VR head-mounted display optical calibration jig

Abstract

The invention discloses a VR head-mounted display optical calibration jig, and relates to the technical field of calibration test jigs, the VR head-mounted display optical calibration jig comprises a base, a head-mounted display limiting assembly and a shooting assembly; the head-mounted display limiting assembly is detachably mounted on the base, the head-mounted display limiting assembly comprises a first limiting module and a second limiting module, and the first limiting module and the second limiting module enclose to form a mounting space for accommodating a VR head-mounted display; the shooting assembly comprises a camera module, the camera module is movably connected to the base and located in the installation space, and the camera module faces the first limiting module to shoot the VR head-mounted display.

Description

Technical Field

[0001] The present invention relates to the technical field of calibration test fixtures, and in particular to an optical calibration fixture for a VR head display. Background Art

[0002] The VR headset optical measurement and calibration test fixture is a component used to test the optical lenses and 6DOF and 3DOF camera spatial position calibration in VR headset products, thereby facilitating product positioning and conducting different modes of testing, including imaging quality inspection of the optical lenses in the headset and calibration testing of the spatial position accuracy of the 6DOF and 3DOF cameras. However, the existing calibration test fixtures still have the following problems: During the inspection of the imaging quality of the optical lenses in the VR headset and the calibration testing of the spatial position accuracy of the 6DOF and 3DOF cameras, the clamping needs to be adjusted according to different headset products, and the clamping operation is inconvenient and needs to be disassembled later. Summary of the Invention

[0003] The main purpose of this invention is to propose a VR head-mounted display optical calibration fixture, aiming to improve the applicability of the VR head-mounted display optical calibration fixture to different types of VR head-mounted display products.

[0004] To achieve the above objectives, the present invention proposes a VR head-mounted display optical calibration fixture, comprising:

[0005] base;

[0006] A head-mounted display (HMD) limiting assembly, the HMD limiting assembly being detachably mounted on the base, the HMD limiting assembly comprising a first limiting module and a second limiting module, the first limiting module and the second limiting module enclosing and forming an installation space for accommodating a VR HMD;

[0007] The shooting component includes a camera module, which is movably connected to the base and located in the installation space. The camera module faces the first limiting module to shoot the VR headset.

[0008] In one embodiment, the first limiting module includes a first mounting seat, a mainframe support block, a nose pad support block, a first left limiting block and a first right limiting block. The mainframe support block, the nose pad support block, the first left limiting block and the first right limiting block are arranged on the first mounting seat. The mainframe support block and the nose pad support block are located in the middle position in the length direction of the first mounting seat. The first left limiting block and the first right limiting block are respectively arranged on both sides of the mainframe support block to respectively abut and limit the two sides of the front end body of the VR headset.

[0009] In one embodiment, the first limiting module further includes a top pressure block and a pressure block support frame, the pressure block support frame is installed on the base, the pressure block is connected to the pressure block support frame and is located above the host support block, and the top pressure block abuts against the top end of the front end body of the VR headset to limit the position.

[0010] In one embodiment, the second limiting module includes a second mounting seat, a second left limiting block, a second middle limiting block and a second right limiting block, the second left limiting block, the second middle limiting block and the second right limiting block are installed on the second mounting seat, the second left limiting block and the second right limiting block are respectively arranged at opposite ends of the length direction of the second mounting seat, and the second middle limiting block is located between the second left limiting block and the second right limiting block and is arranged facing both of them.

[0011] In one embodiment, the second left limit block, the second middle limit block and the second right limit block all include a limit member and a pressing member, the limit member is provided on the second mounting seat, the pressing member is provided above the limit member, the limit member forms a limit surface on the side facing the VR head display, the limit surface abuts against the side walls on the inner and outer sides of the VR head display, the pressing member includes a connecting part and a pressing part, the connecting part is detachably connected to the limit member and can be raised and lowered relative to the limit member, and the bottom of the pressing part abuts against the top of the VR head display for limitation.

