An AR diffractive optical waveguide rainbow pattern testing device

Abstract

The present invention relates to an AR diffractive optical waveguide rainbow pattern testing device, which includes a Z-axis hollow rotary table, an A-axis rotary displacement table, a hollow waveguide carrier stage, an imaging brightness and chromaticity meter, and an optical generation module. By simulating the usage scenario of the diffractive optical waveguide in a hemispherical space, the present invention acquires and analyzes multi-dimensional information such as the brightness and chromaticity, azimuth angle, solid angle, and position of the rainbow pattern, and has the ability of calibration, achieving the effects of multi-dimensional and high-precision detection and analysis of the rainbow pattern and improving the repeated measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of diffraction optical waveguide rainbow pattern testing, and in particular to an AR diffraction optical waveguide rainbow pattern testing device. Background Art

[0002] The near-eye display technology of AR waveguide chips, as a thin and light AR technology solution, shows great potential to become a mainstream technology. With the gradual mass production of AR diffraction optical waveguides, the control of the production quality of AR waveguide chips has become increasingly crucial. Rainbow patterns are a common stray light phenomenon in current AR diffraction optical waveguides. When external light irradiates the grating structure on the waveguide chip, a dispersion effect will occur, and when these colored light rays enter the human eye, rainbow patterns are formed. As an unwanted stray light, this kind of rainbow pattern will bring discomfort to the human eye. Therefore, in the production process of the waveguide chip, it is particularly necessary to accurately measure and control the rainbow pattern and analyze its cause.

[0003] Chinese Patent with Publication No. CN718392451A discloses a detection system for an optical waveguide, including: an optical waveguide fixing module for fixing the optical waveguide to be detected; a light generating module for emitting light towards the optical waveguide fixed by the optical waveguide fixing module; a photographing module for photographing the optical waveguide to obtain an optical waveguide image; the optical waveguide image includes rainbow patterns formed by the light emitted by the light generating module on the optical waveguide; and a control module communicatively connected to the light generating module and the photographing module for: controlling the light generating module to emit light towards the optical waveguide with preset light emitting parameters, acquiring the optical waveguide image photographed by the photographing module, and determining the rainbow pattern parameters of the optical waveguide according to different preset light emitting parameters and the optical waveguide images corresponding to each preset light emitting parameter.

[0004] The above prior art solutions have the following defects: The above detection system simulates spatial external light in one-dimensional direction through the light generating module, and supplements it with the photographing module to obtain the radiant flux and spectral data of the rainbow pattern, realizing simple quantitative capture and analysis of the rainbow pattern of the optical waveguide, thereby realizing quantitative evaluation of the strength of the rainbow pattern effect. It can only obtain the light intensity of the rainbow pattern and conduct quantitative evaluation of the strength of the rainbow pattern. For the rainbow pattern light rays in a certain area or multiple areas, after being scattered and then collected, it can only characterize the intensity size of the rainbow pattern in terms of data, which is only quantitative analysis and cannot truly reflect multi-dimensional information such as the brightness chromaticity, azimuth angle, solid angle, and position of the rainbow pattern. When analyzing the rainbow pattern of the diffraction optical waveguide, the rainbow pattern information obtained by the above detection system is less and cannot meet the current analysis requirements.

[0005] Chinese Patent with Publication No. CN718329397A discloses a rainbow pattern detection system for a diffractive optical waveguide, which includes a light source assembly, a diffractive optical waveguide carrier assembly, a rainbow pattern image acquisition assembly, and a rainbow pattern image detection assembly; the light source in the light source assembly is configured to face the position where the diffractive optical waveguide is located and can adjust the different longitudes and / or latitudes of the light source relative to the diffractive optical waveguide; the diffractive optical waveguide carrier assembly is used to carry the diffractive optical waveguide; the rainbow pattern image acquisition assembly is located on one side of the position where the eye box center of the diffractive optical waveguide is located, and is used to acquire the rainbow pattern images of the diffractive optical waveguide at different longitudes and / or latitudes and transmit them to the rainbow pattern detection image assembly; the rainbow pattern image detection assembly determines the multi-dimensional image information of the rainbow pattern based on the acquired rainbow pattern images at different longitudes and / or latitudes.

[0006] The above prior art solution has the following defects: The light source assembly of the above detection system uses an annular light source to simulate the light rays emitted by the ambient light source at different longitudes and / or latitudes, and then determines the multi-dimensional image information of the rainbow pattern, such as the brightness, area, intensity distribution, color distribution, and azimuth angle of the rainbow pattern. However, it is still limited to simulating the external light in one-dimensional direction and cannot comprehensively reflect all the information of the rainbow pattern. Especially in practical applications, the formation and manifestation of the rainbow pattern are often affected by various factors, such as the incident angle, wavelength, and intensity of the light source.

