Positioning jig for assisting in testing of an ar imaging detection device

Abstract

The utility model provides a kind of positioning fixture for assisting AR imaging detection equipment test, including base, support frame, first moving part, second moving part, grating waveguide carrier component, first attitude detection component and control component.The bottom end of support frame is fixedly arranged on base, and the top end of support frame is fixedly arranged first attitude detection component and sets up the fixed point position of AR imaging detection equipment.The bottom end of first moving part is fixedly arranged on base, the bottom end of second moving part is connected with the top end of first moving part, the top end of second moving part is connected with the bottom end of grating waveguide carrier component, and the top end of grating waveguide carrier component is used to place the grating waveguide to be measured.Control component is electrically connected with first attitude detection component, first moving part and second moving part.The positioning fixture for assisting AR imaging detection equipment test can enable AR imaging detection equipment to quickly and accurately determine the eyebox coordinate point position of grating waveguide to be measured for testing.

Description

Technical Field

[0001] This utility model belongs to the field of AR imaging testing technology, specifically relating to a positioning fixture for assisting in the testing of AR imaging detection equipment. Background Technology

[0002] Augmented Reality (AR) technology refers to providing users with additional information in the real world through certain technical means (i.e., "enhancement"). This technology organically integrates images from the virtual world with scenes from the real world, providing users with richer information and an immersive experience by deeply integrating the calculated information with the real world.

[0003] Augmented reality (AR) technology can be implemented through many hardware platforms, among which wearable AR devices, i.e., AR glasses, offer the most immersive experience. This type of hardware is a simple pair of glasses that guides light into the eye through microstructures on the lens surface. This hardware implementation is the most convenient and efficient, and is the mainstream technology for AR. The purpose of AR glasses lenses is to guide images from the imaging device into the eye through the lenses. Grating waveguides are a mainstream technology solution. A grating waveguide includes a waveguide substrate, a coupling grating, and a coupling grating. The coupling grating and coupling grating are set on the waveguide substrate. Its basic principle is as follows: Figure 1 As shown, the light output from the optomechanical system 1 (imaging device) is coupled into the waveguide substrate 2 by the coupling grating 3. It propagates in the waveguide substrate 2 by total internal reflection. Whenever it encounters the coupling grating 4, a portion of the light is coupled out. The coupled light (the solid line in the direction of the light entering the human eye in the figure) enters the human eye through the eye box, so that the same image as the output of the optomechanical system 1 can be seen. At the same time, the human eye can see the real world scene (the dashed line in the direction of the light entering the human eye in the figure). The superposition of the two parts can realize the function of augmented reality.

[0004] To improve the wearing experience of AR glasses, the grating waveguide needs to undergo luminous efficacy testing of the output image within the eye box area using AR imaging detection equipment during the manufacturing process. This testing requires precise relative positioning between the AR imaging detection equipment and the measured coordinate points within the eye box of the grating waveguide. Existing positioning methods are cumbersome and lack high accuracy. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a positioning fixture for assisting in the testing of AR imaging detection equipment.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a positioning fixture for assisting in the testing of AR imaging detection equipment, including a base, a support frame, a first moving component, a second moving component, a grating waveguide stage component, a first attitude detection component, and a control component;

[0008] The bottom end of the support frame is fixedly mounted on the base, the top end of the support frame is fixedly mounted on the first posture detection component, and the top end of the support frame is provided with the fixed point of the AR imaging detection device.

[0009] The bottom end of the first moving component is fixedly mounted on the base, the bottom end of the second moving component is connected to the top end of the first moving component, the top end of the second moving component is connected to the bottom end of the grating waveguide stage component, and the top end of the grating waveguide stage component is used to place the grating waveguide under test.

[0010] The control component is electrically connected to the first attitude detection component, the first moving component, the second moving component, and the AR imaging detection device, with the first attitude detection component connected to the second moving component.