[0012] In one embodiment, the base is formed with a first mounting groove, which extends along the width direction of the base. The second mounting seat is installed in the first mounting groove and can be adjusted along the extension direction of the mounting groove to make the second limiting module close to or away from the first limiting module.

[0013] In one embodiment, the shooting assembly also includes a sliding module and a connecting seat, the sliding module includes a first slide rail, a second slide rail and a third slide rail, the first slide rail is connected to the base and extends along the width direction of the base, the second slide rail is slidably installed on the first slide rail and extends along the length direction of the base, the third slide rail is installed on the second slide rail in the vertical direction, the connecting seat is slidably connected to the third slide rail, and the camera module is installed on the connecting seat.

[0014] In one embodiment, the shooting assembly includes two groups, and the two shooting assemblies are spaced apart and arranged in the installation space.

[0015] In one embodiment, a buffer protection layer is connected to a side of each limit block facing the VR head display.

[0016] In one embodiment, the VR head-mounted display optical calibration fixture further includes a calibration camera assembly, the calibration camera assembly includes a calibration camera and a mounting bracket, the camera is connected to the mounting bracket, the base is formed with a second mounting groove, the second mounting groove extends along the width direction of the base, the mounting bracket is installed in the second mounting groove, and can be movably adjusted along the extension direction of the second mounting groove to make the calibration camera close to or away from the head-mounted display limiting assembly.

[0017] The technical solution of the present invention proposes a VR headset optical calibration jig, which includes a base, a headset limiting assembly and a shooting assembly. The base serves as a supporting structure to ensure the stability of the entire jig; the headset limiting assembly is enclosed by a first limiting module and a second limiting module to form an installation space, ensuring that the VR headset is stably fixed during the calibration process; the camera module of the shooting assembly can be movably connected to the base to provide flexible shooting angle and position adjustment. This design not only ensures the stability of the VR headset, but also improves the accuracy and efficiency of the calibration through the flexible shooting assembly. The headset limiting assembly achieves multi-dimensional fixation of the VR headset through the first limiting module and the second limiting module, ensuring that the displacement of the VR headset in the horizontal, longitudinal and vertical directions is effectively limited. The movable connection design of the shooting assembly allows the camera module to move in different directions on the base to adapt to VR headsets of different sizes or different shooting requirements, thereby optimizing the efficiency and accuracy of the calibration process. In addition, the detachable VR headset optical calibration fixture enables users to customize the modular requirements of the fixture to meet the specifications according to the product form requirements, providing a more personalized and accurate fixture. This improves the flexibility of the VR headset optical calibration fixture in testing products, reduces the frequency of equipment updates, and helps reduce the generation of electronic waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of an embodiment of the VR head-mounted display optical calibration fixture provided by the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the VR head-mounted display optical calibration fixture from another perspective;

[0021] Figure 3 for Figure 1 Bottom view of the VR headset optical calibration fixture;

[0022] Figure 4 Schematic diagram of the structure of the VR headset installed on the VR headset optical calibration fixture;

[0023] Figure 5 for Figure 4 A structural diagram from another perspective.

[0024] Description of Figure Numbers:

[0025] 100. VR head-mounted display optical calibration fixture; 1. Base; 11. First mounting slot; 12. Second mounting slot; 2. Head-mounted display limiter assembly; 21. First limiter module; 211. First mounting seat; 212. Host support block; 213. Nose pad support block; 214. First left limiter block; 215. First right limiter block; 216. Top pressure block; 217. Pressure block support frame; 22. Second limiter module; 221. Second mounting seat; 222. Second left limiter Position block; 223, second middle limit block; 224, second right limit block; 2241, limit member; 2242, pressing member; 2242a, connecting part; 2242b, pressing part; 3, shooting assembly; 31, camera module; 32, sliding module; 321, first slide rail; 322, second slide rail; 323, third slide rail; 33, connecting seat; 4, calibration camera assembly; 41, calibration camera; 42, mounting bracket; 200, VR headset.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The VR headset optical measurement and calibration test fixture is a component used to test the optical lenses and 6DOF and 3DOF camera spatial position calibration in VR headset products, thereby facilitating product positioning and conducting different modes of testing, including imaging quality inspection of the optical lenses in the headset and calibration testing of the spatial position accuracy of the 6DOF and 3DOF cameras. However, the existing calibration test fixtures still have the following problems: During the inspection of the imaging quality of the optical lenses in the VR headset and the calibration testing of the spatial position accuracy of the 6DOF and 3DOF cameras, the clamping needs to be adjusted according to different headset products, and the clamping operation is inconvenient and needs to be disassembled later.

