPD of the VR binocular near-eye display module.

[0062] Step 2: Use semiconductor laser to make the camera fixing substrate 311, the first flat glass 312 and the reflective mirror 54 parallel and perpendicular to the semiconductor laser.

[0063] The semiconductor adjustment fixing frame 211 is adjusted to adjust the position of the laser. The camera fixed substrate 311 and the first flat glass 312 are adjusted by operating the first X-direction angle table 303, the first Y-direction angle table 304, the first X-direction translation adjustment table 300, the first Y-direction translation adjustment table 301, the first Z-direction translation adjustment table 302 and the first rotation adjustment table 305 of the first adjustment platform 3. The position of the reflector 54 is adjusted by the third X-direction angle table 50, the third Y-direction angle table 51 and the third rotation adjustment table 52 of the third adjustment platform 5, so that the reflected light beam of the laser on the second flat glass 44 on the camera fixed substrate 311, the first flat glass 312 and the reflector 54 returns to the exit point along the original path.

[0064] The center distance between the two cross lines of the second flat glass 44 is the IPD of the VR binocular near-eye display module.

[0065] The positions of the primary camera 315 and the secondary camera 316 are adjusted by adjusting the first camera adjustment seat 313 and the second camera adjustment seat 314 in the camera adjustment module 31, so that the midpoint of the cross line on the second glass plate is recorded as LR, and the midpoint of the cross line virtual image in the reflector 54 is recorded as L'R', which coincides with the midpoint of the camera LR image.

[0066] Step 3: Camera optical axis adjustment method.

[0067] A semiconductor laser 212 is used to make the laser beam emit through the pinhole light barrier 200, and a reflected light beam is generated on the surfaces of the first flat glass 312, the second flat glass 44 and the reflector 54. The rotation angle and the pitch angle of the reflector 54 are adjusted by the third rotation adjustment platform 52, the third X-direction angular position platform 50 and the third Y-direction angular position platform 51, so that the reflector 54 reflects the light beam back to the pinhole light barrier 200, and the laser beam is perpendicular to the surface of the reflector 54.

[0068] Similarly, adjust the second rotating adjustment table 42, the second X-direction angular table 40 and the second Y-direction angular table 41 to make the laser beam perpendicular to the surface of the second flat glass 44, and adjust the first rotating adjustment table 305, the second X-direction angular table 40 and the second Y-direction angular table 41 to make the laser beam perpendicular to the surface of the first flat glass 312.

[0069] Adjust the first camera adjustment seat 313, the midpoint on the second flat glass 44 is marked as 1, and the midpoint 1' of the image in the reflector 54 coincides with the midpoint 1 of the primary camera 315 image, and the straight line on the flat glass marked as H1H2 also coincides with the primary camera 315 image marked as H11H12.

[0070] Adjust the second camera adjustment base 314, the midpoint on the second flat glass 44 is marked as 2, and the midpoint 2' of the image in the reflector 54 coincides with the midpoint of the secondary camera 316 image, and the straight line on the flat glass is marked as H1H2 and also coincides with the secondary camera 316 image H21H22.

[0071] The line connecting the midpoints 1 and 2 of the pattern on the flat glass and the midpoints 1 and 2 of the image in the mirror is perpendicular to the reflector 54, so the optical axes of the adjusted cameras 1 and 2 are perpendicular to the reflector 54, that is, the optical axes of the primary camera 315 and the secondary camera 316 are parallel, and the distance between the optical axes is the set IPD value. The camera adjustment module 31 adjusted by this method can be used to evaluate the assembly tolerance of the VR binocular display module, adjust the center of the left and right eye display images, etc.

[0072] Working principle:

[0073] 1. By operating the camera adjustment module 31, the third support frame 310 is fixedly installed on the first rotation adjustment platform 305, and the first rotation adjustment platform 305 is operated to adjust the first X-direction angle platform 303, the first Y-direction angle platform 304, the first X-direction translation adjustment platform 300, the first Y-direction translation adjustment platform 301 and the first Z-direction translation adjustment platform 302 respectively through screws, and the second flat glass 44 is fixed on the second rotation adjustment platform 42 through the fourth support frame 43, and the second rotation adjustment platform 42 is adjusted, and the second X-direction angle platform 40 and the second Y-direction angle platform 41 are respectively adjusted and fixed through screws, and the reflector 54 is fixed on the third rotation adjustment platform 52 through the fifth support frame 53, and the third rotation adjustment platform 52 is adjusted, and the third X-direction angle platform 50 and the third Y-direction angle platform 51 are respectively adjusted and fixed through screws, and the semiconductor laser 212 is fixed in position through the semiconductor adjustment fixing frame 211.