[0011] Furthermore, the first moving component includes an X-direction moving component and a Y-direction moving component;

[0012] The bottom end of the Y-direction moving component is connected to the base, the top end of the Y-direction moving component is connected to the bottom end of the X-direction moving component, and the top end of the X-direction moving component is connected to the bottom end of the second moving component.

[0013] Furthermore, the grating waveguide stage component includes a grating waveguide support stage;

[0014] The grating waveguide support platform has a first grating waveguide support groove and a second grating waveguide support groove.

[0015] Furthermore, a first adsorption hole is provided at the bottom end of the first grating waveguide support groove, and a second adsorption hole is provided at the bottom end of the second grating waveguide support groove.

[0016] Furthermore, it also includes a third moving component, a first optomechanical module, a fourth moving component, and a second optomechanical module;

[0017] The bottom end of the third moving component is connected to the top end of the X-direction moving component, and the top end of the third moving component is connected to the first optomechanical module.

[0018] The bottom end of the fourth moving component is connected to the top end of the X-direction moving component, and the top end of the fourth moving component is connected to the second optomechanical module.

[0019] The third and fourth moving parts are electrically connected to the control unit.

[0020] Furthermore, the first optomechanical module includes a first linkage and a first optomechanical mechanism; the second optomechanical module includes a second linkage and a second optomechanical mechanism.

[0021] One end of the first linkage rod is connected to the top end of the third moving component, and the other end of the first linkage rod is connected to the first optomechanical unit.

[0022] One end of the second linkage is connected to the top of the fourth moving component, and the other end of the second linkage is connected to the second optomechanical unit.

[0023] Furthermore, it also includes a calibration component, a second attitude detection component, and a third attitude detection component;

[0024] The calibration component is disposed on the base;

[0025] The second attitude detection component is disposed on the third moving component, and the third attitude detection component is disposed on the fourth moving component;

[0026] The second attitude detection component is electrically connected to the control component and the third moving component;

[0027] The third attitude detection component is electrically connected to the control component and the fourth moving component.

[0028] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0029] This invention provides a positioning fixture for assisting in the testing of AR imaging detection equipment, comprising a base, a support frame, a first moving component, a second moving component, a grating waveguide stage component, a first attitude detection component, and a control component. The bottom end of the support frame is fixedly mounted on the base, and the top end of the support frame is fixedly mounted on the first attitude detection component and sets the fixed point of the AR imaging detection equipment. The bottom end of the first moving component is fixedly mounted on the base, the bottom end of the second moving component is connected to the top end of the first moving component, and the top end of the second moving component is connected to the bottom end of the grating waveguide stage component, the top end of which is used to place the grating waveguide under test. The control component is electrically connected to the first attitude detection component, the first moving component, and the second moving component. This positioning fixture for assisting in the testing of AR imaging detection equipment enables the AR imaging detection equipment to quickly and accurately determine the coordinate points of the eye box of the grating waveguide for testing. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram illustrating the basic principle of a grating waveguide scheme as an example;

[0032] Figure 2 A schematic diagram of the positioning fixture for testing the auxiliary AR imaging detection equipment provided by this utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the grating waveguide stage component;

[0034] Figure 4 This is a schematic diagram of the structure of the first optomechanical module.

[0035] Among them, 1-optical mechanism, 2-waveguide substrate, 3-coupled grating, 4-coupled grating, 5-base, 6-support frame, 7-first moving component, 8-second moving component, 9-grating waveguide stage component, 9-1-grating waveguide support stage, 9-2-first grating waveguide support groove, 9-3-second grating waveguide support groove, 9-4-first adsorption hole, 9-5-first vacuum adsorption channel connector, 9-6-second adsorption hole, 9-7-second vacuum adsorption channel connector, 10-first attitude detection component, 11-third moving component, 12-first optical mechanism module, 12-1-first linkage rod, 12-2-first optical mechanism stage, 12-3-first optical mechanism, 13-fourth moving component, 14-second optical mechanism module, 15-second attitude detection component, 16-third attitude detection component. Detailed Implementation