[0031] To solve the above problems, please refer to Figures 1 to 5 The present invention proposes a VR head-mounted display optical calibration fixture 100, including a base 1, a head-mounted display limiting component 2 and a shooting component 3; the head-mounted display limiting component 2 is detachably mounted on the base 1, and the head-mounted display limiting component 2 includes a first limiting module 21 and a second limiting module 22, and the first limiting module 21 and the second limiting module 22 enclose an installation space for accommodating a VR head-mounted display 200; the shooting component 3 includes a camera module 31, which is movably connected to the base 1 and is located in the installation space, and the camera module 31 faces the first limiting module 21 to shoot the VR head-mounted display 200.

[0032] The technical solution of the present invention proposes a VR headset optical calibration jig 100, which includes a base 1, a headset limiting assembly 2 and a shooting assembly 3. The base 1 serves as a supporting structure to ensure the stability of the entire jig; the headset limiting assembly 2 is enclosed by a first limiting module 21 and a second limiting module 22 to form an installation space, ensuring that the VR headset 200 is stably fixed during the calibration process; the camera module 31 of the shooting assembly 3 can be movably connected to the base 1 to provide flexible shooting angle and position adjustment. This design not only ensures the stability of the VR headset 200, but also improves the accuracy and efficiency of the calibration through the flexible shooting assembly 3. The headset limiting assembly 2 achieves multi-dimensional fixation of the VR headset 200 through the first limiting module 21 and the second limiting module 22, ensuring that the displacement of the VR headset 200 in the horizontal, longitudinal and vertical directions is effectively limited. The movable connection design of the camera assembly 3 allows the camera module 31 to move in different directions on the base 1 to accommodate VR headsets 200 of different sizes or different shooting requirements, thereby optimizing the efficiency and accuracy of the calibration process. Furthermore, the detachable VR headset optical calibration jig 100 enables users to customize the jig modular requirements to meet product specifications based on the form factor, providing a more personalized and accurate jig. This increases the flexibility of the VR headset optical calibration jig 100 in testing products, reduces the frequency of equipment updates, and helps reduce the generation of electronic waste.

[0033] In an optional embodiment, to improve the stability of the VR head display 200, please refer to Figure 1 and Figure 2The first limiting module 21 includes a first mounting seat 211, a mainframe support block 212, a nose pad support block 213, a first left limiting block 214 and a first right limiting block 215. The mainframe support block 212, the nose pad support block 213, the first left limiting block 214 and the first right limiting block 215 are arranged on the first mounting seat 211. The mainframe support block 212 and the nose pad support block 213 are located in the middle position in the length direction of the first mounting seat 211. The first left limiting block 214 and the first right limiting block 215 are respectively arranged on both sides of the mainframe support block 212 to respectively abut and limit the two sides of the front end body of the VR headset 200. The main unit support block 212 and nose pad support block 213 are located in the center, providing primary support for the front body and nose pad area of the VR headset 200, respectively. A first left stopper 214 and a first right stopper 215 are located on either side, abutting and limiting the front body of the VR headset 200 to prevent lateral displacement of the VR headset 200. This multi-point support and limiting design ensures precise centering and stability of the VR headset 200 within the installation space. The shape and size of the main unit support block 212 must match the main body of the headset to provide uniform support, while the nose pad support block 213 must take into account the curved shape of the nose pad to ensure fit and stability. The left and right stoppers precisely align with specific locations on the sidewalls of the VR headset 200, ensuring stable and accurate abutment. This design not only improves the stability of the VR headset 200 but also optimizes space utilization through a rational layout, allowing the VR headset optical calibration jig 100 to accommodate VR headsets 200 of varying sizes.

