AR diffraction optical waveguide rainbow pattern testing device

Abstract

The invention relates to an AR diffraction optical waveguide rainbow pattern testing device which comprises a Z-axis hollow rotating table, an A-axis rotating displacement table, a hollow waveguide carrying table, an imaging type brightness and chrominance meter and a light generation module. According to the invention, by simulating the use scene of the diffractive optical waveguide in the hemispherical space, the multi-dimensional information such as the brightness, the azimuth angle, the solid angle and the position of the rainbow pattern is acquired and analyzed, the calibration capability is provided, the multi-dimensional and high-precision detection and analysis of the rainbow pattern are realized, and the effect of improving the repeated measurement precision is achieved.

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] AR waveguide near-eye display technology, as a lightweight AR technology solution, shows great potential to become a mainstream technology. With the gradual mass production of AR diffraction optical waveguides, the control of AR waveguide production quality has become increasingly critical. Rainbow patterns are a common stray light phenomenon in AR diffraction optical waveguides. When external light shines on the grating structure on the waveguide, a dispersion effect is produced, and when these dispersed lights enter the human eye, rainbow patterns are formed. This rainbow pattern, as an unwanted stray light, will cause discomfort to the human eye. Therefore, in the production process of waveguides, it is particularly necessary to accurately measure and control the rainbow patterns and analyze their causes.

[0003] A Chinese patent with publication number CN718392451A discloses a detection system for an optical waveguide, comprising: an optical waveguide fixing module, used to fix an optical waveguide to be detected; a light generating module, used to emit light toward the optical waveguide fixed by the optical waveguide fixing module; a shooting module, used to shoot the optical waveguide to obtain an optical waveguide image; the optical waveguide image includes rainbow patterns formed on the optical waveguide by the light emitted by the light generating module; and a control module, which is communicatively connected to the light generating module and the shooting module, and is used to: control the light generating module to emit light toward the optical waveguide with preset light emission parameters, obtain the optical waveguide image captured by the shooting module, and determine the rainbow pattern parameters of the optical waveguide according to different preset light emission parameters and the optical waveguide images corresponding to each preset light emission parameter.

[0004] The above-mentioned prior art solutions have the following defects: the above-mentioned detection system simulates external light in space in one-dimensional direction through the light generating module, and is assisted by the shooting module to obtain the radiation flux and spectral data of the rainbow pattern, thereby realizing a simple quantitative capture and analysis of the rainbow pattern of the optical waveguide, thereby realizing a quantitative evaluation of the strength of the rainbow pattern effect. It can only obtain the light intensity of the rainbow pattern and conduct a quantitative evaluation of the strength of the rainbow pattern. The rainbow pattern light for a certain area or multiple areas is first dispersed and then collected, and can only characterize the intensity of the rainbow pattern in data. It is only a quantitative analysis and cannot truly reflect the multi-dimensional information of the rainbow pattern such as brightness, azimuth, solid angle, and position. When analyzing the rainbow pattern of the diffraction optical waveguide, the above-mentioned detection system obtains less rainbow pattern information and cannot meet the current analysis needs.

[0005] A Chinese patent with publication number CN718329397A discloses a rainbow pattern detection system for a diffraction optical waveguide, comprising a light source component, a diffraction optical waveguide bearing component, a rainbow pattern image acquisition component and a rainbow pattern image detection component; the light source in the light source component is configured to face the position of the diffraction optical waveguide and the light source can be adjusted to different longitudes and / or latitudes relative to the diffraction optical waveguide; the diffraction optical waveguide bearing component is used to carry the diffraction optical waveguide; the rainbow pattern image acquisition component is located on one side of the position where the center of the eye box of the diffraction optical waveguide is located, and is used to acquire rainbow pattern images of the diffraction optical waveguide at different longitudes and / or latitudes, and transmit them to the rainbow pattern detection image component; the rainbow pattern image detection component determines and obtains multi-dimensional image information of the rainbow pattern based on the acquired rainbow pattern images at different longitudes and / or latitudes.

[0006] The above-mentioned prior art solutions have the following defects: the light source component of the above-mentioned detection system adopts a ring light source to simulate the light emitted by the ambient light source at different longitudes and / or latitudes, and then judges the multi-dimensional image information of the rainbow pattern, such as the brightness, area, intensity distribution, color distribution and azimuth of the rainbow pattern, but it is still limited to simulating the external light in space in one-dimensional direction, and cannot fully reflect all the information of the rainbow pattern. Especially in practical applications, the formation and expression of the rainbow pattern are often affected by many factors, such as the incident angle, wavelength, intensity, etc. of the light source.