[0007] Therefore, the existing rainbow pattern testing devices are difficult to fully simulate the external light, cannot quantitatively test the specific source azimuth of the external light, cannot quantitatively test the specific angle of the light incident on the waveguide and the specific angle of the stray light entering the human eye, and cannot determine which local area on the waveguide causes the rainbow pattern due to dispersion. For the testing of the rainbow pattern of the diffractive optical waveguide, a more comprehensive and accurate testing device is needed to achieve multi-dimensional and high-precision detection and analysis of the rainbow pattern. Summary of the Invention

[0008] The problem to be solved by the present invention is to provide an AR diffractive optical waveguide rainbow pattern testing device for the above-mentioned deficiencies in the prior art. It simulates the usage scenario of the diffractive optical waveguide in a hemispherical space, acquires and analyzes multi-dimensional information such as the brightness, chromaticity, azimuth angle, solid angle, and position of the rainbow pattern, and has the ability of calibration and calibration, so as to achieve multi-dimensional and high-precision detection and analysis of the rainbow pattern and improve the effect of repeated measurement accuracy.

[0009] The above object of the present invention is achieved by the following technical solutions:

[0010] An AR diffraction optical waveguide rainbow pattern testing device, comprising a Z-axis hollow rotating table, an A-axis rotating displacement table, a hollow waveguide carrier table, an imaging brightness chroma meter, and an optical generation module; wherein,

[0011] The hollow waveguide carrier table is arranged at the rotating end of the Z-axis hollow rotating table and is used for selectively mounting a target and a diffraction optical waveguide;

[0012] The detection end of the imaging brightness chroma meter, the target point of the target, the coupling-out area of the diffraction optical waveguide, and the rotation axis line of the Z-axis hollow rotating table are approximately on the same detection axis line, and the rotation axis line of the A-axis rotating displacement table is perpendicular to and intersects the detection axis line;

[0013] The optical generation module is mounted at the rotating end of the A-axis rotating displacement table in such a way that the light output end faces the hollow waveguide carrier table, and the light output angle of the optical generation module on the A-axis rotating displacement table is adjustable, so that the imaging brightness chroma meter can obtain the light transmission image information of the target point of the target in the initial spherical coordinates and the multi-dimensional image information of the rainbow pattern of the diffraction optical waveguide in different spherical coordinates.

[0014] Further, the relative movement path of the hollow waveguide carrier table and the optical generation module forms a hemispherical space. Taking the light output point P(t, a, r) of the optical generation module as a point (x, y, z) in the hemispherical space, the spherical coordinates of the light output point P are expressed as (r, θ, φ); where, r represents the distance from the light output point P to the light input point O of the diffraction optical waveguide, θ represents the angle between the light output point P and the Z-axis, φ represents the angle between the plane passing through the Z-axis and the R-axis and the X-axis, x = r * sinθ * cosφ, y = r * sinθ * sinφ, z = r * cosθ.

[0015] Still further, in the initial spherical coordinates, control r = 40 - 60 cm, θ = 0°, φ = 0°.

[0016] Still further, in different spherical coordinates, control r = 10 - 100 cm, θ = -90 - 90°, φ = 0 - 360°.

[0017] Even further, the Z-axis hollow rotating table and the A-axis rotating displacement table each independently have scale lines and 0° scale line markings in the initial spherical coordinates.

[0018] Furthermore, the Z-axis hollow rotary stage is set as the hollow type coarse and fine adjustment rotary stage PT-SR160. Among them, model: PDV PT-SR160, table size = φ160, rotary axis, coarse adjustment 360°, fine adjustment ±3°, differential head side drive, cross roller guide, aluminum alloy material, black anodized surface treatment, visual reading = 1°, differential head reading ≈ 0.007°, bearing capacity = 196N / 20.0kg, eccentricity = 20μ, parallelism = 40μ, table runout = 20μ, weight = 1.9kg.

[0019] Furthermore, the A-axis rotary displacement stage is set as the manual rotary displacement stage RP01. Among them, Thorlabs RP01, with a Ø2-inch rotary table, is very suitable for larger optomechanical components that require smooth and backlash-free rotation. The displacement stage can rotate continuously for 360°, the outer circumference scale interval of the rotary table is 2°, and numbers are marked below the scale lines corresponding to every 20°. Using a 5 / 74-inch (2.0mm) ball head screwdriver or hex wrench, the rotation can be locked by the fixing screws on the fixed side.

[0020] Still further, the target point of the target is set as the transmission area, and other surfaces are set as the reflection area.

[0021] Still further, the multi-dimensional image information includes the brightness size, area size, intensity distribution, color distribution, azimuth angle, solid angle, and the number of pixels of the rainbow pattern.

[0022] Even further, the azimuth angle = n*2π(1 - cosθ), where n represents the number of pixels of the rainbow pattern.