[0034] In an optional embodiment, to further improve the stability of the VR head display 200 installation, please refer to Figure 1 and Figure 2The first limiting module 21 also includes a top pressure block 216 and a pressure block support frame 217. The pressure block support frame 217 is mounted on the base 1. The pressure block is connected to the pressure block support frame 217 and is located above the host support block 212. The top pressure block 216 abuts against the top of the front body of the VR headset 200 to limit its position. This design not only improves the vertical stability of the VR headset 200, but also adapts to VR headsets 200 of different heights through the adjustable pressure block support frame 217. The shape and size of the top pressure block 216 match the curvature of the VR headset top to provide uniform support while avoiding excessive pressure or deformation on the VR headset 200. The design of the pressure block support frame 217 ensures its stability and adjustability, and can adopt a liftable structure to accommodate VR headsets 200 of different heights. The top pressure block 216 works in conjunction with the left and right limiting blocks and support blocks to achieve three-dimensional fixation, ensuring the stability of the VR headset 200 during the calibration process. This multi-dimensional fixing method not only improves the stability of the VR headset 200, but also reduces the pressure concentration on the structure of the VR headset 200 through reasonable force distribution, thereby reducing the risk of deformation of the VR headset 200 during the fixing process.

[0035] In an optional embodiment, to improve the stability of the rear end structure of the VR head display 200, please refer to Figure 1 and Figure 2 The second limiting module 22 includes a second mounting base 221, a second left limiting block 222, a second middle limiting block 223, and a second right limiting block 224. The second left limiting block 222, the second middle limiting block 223, and the second right limiting block 224 are mounted on the second mounting base 221. The second left limiting block 222 and the second right limiting block 224 are located at opposite ends of the second mounting base 221 in the longitudinal direction. The second middle limiting block 223 is located between the second left limiting block 222 and the second right limiting block 224 and faces both. This multi-point limiting design ensures that the VR headset 200 is fully fixed within the installation space. The shapes of the second left limiting block 222, the second middle limiting block 223, and the second right limiting block 224 match the curvature of the side wall of the rear end body of the VR headset 200 to ensure stable and accurate abutment. The second left stopper 222, the second middle stopper 223, and the second right stopper 224 respectively abut and limit the VR headset 200 from both the inside and outside, further improving the stability of the VR headset 200. Furthermore, the second middle stopper 223, through its central abutment and limit position, also ensures that the VR headset 200 is precisely aligned within the installation space. This design not only improves the stability of the VR headset 200 but also optimizes the fixing effect of the VR headset optical calibration jig 100 by rationally distributing the limit points, making it suitable for headsets of different shapes and sizes.

[0036] In an alternative embodiment, please refer to Figure 1and Figure 2 The second left limiting block 222, the second middle limiting block 223, and the second right limiting block 224 each include a limiting member 2241 and a pressing member 2242. The limiting member 2241 is disposed on the second mounting seat 221, and the pressing member 2242 is disposed above the limiting member 2241. The limiting member 2241 forms a limiting surface on the side facing the VR headset 200, which abuts against the inner and outer sidewalls of the VR headset 200. The pressing member 2242 includes a connecting portion 2242a and a pressing portion 2242b. The connecting portion 2242a is detachably connected to the limiting member 2241 and can be raised and lowered relative to the limiting member 2241. The bottom of the pressing portion 2242b abuts against the top of the VR headset 200 to limit the position. The synergistic action of the limiting surface and the pressing portion 2242b ensures the stability of the VR headset 200 in both the horizontal and vertical directions. The shape and size of the limiting member 2241 match the curvature of the side wall of the VR headset 200 to ensure the stability and accuracy of the abutment. The pressing member 2242 extends downward toward the side close to the VR headset 200 and bends to form a pressing portion 2242b to limit the rear end structure of the VR headset 200 in the up and down directions. The detachable connection and lifting adjustment function of the pressing member 2242 enable the VR headset optical calibration jig 100 to adapt to VR headsets 200 of different sizes and shapes. Optionally, the pressing member 2242 can be screwed to achieve a detachable lifting connection with the limiting member 2241. This design not only improves the fixing effect of the VR headset 200, but also reduces the pressure concentration on the VR headset 200 through reasonable force distribution, reducing the risk of deformation of the VR headset 200 during the fixing process.