[0074] 2. Adjust the semiconductor adjustment fixing frame 211 to adjust the position of the laser. Adjust the camera fixed substrate 311 and the first flat glass 312 by operating the first X-direction angle table 303, the first Y-direction angle table 304, the first X-direction translation adjustment table 300, the first Y-direction translation adjustment table 301, the first Z-direction translation adjustment table 302 and the first rotation adjustment table 305 of the first adjustment platform 3. Adjust the position of the reflector 54 by the third X-direction angle table 50, the third Y-direction angle table 51 and the third rotation adjustment table 52 of the third adjustment platform 5, so that the reflected light beam of the laser on the second flat glass 44 on the camera fixed substrate 311, the first flat glass 312 and the reflector 54 returns to the exit point along the original path.

[0075] 3. The rotation angle and the pitch angle of the reflector 54 are adjusted by the third rotation adjustment platform 52, the third X-direction angle platform 50 and the third Y-direction angle platform 51, so that the light beam reflected by the reflector 54 returns to the pinhole light barrier 200, and the laser beam is perpendicular to the surface of the reflector 54. Similarly, the second rotation adjustment platform 42, the second X-direction angle platform 40 and the second Y-direction angle platform 41 are adjusted so that the laser beam is perpendicular to the surface of the second flat glass 44. The first rotation adjustment platform 305, the second X-direction angle platform 40 and the second Y-direction angle platform 41 are adjusted so that the laser beam is perpendicular to the surface of the first flat glass 312. The first camera adjustment seat 313 is adjusted, and the midpoint on the second flat glass 44 is marked as 1, and the midpoint 1 of the image in the reflector 54 is marked as 2. ', coincides with the midpoint 1 of the image of the primary camera 315, and the straight line on the flat glass is recorded as H1H2 and also coincides with the image of the primary camera 315 recorded as H11H12, adjust the second camera adjustment seat 314, the midpoint on the second flat glass 44 is recorded as 2, the midpoint 2' of the image in the reflector 54 coincides with the midpoint of the image of the secondary camera 316, and the straight line on the flat glass is recorded as H1H2 and also coincides with the image of the secondary camera 316 H21H22, the line connecting the midpoint 1 of the pattern on the flat glass and the midpoint 1' and 2' of the image in the mirror 2 is perpendicular to the reflector 54, so the adjusted optical axes of the cameras 1 and 2 are perpendicular to the reflector 54, that is, the optical axes of the primary camera 315 and the secondary camera 316 are parallel, and the distance between the optical axes is the set IPD value.