[0007] Therefore, the existing rainbow pattern testing device is difficult to fully simulate external light, cannot quantitatively test the specific source direction of external light, cannot quantitatively test the specific angle of light entering the waveguide and the specific angle of stray light entering the human eye, and cannot determine which local area on the waveguide causes the rainbow pattern. For the test of rainbow patterns in diffraction light waveguides, a more comprehensive and accurate testing device is needed to achieve multi-dimensional and high-precision detection and analysis of rainbow patterns. Summary of the invention

[0008] The problem to be solved by the present invention is to provide an AR diffraction optical waveguide rainbow pattern testing device in view of the above-mentioned deficiencies in the prior art. The device simulates the use scenario of the diffraction optical waveguide in a hemispherical space, obtains and analyzes the multi-dimensional information of the rainbow pattern, such as brightness, azimuth, solid angle, position, etc., and has the calibration capability, thereby achieving multi-dimensional and high-precision detection and analysis of the rainbow pattern, and improving the accuracy of repeated measurements.

[0009] The above-mentioned object of the present invention is achieved through the following technical solutions: An AR diffraction optical waveguide rainbow pattern testing device includes a Z-axis hollow rotating stage, an A-axis rotating translation stage, a hollow waveguide carrier, an imaging brightness colorimeter, and a light generating module; wherein, The hollow waveguide carrier is arranged at the rotating end of the Z-axis hollow rotating stage and is used to selectively install the target and the diffraction optical waveguide; The detection end of the imaging colorimeter, the target point of the target, the outcoupling region of the diffraction light waveguide, and the rotation axis of the Z-axis hollow rotating stage are approximately on the same detection axis, and the rotation axis of the A-axis rotating stage intersects the detection axis perpendicularly; The light generating module is installed on the rotating end of the A-axis rotation translation stage in a manner that the light emitting end faces the hollow waveguide carrier, and the light emitting angle of the light generating module on the A-axis rotation translation stage is adjustable, so that the imaging brightness colorimeter can obtain the light transmission image information of the target point under the initial spherical coordinates, and the multi-dimensional image information of the diffraction light waveguide rainbow pattern under different spherical coordinates.

[0010] Furthermore, the relative movement path of the hollow waveguide carrier and the light generating module forms a hemispherical space, with the light output point P (t, a, r) ​​of the light generating module as a point (x, y, z) in the hemispherical space, and the spherical coordinates of the light output point P are 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, 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.

[0011] Furthermore, in the initial spherical coordinates, r=40~60cm, θ=0°, φ=0° are controlled.

[0012] Furthermore, under different spherical coordinates, r=10~100cm, θ=-90~90°, φ=0~360° are controlled.

[0013] Furthermore, the Z-axis hollow rotating stage and the A-axis rotating translation stage each independently have scale lines and a 0° scale line mark under the initial spherical coordinates.

[0014] Furthermore, the Z-axis hollow rotary table is set as a hollow coarse and fine adjustment rotary table PT-SR160. Model: PDV PT-SR160, table size = φ160, rotation axis, coarse adjustment 360°, fine adjustment ±3°, differential head side drive, cross guide rail, 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.

[0015] Furthermore, the A-axis rotation stage is configured as a manual rotation stage RP01. The Thorlabs RP01, with a Ø2" rotation platform, is ideal for larger optomechanical components that require smooth, backlash-free rotation. The stage can be rotated 360° continuously, with 2° graduations on the outer circumference of the rotation platform, and numbers are marked below the graduations corresponding to every 20°. The rotation can be locked by fixing the side set screws using a 5 / 74" (2.0mm) ball screwdriver or hex wrench.

[0016] Furthermore, the target point of the target is set as a transmission area, and the other surfaces are set as reflection areas.

[0017] Furthermore, the multi-dimensional image information includes the brightness, area, intensity distribution, color distribution, azimuth, solid angle, and number of pixels of the rainbow pattern.

[0018] Furthermore, the azimuth angle=n*2π(1-cosθ), wherein n represents the number of pixels of the rainbow pattern.

[0019] Further, the hollow waveguide carrier includes a mounting frame arranged at the rotating end of the Z-axis hollow rotating platform, at least two clips, and a fastener group arranged on the mounting frame and the clips, wherein the at least two clips are arranged at equal intervals along the circumference of the mounting frame opening, and a gap is reserved between the clips and the mounting frame for the target or the diffraction optical waveguide to be tightly plugged in. The fastener group can be set as at least two fastening bolts that are threadedly connected to the mounting frame and the clips and tightly abut against the surface of the clips.

[0020] Furthermore, the imaging brightness colorimeter is set to VA2000-F. Among them, the imaging brightness colorimeter should have the following characteristics: the aperture diaphragm of the detection end lens is located on the object side of the lens, the size of the aperture diaphragm must be equivalent to the size of the human eye pupil, and the reference size is 3~4mm, so that it can capture a picture equivalent to the field of view of the human eye and directly calculate the brightness and color of light at each position in the output picture.

[0021] Furthermore, it also 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 colorimeter is arranged at the moving end of the Z-axis linear slide.