[0037] In an optional embodiment, to facilitate the adjustment of the second limiting module 22, please refer to Figure 1 and Figure 3The base 1 is formed with a first mounting groove 11, which extends along the width direction of the base 1. The second mounting seat 221 is mounted on the first mounting groove 11 and can be adjusted along the extension direction of the mounting groove to move the second limiting module 22 closer to or farther away from the first limiting module 21. This design not only improves the versatility of the VR head display optical calibration fixture 100 and adapts to VR head displays 200 of different sizes, but also optimizes the fixing effect of the VR head display 200 through precise spacing control. The size of the first mounting groove 11 matches the size of the mounting seat to ensure that the second mounting seat 221 can move smoothly within the groove while avoiding shaking caused by excessive clearance. In this embodiment, a column structure is provided at the bottom of the second mounting seat 221. A connecting structure such as a bolt is used to pass through the first mounting groove 11 from the bottom of the base 1 and is connected to the column structure and locked. When the position needs to be adjusted, it is only necessary to loosen the bolt and push the second mounting seat 221 to adjust it back and forth within the first mounting groove 11. In other embodiments, a slider or a slide plate can be provided in the first mounting groove 11, and fixed to the base 1 by fasteners such as bolts to prevent the VR head display optical calibration fixture 100 from moving during testing and affecting the test results. The second mounting seat 221 can be connected to the slider or the slide plate to achieve the movable adjustment of the second limiting module 22. A similar fixing effect can also be achieved, and the specific selection can be made according to actual needs. The adjustability of the second mounting seat 221 improves the versatility and flexibility of the VR head display optical calibration fixture 100. This spacing adjustment function helps to adapt to VR head displays 200 of different sizes. For example, when a smaller VR head display 200 needs to be calibrated, the limiting modules can be moved closer to reduce the installation space; for a larger VR head display 200, the limiting modules can be moved away to expand the installation space, thereby improving the practicality of the VR head display optical calibration fixture 100.