Claims

1. An operating method for a binocular camera optical axis calibration device for VR testing, characterized in that: The calibration device comprises a base (1), a laser platform (2), a first adjustment platform (3), a second adjustment platform (4) and a third adjustment platform (5); the laser platform (2), the first adjustment platform (3), the second adjustment platform (4) and the third adjustment platform (5) are arranged on the base (1) in an array; the first adjustment platform (3) is arranged between the laser platform (2) and the second adjustment platform (4); and the second adjustment platform (4) is arranged between the first adjustment platform (3) and the third adjustment platform (5); the laser platform (2) comprises a second support frame (20) and a laser module (21); the second support frame (20) is vertically fixed on the base (1); the laser module (21) is fixed on the base (1) and is located beside the second support frame (20); the first adjustment platform (3) comprises a first angle adjustment module (30) and a camera adjustment module (31); the first angle adjustment module (30) is fixed on the base (1); and the camera adjustment module (31) is fixed on the top of the first angle adjustment module; The laser module (21) comprises a first support frame (210), a semiconductor adjustment fixing frame (211) and a semiconductor laser (212); the first support frame (210) is fixedly arranged on the base (1) and located beside the second support frame (20); the semiconductor adjustment fixing frame (211) is adjustably arranged on the top of the first support frame (210); and the semiconductor laser (212) is fixedly arranged on the semiconductor adjustment fixing frame (211); The first angular position adjustment module (30) comprises a first X-direction translation adjustment platform (300), a first Y-direction translation adjustment platform (301), a first Z-direction translation adjustment platform (302), a first X-direction angular position platform (303), a first Y-direction angular position platform (304) and a first rotation adjustment platform (305), wherein the first X-direction translation adjustment platform (300) is slidably arranged on the base (1) in the X direction, and the first Y-direction translation adjustment platform (301) is slidably arranged on the first X-direction translation adjustment platform (303) in the Y direction. The first Z-direction translation adjustment platform (302) is vertically slidably arranged on the top of the first Y-direction translation adjustment platform (301), the first X-direction angular position platform (303) is rotatably arranged on the top of the first Z-direction translation adjustment platform (302) in the X direction, the first Y-direction angular position platform (304) is rotatably arranged on the top of the first X-direction angular position platform (303) in the Y direction, and the first rotation adjustment platform (305) is rotatably arranged on the top of the first Y-direction angular position platform (304); The camera adjustment module (31) comprises a third support frame (310), a camera fixing substrate (311), a first flat glass (312), a first camera adjustment seat (313), a second camera adjustment seat (314), a primary camera (315), a secondary camera (316) and a computer (317); the third support frame (310) is fixedly arranged on the top of the first rotating adjustment platform (305) in a vertical state; the camera fixing substrate (311) is fixedly arranged on the top of the third support frame (310) in a vertical state. The first flat glass (312) is fixedly embedded in the bottom of the camera fixing substrate (311), the first camera adjustment seat (313) and the second camera adjustment seat (314) are both adjusted and arranged on the top of the camera fixing substrate (311), and the first camera adjustment seat (313) is located on the top of the second camera adjustment seat (314), and the first camera (315) and the second camera (316) are respectively fixedly arranged in a horizontal state on one side of the first camera adjustment seat (313) and the second camera adjustment seat (314); The second adjustment platform (4) comprises a second X-direction angle platform (40), a second Y-direction angle platform (41), a second rotation adjustment platform (42), a fourth support frame (43) and a second flat glass (44); the second X-direction angle platform (40) is rotatably arranged on the base (1) in the X direction; the second Y-direction angle platform (41) is rotatably arranged on the top of the second X-direction angle platform (40) in the Y direction; the second rotation adjustment platform (42) is rotatably arranged on the top of the second Y-direction angle platform (41); the fourth support frame (43) is fixedly arranged on the top of the second rotation adjustment platform (42) in a vertical state; and the second flat glass (44) is fixedly embedded in the top of the fourth support frame (43) in a vertical state; The third adjustment platform (5) comprises a third X-direction angular platform (50), a third Y-direction angular platform (51), a third rotation adjustment platform (52), a fifth support frame (53) and a reflector (54); the third X-direction angular platform (50) is rotatably arranged on the base (1) in the X direction; the third Y-direction angular platform (51) is rotatably arranged on the top of the third X-direction angular platform (50) in the Y direction; the third rotation adjustment platform (52) is rotatably arranged on the top of the third Y-direction angular platform (51); the fifth support frame (53) is fixedly arranged on the top of the third rotation adjustment platform (52) in a vertical state; and the reflector (54) is fixedly installed on the top of the fifth support frame (53) in a vertical state; An operating method of a binocular camera optical axis calibration device for VR testing comprises the following steps: Step 1: Through the adjustment of the device, the optical axes of the