[0023] Further, the hollow waveguide carrier stage includes a mounting frame arranged at the rotating end of the Z-axis hollow rotary stage, at least two clamping pieces, and a fastener group arranged on the mounting frame and the clamping pieces. The at least two clamping pieces are arranged at equal intervals along the circumference of the opening of the mounting frame, and a gap for tightly inserting the target or the diffractive optical waveguide is reserved between the clamping pieces and the mounting frame. Among them, the fastener group can be set as at least two fastening bolts threadedly connected to the mounting frame and the clamping pieces and tightly abutted against the surface of the clamping pieces.

[0024] Further, the imaging type brightness and chromaticity meter is set as VA2000-F. Among them, the imaging type brightness and chromaticity meter should have the following characteristics: the aperture stop of the detection end lens is located on the object side of the lens, and the size of the aperture stop needs to be equivalent to the pupil size of the human eye, with a reference size of 3 - 4mm, so as to be able to capture a picture equivalent to the human eye's field of view and directly calculate and output the brightness and chromaticity of the light at each position in the picture.

[0025] Further, it further includes a Z-axis linear slide, the moving direction of the Z-axis linear slide is parallel to the detection axis, and the imaging brightness and chromaticity meter is disposed on the moving end of the Z-axis linear slide.

[0026] Still further, the Z-axis linear slide is set as a linear translation stage Z-TSX-M1. Among them, Z-TSX-M1 has a 20 TPI precision lead screw drive for rough / fine positioning. By using the side-mounted positioning screws, the displacement stage can be firmly locked in place, and the dovetail slide bearings can achieve smooth lockable movement with a stroke exceeding 1 inch. The hand-tightening knob can achieve rapid positioning and a stepping sensitivity of 1 mm per revolution. This displacement stage can be adjusted from either side, making it a multi-functional tool for smooth and rapid positioning within the system.

[0027] Still further, it further includes an equipment bracket, and the Z-axis linear slide, the Z-axis hollow rotary stage, and the A-axis rotary displacement stage are each independently mounted on the equipment bracket.

[0028] Further, it further includes an R-axis linear slide disposed at the rotating end of the A-axis rotary displacement stage, an A-axis rotary positioning stage disposed at the moving end of the R-axis linear slide, an A-axis telescopic connecting rod disposed at the rotating end of the A-axis rotary positioning stage, and a pitching adjustment bracket disposed at the moving end of the A-axis telescopic connecting rod. The light generating module is detachably connected to the pitching adjustment bracket.

[0029] Still further, the R-axis linear slide is set as a set of configured optical rails OOM-G600 and rail sliders OOP60-M. Among them, the optical rails can combine other adjustment brackets into a coaxial linear slide through the rail sliders, which is particularly suitable for building small optical experiments. The rail sliders can be fixed at any position along the mounting surface of the optical rails and can arbitrarily connect different optomechanical components; OOM-G600, 600*50*25 mm, 5 counterbore holes Ø6.2 mm, 3 counterbore holes Ø6.2*56.3 mm, weight 7169.4 g; OOP-60, 60*711*22 mm, 4 M2 thread types, 2 M4, 1 M16, 2 Ø4.5 mm counterbore holes, weight 170.5 g.

[0030] Still further, the A-axis rotary positioning stage is set as a manual rotary displacement stage RP01. Among them, Thorlabs RP01 has a Ø2-inch rotating platform, which is very suitable for larger optomechanical components that require smooth and non-backlash rotation. The displacement stage can rotate continuously by 360°. The outer circumference scale interval of the rotating platform is 2°, and numbers are marked below the scale lines corresponding to every 20°. By using a 5 / 74-inch (2.0 mm) ball head screwdriver or hex wrench and fixing the fixing screws on the side, the rotation can be locked.

[0031] Furthermore, the A-axis telescopic connecting rod is set as a telescopic connecting rod bracket CAT57-S. Among them, OeabtCAT57-S, L = 57mm, the rotation height is 8mm, compatible with a Ø72.7mm connecting rod, and there is an M6 screw hole.

[0032] Furthermore, the pitch adjustment frame is set as a standard two-axis adjustable mirror frame MK100-A. Among them, OeabtMK100-A, used for directly installing a Ø1-inch lens, the diameter of the frame hole is Ø = 25.7mm, compatible with a lens thickness of 2 - 10mm. By adjusting two screws, the lens can be tilted and pitched. The single-axis adjustment amount is ±4° in angle, and the adjustment range can be installed in the left or right hand direction. The frame can be fixed to various column brackets through M4 screw holes. Compared with the optical adjustment frame, the precision adjustment frame has a thicker rear plate and a tighter spring, enhancing stability.