[0038] In an optional embodiment, to achieve the activity adjustment of the camera assembly, please refer to Figure 2 、 Figure 4 as well as Figure 5The shooting assembly 3 also includes a sliding module 32 and a connecting seat 33. The sliding module 32 includes a first slide rail 321, a second slide rail 322 and a third slide rail 323. The first slide rail 321 is connected to the base 1 and extends along the width direction of the base 1. The second slide rail 322 is slidably installed on the first slide rail 321 and extends along the length direction of the base 1. The third slide rail 323 is installed on the second slide rail 322 in the vertical direction. The connecting seat 33 is slidably connected to the third slide rail 323, and the camera module 31 is installed on the connecting seat 33. This design allows the camera module 31 to move flexibly in the horizontal and vertical directions to ensure the accuracy of the shooting angle and position. The lengths of the first slide rail 321 and the second slide rail 322 can be designed according to the actual size of the VR head display optical calibration fixture 100 and the shooting requirements to ensure that the camera module 31 can move in the horizontal direction. The third slide rail 323 extends in the vertical direction to facilitate the lifting and lowering adjustment of the camera module 31. The connection base 33 provides a stable mounting base for the camera module 31 on the third slide rail 323. In this embodiment, the camera module 31 is located within the wearing space of the VR headset 200 and is positioned facing the lens. The camera module 31 is manually adjusted horizontally, vertically, and vertically on the base 1 by sliding a knob. When measuring the optical module in the VR headset 200, if the optical pupil distance of different models is encountered, the adjustment knob can be adjusted left and right to adapt to the measurement range of the different pupil distances. When the EyeBox (referring to the conical area between the near-eye display optical module and the eyeball) size of the optical lens of different models is encountered, the adjustment knob of the camera module 31 can be adjusted up and down to adapt to the measurement range of the EyeBox size of the lens of different specifications. When measuring the entrance pupil distance of different optical lenses of the optical module in the VR headset 200, the front-to-back distance between the camera module 31 and the optical lens can be adjusted by sliding the knob back and forth to achieve the actual measurement data of the entrance pupil distance of the optical lens. In other embodiments, automatic adjustment can also be achieved by providing a driving member such as a cylinder or a motor on the first slide rail 321 and the second slide rail 322. The specific selection can be made according to actual needs. This multi-dimensional adjustment function not only improves the flexibility of shooting, but also optimizes the efficiency of the calibration process, adapting to VR headsets 200 of different sizes and shapes. Furthermore, the shooting component 3 includes two groups, and the two shooting components 3 are spaced apart in the installation space. The two groups of shooting components 3 can respectively shoot and process the left and right lenses of the VR headset 200, thereby improving the efficiency of detection and calibration.

[0039] In an optional embodiment, each stopper is connected to a buffering protective layer on the side facing the VR headset 200. By connecting the buffering protective layer to the side of the stopper facing the VR headset 200, direct contact between the stopper and the VR headset 200 is reduced. The buffering protective layer is made of a soft material, effectively reducing the impact of friction and collision on the headset surface, thereby extending the service life of the VR headset 200. The material selection for the buffering protective layer should take into account its softness and wear resistance. For example, silicone, rubber, or other similar soft materials can be used. These materials not only have good cushioning properties but also provide a certain grip to ensure the effective fixation of each stopper. The thickness of the buffering protective layer needs to be adjusted according to the material and surface treatment of the VR headset 200 to avoid unstable fixation caused by an excessively thick buffer layer. This design not only helps protect the optical performance and appearance integrity of the VR headset 200, but also improves the accuracy of calibration data by reducing surface damage, enabling evenly distributed pressure and preventing damage to the VR headset 200 surface caused by excessive local pressure.

[0040] In an alternative embodiment, please refer to Figure 4 and Figure 5 The VR headset optical calibration jig 100 also includes a calibration camera assembly 4, which includes a calibration camera 41 and a mounting bracket 42. The camera is connected to the mounting bracket 42. The base 1 is formed with a second mounting slot 12, which extends along the width of the base 1. The mounting bracket 42 is mounted in the second mounting slot 12 and can be adjusted along the extension direction of the second mounting slot 12 to move the calibration camera 41 closer to or further away from the headset limit assembly 2. The arrangement of the calibration camera 41 facilitates basic positioning of the VR headset 200 for testing in different modes. Moreover, in this solution, the first limit module 21 is fixedly connected to the base 1, which facilitates maintaining a fixed installation reference when installing and placing the VR headset 200. By adjusting the second limit module 22, VR headsets of different sizes and types can be installed, which helps to improve the convenience of installing the VR headset 200 and the accuracy of the VR headset optical calibration jig 100, thereby achieving better calibration testing results. The length of the mounting slot is designed based on the actual size of the fixture and calibration requirements to ensure that the calibration camera 41 can move horizontally. The adjustability of the mounting bracket 42 can be achieved through a bolt structure, thereby improving the versatility and flexibility of the VR headset optical calibration fixture 100. This not only helps to improve the accuracy of calibration, but also optimizes the adaptability and efficiency of the VR headset optical calibration fixture 100 through flexible adjustment functions, allowing operators to quickly adjust the position of the calibration camera 41 to obtain the best calibration results.