primary camera (315) and the secondary camera (316) can be parallel and perpendicular to the surface of the first flat glass (312), and the distance between the optical axes can be adjusted to a desired value; By operating the camera adjustment module (31), the third support frame (310) is fixedly mounted on the first rotation adjustment platform (305), and the first rotation adjustment platform (305) is operated to respectively adjust the first X-direction angle platform (303), the first Y-direction angle platform (304), the first X-direction translation adjustment platform (300), the first Y-direction translation adjustment platform (301) and the first Z-direction translation adjustment platform (302) by screws; Fixing the second flat glass (44) on the second rotating adjustment platform (42) via the fourth support frame (43), adjusting the second rotating adjustment platform (42), respectively adjusting the second X-direction angular platform (40) and the second Y-direction angular platform (41) and fixing them via screws; Fixing the reflector (54) on the third rotation adjustment platform (52) via the fifth support frame (53), adjusting the third rotation adjustment platform (52), respectively adjusting the third X-direction angular platform (50) and the third Y-direction angular platform (51) and fixing them via screws; The semiconductor laser (212) is fixed in position by means of a semiconductor adjustment fixing frame (211); after the operation is completed, two cross lines are formed on the second flat glass (44) with a center distance equal to the IPD of the VR binocular near-eye display module; Step 2: adjusting the semiconductor laser, the camera fixing substrate (311), the first flat glass (312), and the reflector (54) so ​​that the camera fixing substrate (311), the first flat glass (312), and the reflector (54) are parallel and perpendicular to the semiconductor laser; The semiconductor adjustment fixing frame (211) is adjusted to adjust the position of the laser, and the camera fixing substrate (311) and the first flat glass (312) are adjusted by operating the first X-direction angle table (303), the first Y-direction angle table (304), the first X-direction translation adjustment table (300), the first Y-direction translation adjustment table (301), the first Z-direction translation adjustment table (302) and the first rotation adjustment table (305) of the first adjustment platform (3), and the position of the reflector (54) is adjusted by the third X-direction angle table (50), the third Y-direction angle table (51) and the third rotation adjustment table (52) of the third adjustment platform (5), so that the reflected light beam of the laser on the second flat glass (44), the first flat glass (312) and the reflector (54) on the camera fixing substrate (311) returns to the exit point along the original path; The center distance between the two cross lines of the second flat glass (44) is the IPD of the VR binocular near-eye display module; By adjusting the first camera adjustment seat (313) and the second camera adjustment seat (314) in the camera adjustment module (31), the positions of the primary camera (315) and the secondary camera (316) are adjusted so that the midpoint of the cross line on the second glass plate, which is recorded as LR, and the midpoint of the virtual image of the cross line in the reflector (54), which is recorded as L'R', coincide with the midpoint of the camera LR image; Step 3: Camera optical axis adjustment method; A semiconductor laser (212) is used to emit a laser beam through a pinhole light barrier, and a reflected light beam is generated on the surfaces of a first flat glass (312), a second flat glass (44) and a reflector (54); a rotation angle and a pitch angle of the reflector (54) are adjusted by a third rotation adjustment platform (52), a third X-direction angle platform (50) and a third Y-direction angle platform (51) so that the reflected light beam of the reflector (54) returns to the pinhole light barrier, and the laser beam is perpendicular to the surface of the reflector (54); Similarly, the second rotating adjustment platform (42), the second X-direction angular platform (40) and the second Y-direction angular platform (41) are adjusted so that the laser beam is perpendicular to the surface of the second flat glass (44), and the first rotating adjustment platform (305), the second X-direction angular platform (40) and the second Y-direction angular platform (41) are adjusted so that the laser beam is perpendicular to the surface of the first flat glass (312); The first camera adjustment seat (313) is adjusted, the midpoint on the second flat glass (44) is marked as 1, the midpoint 1' of the image in the reflector (54) coincides with the midpoint 1 of the image of the primary camera (315), and the straight line on the flat glass is marked as H1H2 and coincides with the image of the primary camera (315) as marked as H11H12; The second camera adjustment seat (314) is adjusted, the midpoint on the second flat glass (44) is marked as 2, the midpoint 2' of the image in the reflector (54) coincides with the midpoint of the image of the secondary camera (316), and the straight line on the flat glass is marked as H1H2 and also coincides with the image H21H22 of the secondary camera (316); The line connecting the midpoints 1 and 2 of the image on the flat glass and the midpoints 1' and 2' of the image in the mirror is perpendicular to the reflector (54), so the optical axes of the adjusted cameras 1 and 2 are perpendicular to the reflector (54), that is, the optical axes of the primary camera (315) and the secondary camera (316) are parallel, and the distance between the optical axes is the set IPD value. The camera adjustment module (31) adjusted by this method can be used to evaluate the assembly tolerance of the VR binocular display module and adjust the center of the left and right eye display images.

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