[0033] By adopting the above technical solutions, the Z-axis hollow rotary table, A-axis rotary displacement table, R-axis linear slide, A-axis rotary positioning table, A-axis telescopic connecting rod, and pitch adjustment frame each independently adopt mechanical automation control or manual adjustment. In the manual adjustment mode, there should be scale markings for angle adjustment to facilitate indicating the displacement amount;

[0034] During the calibration process, first install the target on the hollow waveguide carrier platform. The center of the target has a target point for indication, and other areas can reflect light. Make the target point approximately coincide with the rotation axis of the Z-axis hollow rotary table. Then, adjust the light output direction of the light generation module through the R-axis linear slide, A-axis rotary positioning table, A-axis telescopic connecting rod, and pitch adjustment frame until the light emitted by the light generation module passes through the target point and then enters the lens of the imaging brightness and chromaticity meter, which is regarded as completing the calibration of the initial state of the test device. This is of great significance for improving the measurement repeatability accuracy, and the current position is used as the starting position for quantitative measurement;

[0035] During the actual detection process, first install the diffractive optical waveguide on the hollow waveguide carrier platform and make the center of the human eye observation area of the diffractive optical waveguide coincide with the light emitted by the light generation module. Use the imaging brightness and chromaticity meter to record the initial light source brightness. Then, adjust the displacement amounts of the Z-axis hollow rotary table and A-axis rotary displacement table to make the light generation module move relative to the hemispherical surface of the diffractive optical waveguide, and use the imaging brightness and chromaticity meter to record the multi-dimensional image information in the hemispherical space; if there is no rainbow pattern, the picture taken by the imaging brightness and chromaticity meter is a completely black picture except for the light source. If the brightness exceeding the initial light source brightness is captured, it is regarded as the appearance of rainbow pattern stray light. At this time, taking the light output point P(r, t, a) of the light generation module as a point (x, y, z) in the hemispherical space, the light output point P can also be represented by spherical coordinates (r, θ, φ). From this, parameters such as the brightness and chromaticity of the rainbow pattern stray light, the azimuth angle of the rainbow pattern (n * 2π(1 - cosθ)), and the number of rainbow pattern pixels (n) can be calculated;

[0036] During this process, the hollow waveguide carrier stage and the light generation module are driven by the Z-axis hollow rotary stage and the A-axis rotary displacement stage to simulate the usage scenario of the diffractive optical waveguide in the hemispherical space. Supplementary components such as the R-axis linear slide, the A-axis rotary positioning stage, the A-axis telescopic connecting rod, and the pitch adjustment frame have calibration capabilities, facilitating the acquisition and analysis of multi-dimensional information such as the brightness, chromaticity, azimuth angle, solid angle, and position of the rainbow pattern through an imaging brightness and chromaticity meter, achieving multi-dimensional and high-precision detection and analysis of the rainbow pattern, as well as the effect of improving the repeat measurement accuracy.

[0037] In summary, the beneficial technical effects of the present invention are as follows:

[0038] 1. The hollow waveguide carrier stage and the light generation module are driven by the Z-axis hollow rotary stage and the A-axis rotary displacement stage to simulate the usage scenario of the diffractive optical waveguide in the hemispherical space. Supplementary components such as the R-axis linear slide, the A-axis rotary positioning stage, the A-axis telescopic connecting rod, and the pitch adjustment frame have calibration capabilities, facilitating the acquisition and analysis of multi-dimensional information such as the brightness, chromaticity, azimuth angle, solid angle, and position of the rainbow pattern through an imaging brightness and chromaticity meter, achieving multi-dimensional and high-precision detection and analysis of the rainbow pattern, as well as the effect of improving the repeat measurement accuracy;

[0039] 2. A hemispherical space is formed by the relative movement path of the hollow waveguide carrier stage and the light generation module, simulating various light incidence situations that the diffractive optical waveguide may encounter in actual use, thereby being able to more comprehensively reflect all the information of the rainbow pattern;

[0040] 3. Utilizing the high-precision detection ability of the imaging brightness and chromaticity meter, it is possible to accurately obtain multi-dimensional information such as the brightness, chromaticity, azimuth angle, solid angle, and position of the rainbow pattern, providing more comprehensive and accurate data support for the analysis of the rainbow pattern;

[0041] 4. The present invention also realizes the calibration of the test device by setting the target and the initial spherical coordinates, further improving the accuracy and reliability of the measurement;

[0042] 5. Components such as the Z-axis hollow rotary stage and the A-axis rotary displacement stage in the present invention are all selected with high-precision and high-stability models, ensuring the overall performance and stability of the test device;

[0043] 6. The test device of the present invention has a simple structure and is easy to operate, is suitable for the rainbow pattern testing of various diffractive optical waveguides, and has a wide application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic structural diagram of the AR diffractive optical waveguide rainbow pattern test device according to Embodiment 1 of the present invention.