[0036] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In this document, the terms "first," "second," and other similar words are not intended to imply any order, quantity, or importance, but are merely used to distinguish different elements. The terms "one," "a," and other similar words are not intended to indicate the existence of only one of the stated things, but rather that the description refers only to one of the stated things, which may have one or more. The terms "comprising," "including," and other similar words are intended to indicate a logical relationship, not a spatial relationship. For example, "A includes B" means that logically B belongs to A, not that spatially B is located inside A. Furthermore, the meanings of the terms "comprising," "including," and other similar words should be considered open-ended, not closed. For example, "A includes B" means that B belongs to A, but B does not necessarily constitute all of A; A may also include other elements such as C, D, and E.

[0038] In this document, the terms "embodiment," "this embodiment," "preferred embodiment," and "one embodiment" do not imply that the description applies only to one specific embodiment, but rather that such description may also be applicable to one or more other embodiments. Those skilled in the art will understand that any description made herein relating to one embodiment can be substituted, combined, or otherwise incorporated with the descriptions in one or more other embodiments. Such substitutions, combinations, or other incorporations resulting in new embodiments are readily conceived by those skilled in the art and fall within the protection scope of this utility model.

[0039] In this description, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] like Figure 2 As shown, this utility model provides a positioning fixture for assisting in the testing of AR imaging detection equipment, including a base 5, a support frame 6, a first moving part 7, a second moving part 8, a grating waveguide stage part 9, a first attitude detection part 10, and a control part (not shown in the figure).

[0041] The bottom of the support frame 6 is fixedly mounted on the base 5, the top of the support frame 6 is fixedly mounted on the first posture detection component 10, and the top of the support frame is set with the fixed point of the AR imaging detection device.

[0042] The bottom end of the first moving part 7 is fixedly mounted on the base 5. The bottom end of the second moving part 8 is connected to the top end of the first moving part 7. The top end of the second moving part 8 is connected to the bottom end of the grating waveguide stage part 9. The top end of the grating waveguide stage part 9 is used to place the grating waveguide under test.

[0043] The control unit is electrically connected to the first attitude detection unit 10, the first moving unit 7, and the second moving unit 8, and the first attitude detection unit 10 is electrically connected to the second moving unit 8.

[0044] The aforementioned first attitude detection component may include a rangefinder and a camera system, and the first attitude detection component may use existing equipment. The aforementioned AR imaging detection equipment may use an existing colorimeter. The aforementioned control component may use an existing controller.

[0045] For example, the first moving component mentioned above includes an X-direction moving component and a Y-direction moving component.

[0046] The bottom end of the Y-direction moving component is connected to the base, the top end of the Y-direction moving component is connected to the bottom end of the X-direction moving component, and the top end of the X-direction moving component is connected to the bottom end of the second moving part. The X-direction moving component and the Y-direction moving component can both be existing sliding components.

[0047] The aforementioned second moving component can be an existing six-axis optical adjustment frame.

[0048] For example, such as Figure 3 As shown, the aforementioned grating waveguide stage component 9 includes a grating waveguide support stage 9-1. The bottom end of the grating waveguide support stage 9-1 is connected to the top end of the second moving component. A first grating waveguide support groove 9-2 and a second grating waveguide support groove 9-3 are formed at the top end of the grating waveguide support stage 9-1. The first grating waveguide support groove 9-2 is used to place the left-side grating waveguide, and the second grating waveguide support groove 9-3 is used to place the right-side grating waveguide. The left-side grating waveguide includes a first coupled-in grating region and a first coupled-out grating region, and the right-side grating waveguide includes a second coupled-in grating region and a second coupled-out grating region.