[0041] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A VR head-mounted display optical calibration fixture, characterized in that: include: base; A head-mounted display (HMD) limiting assembly, the HMD limiting assembly being detachably mounted on the base, the HMD limiting assembly comprising a first limiting module and a second limiting module, the first limiting module and the second limiting module enclosing and forming an installation space for accommodating a VR HMD; The shooting component includes a camera module, which is movably connected to the base and located in the installation space. The camera module faces the first limiting module to shoot the VR headset.

2. The VR head-mounted display optical calibration fixture according to claim 1, wherein: The first limiting module includes a first mounting seat, a mainframe support block, a nose pad support block, a first left limiting block and a first right limiting block. The mainframe support block, the nose pad support block, the first left limiting block and the first right limiting block are arranged on the first mounting seat. The mainframe support block and the nose pad support block are located in the middle position in the length direction of the first mounting seat. The first left limiting block and the first right limiting block are respectively arranged on both sides of the mainframe support block to respectively abut and limit the two sides of the front end body of the VR headset.

3. The VR head-mounted display optical calibration fixture according to claim 2, wherein: The first limiting module also includes a top pressure block and a pressure block support frame. The pressure block support frame is installed on the base. The pressure block is connected to the pressure block support frame and is located above the host support block. The top pressure block abuts against the top of the front end body of the VR headset to limit the position.

4. The VR head-mounted display optical calibration fixture according to claim 3, wherein: The second limiting module includes a second mounting seat, a second left limiting block, a second middle limiting block and a second right limiting block. The second left limiting block, the second middle limiting block and the second right limiting block are installed on the second mounting seat. The second left limiting block and the second right limiting block are respectively arranged at opposite ends of the length direction of the second mounting seat. The second middle limiting block is located between the second left limiting block and the second right limiting block and is arranged facing both of them.

5. The VR head-mounted display optical calibration fixture according to claim 4, wherein: The second left limit block, the second middle limit block and the second right limit block all include a limit member and a pressing member. The limit member is arranged on the second mounting seat, and the pressing member is arranged above the limit member. The limit member forms a limit surface on the side facing the VR head display, and the limit surface abuts against the side walls on the inner and outer sides of the VR head display. The pressing member includes a connecting part and a pressing part. The connecting part is detachably connected to the limit member and can be raised and lowered relative to the limit member. The bottom of the pressing part abuts against the top of the VR head display for limitation.

6. The VR head display optical calibration fixture according to claim 4, wherein: The base is formed with a first mounting groove, which extends along the width direction of the base. The second mounting seat is installed in the first mounting groove and can be adjusted along the extension direction of the mounting groove to make the second limiting module close to or away from the first limiting module.

7. The VR head display optical calibration fixture according to any one of claims 1 to 6, characterized in that: The shooting assembly also includes a sliding module and a connecting seat. The sliding module includes a first slide rail, a second slide rail and a third slide rail. The first slide rail is connected to the base and extends along the width direction of the base. The second slide rail is slidably installed on the first slide rail and extends along the length direction of the base. The third slide rail is installed on the second slide rail in the vertical direction. The connecting seat is slidably connected to the third slide rail, and the camera module is installed on the connecting seat.

8. The VR head-mounted display optical calibration fixture according to claim 7, wherein: The shooting components include two groups, and the two shooting components are spaced apart and arranged in the installation space.

9. The VR head-mounted display optical calibration fixture according to claim 8, wherein: A buffer protection layer is connected to the side of each limit block facing the VR head display.

10. The VR head-mounted display optical calibration fixture according to claim 9, wherein: The VR head-mounted display optical calibration fixture also includes a calibration camera assembly, which includes a calibration camera and a mounting bracket. The camera is connected to the mounting bracket. The base is formed with a second mounting groove, which extends along the width direction of the base. The mounting bracket is installed in the second mounting groove and can be movably adjusted along the extension direction of the second mounting groove to make the calibration camera close to or away from the head-mounted display limit assembly.

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