[0045] Figure 2It is a schematic diagram of the connection relationship among the device support, Z-axis linear slide, Z-axis hollow rotary table, and A-axis rotary displacement table in Embodiment 2 of the present invention.

[0046] Figure 3 It is a schematic diagram of the connection relationship among the device support, Z-axis hollow rotary table, and hollow waveguide carrier stage in Embodiment 3 of the present invention.

[0047] Figure 4 It is a schematic diagram of the connection relationship among the device support, Z-axis linear slide, and imaging brightness and chromaticity meter in Embodiment 4 of the present invention.

[0048] Figure 5 It is a schematic diagram of the connection relationship among the A-axis rotary displacement table, R-axis linear slide, A-axis rotary positioning table, A-axis telescopic connecting rod, pitch adjustment bracket, and light generation module in Embodiment 5 of the present invention.

[0049] Figure 6 It is a schematic diagram of the connection relationship between the AR diffractive optical waveguide rainbow pattern testing device and the hemispherical space in Embodiment 6 of the present invention.

[0050] Figure 7 It is a schematic diagram of the usage state of the AR diffractive optical waveguide rainbow pattern testing device in the calibration process in Embodiment 6 of the present invention.

[0051] Figure 8 It is a schematic diagram of the usage state of the AR diffractive optical waveguide rainbow pattern testing device in the rainbow pattern detection process in Embodiment 6 of the present invention.

[0052] In the figure, 1 is the device support; 2 is the Z-axis linear slide; 3 is the Z-axis hollow rotary table; 4 is the A-axis rotary displacement table; 5 is the hollow waveguide carrier stage; 51 is the mounting frame; 52 is the clip; 53 is the fastener group; 6 is the imaging brightness and chromaticity meter; 7 is the light generation module; 71 is the R-axis linear slide; 72 is the A-axis rotary positioning table; 73 is the A-axis telescopic connecting rod; 74 is the pitch adjustment bracket; 8 is the target; 9 is the diffractive optical waveguide. Detailed Embodiments

[0053] In order to make the technical means, creative features, achieved purposes, and functions of the present invention clearer and easier to understand, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0054] Embodiment 1: Refer to Figure 1 , an AR diffractive optical waveguide rainbow pattern testing device disclosed in the present invention, includes a Z-axis hollow rotary table 3, an A-axis rotary displacement table 4, a hollow waveguide carrier stage 5, an imaging brightness and chromaticity meter 6, and a light generation module 7; wherein,

[0055] The hollow waveguide carrier stage 5 is arranged at the rotating end of the Z-axis hollow rotary table 3 and is used for selectively mounting the target 8 and the diffractive optical waveguide 9;

[0056] The detection end of the imaging luminance chrominance meter 6, the target point of the target 8, the light extraction area of the diffractive optical waveguide 9, and the rotation axis center line of the Z-axis hollow rotary table 3 are approximately on the same detection axis, and the rotation axis center line of the A-axis rotary displacement table 4 is perpendicular to and intersects the detection axis;

[0057] The light generation module 7 is installed at the rotating end of the A-axis rotary displacement table 4 in such a way that the light output end faces the hollow waveguide carrier 5, and the light output angle of the light generation module 7 on the A-axis rotary displacement table 4 is adjustable, so that the imaging luminance chrominance meter 6 can obtain the light transmission image information of the target point of the target 8 in the initial spherical coordinates and the multi-dimensional image information of the rainbow pattern of the diffractive optical waveguide 9 in different spherical coordinates.

[0058] Example 2: Refer to Figure 2 , an AR diffractive optical waveguide rainbow pattern testing device disclosed by the present invention. The difference from Example 1 is that it further includes an equipment bracket 1 and a Z-axis linear slide 2, and the Z-axis linear slide 2, the Z-axis hollow rotary table 3, and the A-axis rotary displacement table 4 are each independently installed on the equipment bracket 1.

[0059] The Z-axis linear slide 2 is set as a linear translation stage Z-TSX-M1. The moving direction of the Z-axis linear slide 2 is parallel to the detection axis, and the imaging luminance chrominance meter 6 is arranged on the moving end of the Z-axis linear slide 2. Among them, Z-TSX-M1 has a 20 TPI precision lead screw drive for rough / fine positioning. By using the side-mounted positioning screws, the displacement stage can be firmly locked in place, and the dovetail slide bearings can achieve smooth and lockable movement with a stroke exceeding 1 inch. The hand-tightening knob can achieve rapid positioning and a stepping sensitivity of 1 mm per revolution. This displacement stage can be adjusted from either side, making it a multi-functional tool for smooth and rapid positioning within the system.