[0049] To improve the fixation performance of the left grating waveguide in the first grating waveguide support groove and the right grating waveguide in the second grating waveguide support groove, such as... Figure 3 As shown, a first adsorption hole 9-4 is provided at the bottom end of the first grating waveguide support groove 9-2, and a first vacuum adsorption channel connector 9-5 is provided on the side wall of the grating waveguide support stage 9-1 near the first grating waveguide support groove 9-2. A second adsorption hole 9-6 is provided at the bottom end of the second grating waveguide support groove 9-3, and a second vacuum adsorption channel connector 9-7 is provided on the side wall of the grating waveguide support stage 9-1 near the second grating waveguide support groove 9-3. The first adsorption hole 9-4 is connected to the first vacuum adsorption channel through the first vacuum adsorption channel connector 9-5, and the second adsorption hole 9-6 is connected to the second vacuum adsorption channel through the second vacuum adsorption channel connector 9-7.

[0050] To facilitate image projection onto the first coupled grating region of the left grating waveguide placed in the first grating waveguide support groove and onto the second coupled grating region of the right grating waveguide placed in the second grating waveguide support groove. For example... Figure 2 As shown, the positioning fixture for testing the auxiliary AR imaging detection equipment of this utility model also includes a third moving part 11, a first optomechanical module 12, a fourth moving part 13, and a second optomechanical module 14.

[0051] Taking the aforementioned first moving component, which includes an X-direction moving assembly and a Y-direction moving assembly, as an example, the bottom end of the third moving component is connected to the top end of the X-direction moving assembly, and the top end of the third moving component is connected to the first optomechanical module. The first optomechanical module is used to project an image onto the first coupling grating region of the left-hand grating waveguide. The bottom end of the fourth moving component is connected to the top end of the X-direction moving assembly, and the top end of the fourth moving component is connected to the second optomechanical module. The second optomechanical module is used to project an image onto the second coupling grating region of the right-hand grating waveguide. The third and fourth moving components are electrically connected to the control component.

[0052] The aforementioned third and fourth moving parts can be made using existing six-axis optical adjustment frames.

[0053] For example, such as Figure 4 As shown, the first optomechanical module 12 includes a first linkage rod 12-1, a first optomechanical stage 12-2, and a first optomechanical unit 12-3. One end of the first linkage rod 12-1 is connected to the top of the third moving component, and the other end of the first linkage rod 12-1 is connected to one end of the first optomechanical stage 12-2. The first optomechanical unit 12-3 is disposed at the other end of the first optomechanical stage 12-2. The first optomechanical unit is used to project an image into the first coupled grating region of the left-hand grating waveguide.

[0054] For example, the second optomechanical module includes a second linkage rod, a second optomechanical stage, and a second optomechanical device. One end of the second linkage rod is connected to the top of the fourth moving component, and the other end of the second linkage rod is connected to one end of the second optomechanical stage. The second optomechanical device is disposed at the other end of the second optomechanical stage and is used to project an image onto the second coupling grating region of the right-hand grating waveguide.

[0055] The aforementioned first and second optical engines can be made using existing equipment.

[0056] To achieve rapid and high-precision image projection by a first optomechanical system onto the first coupled grating region of the left-hand grating waveguide placed in the support groove of the first grating waveguide, and to achieve rapid and high-precision image projection by a second optomechanical system onto the second coupled grating region of the right-hand grating waveguide placed in the support groove of the second grating waveguide, the positioning fixture for the auxiliary AR imaging detection device of this invention also includes a calibration component, a second attitude detection component, and a third attitude detection component.

[0057] The calibration components are mounted on the base.

[0058] The second attitude detection component is located on the third moving component, and the third attitude detection component is located on the fourth moving component. The second attitude detection component is electrically connected to the control component and the third moving component. The third attitude detection component is electrically connected to the control component and the fourth moving component.

[0059] The above-described calibration component example includes a first support plate, a calibration plate, and a second support plate. The bottom end of the first support plate is connected to the base, the bottom end of the second support plate is connected to the base, one end of the calibration plate is connected to the top end of the first support plate, and the other end of the calibration plate is connected to the top end of the second support plate. A calibration pattern is provided on the top surface of the calibration plate.

[0060] The second attitude detection component may include a rangefinder and a camera system, and the second attitude detection component may use existing equipment. The third attitude detection component may include a rangefinder and a camera system, and the third attitude detection component may use existing equipment.

[0061] The following example illustrates the working principle of the AR imaging detection equipment assisted by the positioning fixture of this utility model for testing the waveguide of the grating under test:

[0062] 1. Input the set test parameters for the grating waveguide under test into the control unit. The grating waveguide under test can be either the left or right grating waveguide. The left grating waveguide includes a first coupled-in grating region and a first coupled-out grating region, while the right grating waveguide includes a second coupled-in grating region and a second coupled-out grating region. The set test parameters for the left grating waveguide include the product model of the left grating waveguide, the test coordinates of the eyepiece of the left grating waveguide, the angle of the left grating waveguide relative to the AR imaging detection device, the position of the first coupled-in grating region of the left grating waveguide, and the projection angle of the first optomechanical system onto the first coupled-in grating region. The test parameters for the right-side grating waveguide under test include the product model of the right-side grating waveguide under test, the coordinates of the test point in the eye box of the right-side grating waveguide under test, the angle of the right-side grating waveguide under test relative to the AR imaging detection device, the position of the second coupling grating region of the right-side grating waveguide under test, and the projection angle of the second optomechanical system onto the second coupling grating region. The following explanation uses the input of the test parameters for the left-side grating waveguide under test into the control unit as an example.

[0063] 2. Place the left grating waveguide to be tested into the first grating waveguide support groove of the grating waveguide stage component.

[0064] 3. The control unit sends a movement command to the first moving unit, so that the first moving unit drives the left grating waveguide under test in the grating waveguide stage component to move to below the first attitude detection unit through the second moving unit.

[0065] 4. The control unit sends a scanning command to the first attitude detection unit. After receiving the scanning command, the first attitude detection unit scans the surface of the left-side grating waveguide under test and sends the scanning information (position and angle information of the left-side grating waveguide under test relative to the AR imaging detection device) to the second moving unit. Based on the received scanning information and the required test parameters of the left-side grating waveguide under test sent by the control unit (including the coordinates of the eyebox test point of the left-side grating waveguide under test and the angle of the left-side grating waveguide under test relative to the AR imaging detection device), the second moving unit drives the left-side grating waveguide under test in the grating waveguide stage component to rotate and adjust the angle so that the angle of the left-side grating waveguide under test relative to the AR imaging detection device meets the test parameter requirements. The second moving unit also drives the left-side grating waveguide under test in the grating waveguide stage component to move below the AR imaging detection device, so that the AR imaging detection device can perform optical performance testing at the eyebox test coordinates of the left-side grating waveguide under test.

[0066] 5. The control unit sends a first shooting command to the first attitude detection unit. After receiving the first shooting command, the first attitude detection unit takes a picture of the calibration pattern on the calibration board and sends the first captured image back to the control unit. At the same time, the control unit sends a second shooting command to the second attitude detection unit. After receiving the second shooting command, the second attitude detection unit takes a picture of the calibration pattern on the calibration board and sends the second captured image back to the control unit. The control unit compares and analyzes the currently captured first and second captured images, and adjusts the position of the second attitude detection unit relative to the first attitude detection unit by sending action commands to the second attitude detection unit until the control unit analyzes that the current first and second captured images meet the requirement that the optical axes of the first and second attitude detection units are parallel. Then the position calibration of the second attitude detection unit relative to the first attitude detection unit is completed.

[0067] 6. The control unit sends a scanning command to the second attitude detection unit. After receiving the scanning command, the second attitude detection unit scans the first optomechanism and sends the scanning information of the first optomechanism (including the position information and angle information of the first optomechanism) to the third moving unit. Based on the received scanning information and the required test parameters of the left-side grating waveguide under test sent by the control unit (including the position of the first coupling grating region of the left-side grating waveguide under test and the projection angle of the first optomechanism onto the first coupling grating region), the third moving unit drives the first optomechanism to rotate and adjust the angle so that the projection angle of the first optomechanism onto the first coupling grating region meets the test parameter requirements. The third moving unit also drives the first optomechanism to move so that the first optomechanism is positioned above the position of the first coupling grating region of the left-side grating waveguide under test.