[0060] The Z-axis hollow rotary table 3 is set as a hollow type coarse and fine adjustment rotary platform PT-SR160. Among them, model: PDV PT-SR160, table size = φ160, rotation axis, coarse adjustment 360°, fine adjustment ±3°, differential head side drive, cross roller guide, aluminum alloy material, black anodized surface treatment, visual reading = 1°, differential head reading ≈ 0.007°, load capacity = 196 N / 20.0 kg, eccentricity = 20 μ, parallelism = 40 μ, table runout = 20 μ, weight = 1.9 kg.

[0061] The A-axis rotary displacement stage 4 is set as a manual rotary displacement stage RP01. Among them, Thorlabs RP01 has a Ø2-inch rotary platform and is very suitable for larger optomechanical components that require smooth and non-backlash rotation. The displacement stage can rotate continuously by 360°, the circumferential scale interval of the rotary platform is 2°, and numbers are marked below the scale lines corresponding to every 20°. Using a 5 / 74-inch (2.0 mm) ball-head screwdriver or hex wrench, rotation can be locked by the fixing screws on the fixed side.

[0062] Example 3: Refer to Figure 3 , an AR diffractive optical waveguide rainbow pattern testing device disclosed by the present invention. Different from Example 1, the hollow waveguide carrier 5 includes a mounting frame 51 arranged at the rotating end of the Z-axis hollow rotary stage 3, a pair of clamping pieces 52, and a fastener group 53 arranged on the mounting frame 51 and the clamping pieces 52. This pair of clamping pieces 52 are arranged at equal intervals along the circumference of the opening of the mounting frame 51, and a gap for tightly inserting the target 8 or the diffractive optical waveguide 9 is reserved between the clamping pieces 52 and the mounting frame 51. Among them, the fastener group 53 can be set as two fastening bolts threadedly connected to the mounting frame 51 and the clamping pieces 52 and tightly abutting against the surface of the clamping pieces 52.

[0063] Example 4: Refer to Figure 4 , an AR diffractive optical waveguide rainbow pattern testing device disclosed by the present invention. Different from Example 1, the imaging type brightness and chromaticity meter 6 is set as VA2000-F. Among them, the imaging type brightness and chromaticity meter 6 should have the following characteristics: the aperture stop of the detection end lens is located on the object side of the lens, and the size of the aperture stop needs to be equivalent to the size of the human eye pupil, with a reference size of 3 - 4 mm, so as to be able to capture a picture equivalent to the human eye's field of view and directly calculate and output the brightness and chromaticity of the light at each position in the picture.

[0064] Example 5: Refer to Figure 5 , an AR diffractive optical waveguide rainbow pattern testing device disclosed by the present invention. Different from Example 1, it further includes an R-axis linear slide 71 arranged at the rotating end of the A-axis rotary displacement stage 4, an A-axis rotary positioning stage 72 arranged at the moving end of the R-axis linear slide 71, an A-axis telescopic connecting rod 73 arranged at the rotating end of the A-axis rotary positioning stage 72, and a pitching adjustment frame 74 arranged at the moving end of the A-axis telescopic connecting rod 73. The light generation module 7 is detachably connected to the pitching adjustment frame 74.

[0065] The R-axis linear slide 71 is configured as a group of optical guide rails OOM-G600 and guide rail sliders OOP60-M. Among them, the optical guide rail can be combined with other adjustment frames into a coaxial linear slide through the guide rail slider, which is particularly suitable for building small optical experiments. The guide rail slider can be fixed at any position along the optical guide rail mounting surface, and different optical mechanical parts can be arbitrarily transferred; OOM-G600, 600*50*25mm, 5 countersunk holes Ø6.2mm, 3 Ø6.2*56.3mm, weight 7169.4g; OOP-60, 60*711*22mm, thread type 4 M2, 2 M4, 1 M16, 2 Ø4.5mm countersunk holes, weight 170.5g.

[0066] The A-axis rotation positioning stage 72 is set up as a manual rotation stage RP01. Among them, the Thorlabs RP01, with a Ø2" rotation platform, is ideal for larger optomechanical components that require smooth and backlash-free rotation. The stage can rotate continuously through 360°. The outer circumference of the rotation platform is graduated at 2° intervals, and the scale lines corresponding to every 20° are marked below. The rotation can be locked by tightening the set screws on the side using a 5 / 74" (2.0mm) ball screwdriver or hex wrench.

[0067] The A-axis telescopic extension rod 73 is set as a telescopic extension rod bracket CAT57-S. Among them, Oeabt CAT57-S, L=57mm, twist height 8mm, compatible with Ø72.7mm extension rod, M6 screw hole.

[0068] The pitch adjustment frame 74 is set as a standard two-axis adjustable frame MK100-A. Among them, Oeabt MK100-A is used to directly install Ø1-inch lenses, the frame hole diameter Ø=25.7mm, compatible with lenses with a thickness of 2~10mm, the lens can be tilted and pitched by adjusting two screws, the single-axis adjustment amount is ±4°, the adjustment range can be installed in the left or right hand direction, the frame can be fixed on various column brackets through the M4 screw hole, and the double adjuster is compared with the optical adjustment frame. The rear plate of the precision adjustment frame is thicker and the spring is tighter, which enhances stability.

[0069] Example 6: Reference Figure 6, which is a test device for AR diffraction optical waveguide rainbow patterns disclosed in the present invention. The difference from Embodiment 1 is that the light source of the light generation module 7 can be a parallel point light source or a standard diffuse reflection point light source. When the light source is a parallel point light source, the incident angle and incident area of the light source on the diffraction optical waveguide 9 can be precisely controlled, which is suitable for verifying design and theoretical analysis scenarios. When the light source is a standard diffuse reflection point light source, it can simulate the illumination scenario of daily external light and is suitable for production quality inspection. The wavelength of the light source can also be replaced according to specific requirements, and it can be LED monochromatic light, LED composite light, or laser with a specific wavelength. The brightness of the light source is adjustable, and the corresponding light generation module 7 can be configured according to the specific requirements of the light source for light brightness adjustment.

[0070] The relative movement path of the hollow waveguide stage 5 and the light generation module 7 forms a hemispherical space. Taking the light exit point P(t, a, r) of the light generation module 7 as a point (x, y, z) within the hemispherical space, the spherical coordinates of the light exit point P are expressed as (r, θ, φ); where r represents the distance from the light exit point P to the light incident point O of the diffraction optical waveguide 9, θ represents the angle between the light exit point P and the Z-axis, and φ represents the angle between the plane passing through the Z-axis and the R-axis and the X-axis, x = r * sinθ * cosφ, y = r * sinθ * sinφ, z = r * cosθ.

[0071] Therefore, in the initial spherical coordinates, control r = 30 cm, θ = 0°, φ = 0°. At different spherical coordinates, control r = 10 - 100 cm, θ = -90 - 90°, φ = 0 - 360°, that is, perform detection within the hemispherical space. The Z-axis hollow rotary stage 3 and the A-axis rotary displacement stage 4 each independently have scale lines and a 0° scale line mark in the initial spherical coordinates.

[0072] Refer to Figure 7 , during the calibration process, first install the target 8 on the hollow waveguide stage 5. The target point of the target 8 is set as the transmission area, and other surfaces are set as the reflection area. And approximate the target point to coincide with the rotation axis of the Z-axis hollow rotary stage 3. Then, adjust the light exit direction of the light generation module 7 through the R-axis linear slide 71, A-axis rotary positioning stage 72, A-axis telescopic rod 73, and pitch adjustment frame 74 until the light emitted by the light generation module 7 passes through the target point and is incident into the lens of the imaging luminance chroma meter 6, which is regarded as completing the calibration of the initial state of the test device. This is of great significance for improving the measurement repeatability accuracy, and the current position is used as the starting position for quantitative measurement.

[0073] Refer to Figure 8, during the rainbow pattern detection process, first install the diffractive optical waveguide 9 on the hollow waveguide stage 5, and make the center of the human eye observation area of the diffractive optical waveguide 9 coincide with the light emitted by the light generation module 7. Use the imaging brightness and chromaticity meter 6 to record the initial light source brightness. Then, adjust the displacement amounts of the Z-axis hollow rotary stage 3 and the A-axis rotary displacement stage 4 so that the light generation module 7 moves relative to the hemispherical surface of the diffractive optical waveguide 9. Use the imaging brightness and chromaticity meter 6 to record the multi-dimensional image information in the hemispherical space. The multi-dimensional image information includes the brightness size, area size, intensity distribution, color distribution, azimuth angle (n * 2π(1 - cosθ)), solid angle, and the number of pixels n of the rainbow pattern; if there is no rainbow pattern, the image captured by the imaging brightness and chromaticity meter 6 is a completely black image except for the light source. If the captured brightness exceeds the initial light source brightness, it is regarded as the appearance of rainbow pattern stray light; at this time, taking the light-emitting point P(r, t, a) of the light generation module 7 as a point (x, y, z) in the hemispherical space, the light-emitting point P can also be represented by spherical coordinates (r, θ, φ). Thus, parameters such as the brightness and chromaticity of the rainbow pattern stray light, the azimuth angle of the rainbow pattern, and the number of rainbow pattern pixels can be calculated.