[0068] 7. Start the first optomechanical system. The first optomechanical system projects image light into the first coupling grating region of the left-side grating waveguide under test. The first coupling grating region of the left-side grating waveguide under test couples the image light into the waveguide substrate. The image light coupled into the waveguide substrate undergoes total internal reflection within the waveguide substrate and is coupled out through the first coupling grating region.

[0069] 8. Start the AR imaging detection equipment. The AR imaging detection equipment performs optical performance testing on the coupled image at the eyebox coordinate point of the left grating waveguide under test.

[0070] 9. The AR imaging detection device sends the optical performance test results to the control unit. The control unit filters the required optical performance test data based on the optical performance test results and outputs the required optical performance test data.

[0071] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the claims of this utility model pending approval.

Claims

1. A positioning fixture for assisting in the testing of AR imaging detection equipment, characterized in that, It includes a base, a support frame, a first moving component, a second moving component, a grating waveguide stage component, a first attitude detection component, and a control component; The bottom end of the support frame is fixedly mounted on the base, the top end of the support frame is fixedly mounted on the first posture detection component, and the top end of the support frame is provided with the fixed point of the AR imaging detection device. The bottom end of the first moving component is fixedly mounted on the base, the bottom end of the second moving component is connected to the top end of the first moving component, the top end of the second moving component is connected to the bottom end of the grating waveguide stage component, and the top end of the grating waveguide stage component is used to place the grating waveguide under test. The control component is electrically connected to the first attitude detection component, the first moving component, the second moving component, and the AR imaging detection device, and the first attitude detection component is connected to the second moving component.

2. The positioning fixture for testing auxiliary AR imaging detection equipment according to claim 1, characterized in that, The first moving component includes an X-direction moving component and a Y-direction moving component; The bottom end of the Y-direction moving component is connected to the base, the top end of the Y-direction moving component is connected to the bottom end of the X-direction moving component, and the top end of the X-direction moving component is connected to the bottom end of the second moving component.

3. The positioning fixture for testing auxiliary AR imaging detection equipment according to claim 1, characterized in that, The grating waveguide stage component includes a grating waveguide support stage; The grating waveguide support platform has a first grating waveguide support groove and a second grating waveguide support groove.

4. The positioning fixture for testing auxiliary AR imaging detection equipment according to claim 3, characterized in that, The bottom end of the first grating waveguide support groove is provided with a first adsorption hole, and the bottom end of the second grating waveguide support groove is provided with a second adsorption hole.

5. The positioning fixture for testing auxiliary AR imaging detection equipment according to claim 2, characterized in that, It also includes a third moving component, a first optomechanical module, a fourth moving component, and a second optomechanical module; The bottom end of the third moving component is connected to the top end of the X-direction moving component, and the top end of the third moving component is connected to the first optomechanical module. The bottom end of the fourth moving component is connected to the top end of the X-direction moving component, and the top end of the fourth moving component is connected to the second optomechanical module. The third and fourth moving parts are electrically connected to the control unit.

6. The positioning fixture for testing auxiliary AR imaging detection equipment according to claim 5, characterized in that, The first optomechanical module includes a first linkage and a first optomechanical mechanism; the second optomechanical module includes a second linkage and a second optomechanical mechanism. One end of the first linkage rod is connected to the top end of the third moving component, and the other end of the first linkage rod is connected to the first optomechanical unit. One end of the second linkage is connected to the top of the fourth moving component, and the other end of the second linkage is connected to the second optomechanical unit.

7. The positioning fixture for testing auxiliary AR imaging detection equipment according to claim 5, characterized in that, It also includes a calibration component, a second attitude detection component, and a third attitude detection component; The calibration component is disposed on the base; The second attitude detection component is disposed on the third moving component, and the third attitude detection component is disposed on the fourth moving component; The second attitude detection component is electrically connected to the control component and the third moving component; The third attitude detection component is electrically connected to the control component and the fourth moving component.

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