[0074] In the above process, the Z-axis hollow rotary stage 3 and the A-axis rotary displacement stage 4 drive the hollow waveguide stage 5 and the light generation module 7 to simulate the usage scenario of the diffractive optical waveguide 9 in the hemispherical space, and are supplemented by the R-axis linear slide 71, the A-axis rotary positioning stage 72, the A-axis telescopic connecting rod 73, and the pitch adjustment frame 74 with calibration capabilities, which is convenient for obtaining and analyzing multi-dimensional information such as the brightness and chromaticity, azimuth angle, solid angle, and position of the rainbow pattern through the imaging brightness and chromaticity meter 6, achieving the effects of multi-dimensional and high-precision detection and analysis of the rainbow pattern, and improving the repeated measurement accuracy.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An AR diffraction optical waveguide rainbow pattern testing device, characterized by: It comprises a Z-axis hollow rotating stage (3), an A-axis rotating displacement stage (4), a hollow waveguide carrier (5), an imaging brightness colorimeter (6), and a light generating module (7); wherein, The hollow waveguide carrier (5) is arranged at the rotating end of the Z-axis hollow rotating platform (3) and is used to selectively install the target (8) and the diffraction optical waveguide (9); The detection end of the imaging colorimeter (6), the target point of the target (8), the outcoupling region of the diffraction light waveguide (9), and the rotation axis of the Z-axis hollow rotating platform (3) are approximately located on the same detection axis, and the rotation axis of the A-axis rotating displacement platform (4) intersects the detection axis at right angles; The light generating module (7) is installed on the rotating end of the A-axis rotation displacement stage (4) in a manner such that the light emitting end faces the hollow waveguide carrier (5), and the light emitting angle of the light generating module (7) on the A-axis rotation displacement stage (4) is adjustable, so that the imaging brightness colorimeter (6) can obtain the light transmission image information of the target point (8) under the initial spherical coordinates, and the multi-dimensional image information of the rainbow pattern of the diffraction light waveguide (9) under different spherical coordinates.

2. The AR diffraction optical waveguide rainbow pattern testing device according to claim 1, characterized in that: The relative movement path of the hollow waveguide carrier (5) and the light generating module (7) forms a hemispherical space, with the light output point P (t, a, r) ​​of the light generating module (7) being a point (x, y, z) in the hemispherical space, and the spherical coordinates of the light output point P being expressed as (r, θ, φ); wherein r represents the distance from the light output point P to the light input point O of the diffraction light waveguide (9), θ represents the angle between the light output point P and the Z axis, φ represents the angle between the plane passing through the Z axis and the R axis and the X axis, x=r*sinθ*cosφ, y=r*sinθ*sinφ, z=r*cosθ.

3. The AR diffraction optical waveguide rainbow pattern testing device according to claim 2, characterized in that: In the initial spherical coordinates, control r=40~60cm, θ=0°, φ=0°.

4. The AR diffraction optical waveguide rainbow pattern testing device according to claim 2, characterized in that: Under different spherical coordinates, control r=10~100cm, θ=-90~90°, φ=0~360°.

5. An AR diffraction optical waveguide rainbow pattern testing device according to any one of claims 2 to 4, characterized in that: The Z-axis hollow rotating stage (3) and the A-axis rotating displacement stage (4) each independently have scale lines and a 0° scale line mark under the initial spherical coordinates.

6. The AR diffraction optical waveguide rainbow pattern testing device according to claim 2, characterized in that: The target point of the target (8) is set as a transmission area, and the other surfaces are set as reflection areas.

7. The AR diffraction optical waveguide rainbow pattern testing device according to claim 2, characterized in that: The multi-dimensional image information includes the brightness, area, intensity distribution, color distribution, azimuth, solid angle, and number of pixels of the rainbow pattern.

8. The AR diffraction optical waveguide rainbow pattern testing device according to claim 1, characterized in that: The hollow waveguide carrier (5) comprises a mounting frame (51) arranged at the rotating end of the Z-axis hollow rotating table (3), at least two clips (52), and a fastener group (53) arranged on the mounting frame (51) and the clips (52), wherein the at least two clips (52) are arranged at equal intervals along the circumference of the opening of the mounting frame (51), and a gap is reserved between the clips (52) and the mounting frame (51) for a target (8) or a diffraction optical waveguide (9) to be tightly plugged in.

9. The AR diffraction optical waveguide rainbow pattern testing device according to claim 1, characterized in that: It also comprises a Z-axis linear slide (2), the moving direction of the Z-axis linear slide (2) is parallel to the detection axis, and the imaging brightness colorimeter (6) is arranged at the moving end of the Z-axis linear slide (2).

10. The AR diffraction optical waveguide rainbow pattern testing device according to claim 1, characterized in that: It also includes an R-axis linear slide (71) arranged at the rotating end of the A-axis rotation displacement stage (4), an A-axis rotation positioning stage (72) arranged at the moving end of the R-axis linear slide (71), an A-axis telescopic connecting rod (73) arranged at the rotating end of the A-axis rotation positioning stage (72), and a pitch adjustment frame (74) arranged at the moving end of the A-axis telescopic connecting rod (73), and the light generating module (7) is detachably connected to the pitch adjustment frame (74).

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