[0022] Furthermore, the Z-axis linear slide is set as a linear translation stage Z-TSX-M1. Among them, Z-TSX-M1 has a 20TPI precision screw drive for coarse / fine positioning. By using the side-mounted positioning screws, the translation stage can be firmly locked in place, and the dovetail sliding bearing can achieve smooth lockable movement with a stroke of more than 1 inch. The hand-tightening screw button can achieve fast positioning and a step sensitivity of 1mm per turn. The translation stage can be adjusted from either side, making it a versatile tool for smooth and fast positioning within the system.

[0023] Furthermore, it also includes an equipment bracket, and the Z-axis linear slide, the Z-axis hollow rotation table and the A-axis rotation displacement table are each independently installed on the equipment bracket.

[0024] Furthermore, it also includes an R-axis linear slide arranged at the rotating end of the A-axis rotation translation stage, an A-axis rotation positioning stage arranged at the moving end of the R-axis linear slide, an A-axis telescopic connecting rod arranged at the rotating end of the A-axis rotation positioning stage, and a pitch adjustment frame arranged at the moving end of the A-axis telescopic connecting rod, and the light generating module is detachably connected to the pitch adjustment frame.

[0025] Furthermore, the R-axis linear slide is configured as a group-configured optical guide OOM-G600 and guide slider OOP60-M. Among them, the optical guide can combine other adjustment frames into a coaxial linear slide through the guide slider, which is particularly suitable for building small optical experiments. The guide slider can be fixed at any position along the optical guide 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.

[0026] Furthermore, the A-axis rotation positioning stage is configured 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 360°, and the outer circumference of the rotation platform is graduated at 2° intervals, with numbers marked below the scale lines corresponding to every 20°. The rotation can be locked by fixing the side set screws using a 5 / 74" (2.0mm) ball screwdriver or hex wrench.

[0027] Furthermore, the A-axis telescopic rod is set as a telescopic rod bracket CAT57-S. Among them, OeabtCAT57-S, L=57mm, twist height 8mm, compatible with Ø72.7mm rod, M6 screw hole.

[0028] Furthermore, the pitch adjustment frame is set as a standard two-axis adjustable frame MK100-A. Among them, OeabtMK100-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, and the lens can be tilted and pitched by adjusting two screws, with a single-axis adjustment amount of ±4°. The adjustment range can be installed in the left or right hand direction, and the frame can be fixed on 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, which enhances stability.

[0029] By adopting the above technical solution, the Z-axis hollow rotating table, the A-axis rotating translation table, the R-axis linear slide, the A-axis rotating positioning table, the A-axis telescopic connecting rod and the pitch adjustment frame are independently mechanically controlled or manually adjusted. In the manual adjustment mode, a scale mark for angle adjustment should be provided to indicate the displacement; During the calibration process, the target is first mounted on the hollow waveguide stage. The target center has a target point for indication, and other areas can reflect light. The target point is approximately coincident with the rotation axis of the Z-axis hollow rotating stage. Then, the light output direction of the light generating module is adjusted by the R-axis linear slide, the A-axis rotating positioning stage, the A-axis telescopic connecting rod and the pitch adjustment frame until the light emitted by the light generating module passes through the target point and is incident on the lens of the imaging colorimeter. This is considered to complete the initial state calibration of the test device, which is of great significance to improving the measurement repeatability. The current position is used as the starting position for quantitative measurement. In the actual detection process, the diffraction light waveguide is first installed on the hollow waveguide carrier, and the center of the human eye observation area of ​​the diffraction light waveguide is made to coincide with the light emitted by the light generating module. The initial light source brightness is recorded using an imaging brightness colorimeter, and then the displacement of the Z-axis hollow rotating stage and the A-axis rotating displacement stage is adjusted to make the light generating module move relative to the hemispherical surface of the diffraction light waveguide, and the multi-dimensional image information in the hemispherical space is recorded using an imaging brightness colorimeter. If there is no rainbow pattern, the image captured by the imaging brightness colorimeter is a completely black image except for the light source. If the captured brightness exceeds the initial light source brightness, it is considered that rainbow pattern stray light appears. At this time, the light output point P (r, t, a) of the light generating module is a point (x, y, z) in the hemispherical space, and the light output point P can also be expressed by spherical coordinates (r, θ, φ), thereby calculating the parameters such as the brightness 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). In this process, the Z-axis hollow rotation table and the A-axis rotation translation table are used to drive the hollow waveguide carrier and the light generating module to simulate the use scenario of the diffraction optical waveguide in the hemispherical space, and the R-axis linear slide, A-axis rotation positioning table, A-axis telescopic rod and pitch adjustment frame are used to provide calibration capabilities, so that the imaging brightness colorimeter can be used to obtain and analyze the multi-dimensional information of the rainbow pattern, such as brightness, chromaticity, azimuth, solid angle, and position, to achieve multi-dimensional and high-precision detection and analysis of the rainbow pattern, as well as to improve the accuracy of repeated measurements.

[0030] In summary, the beneficial technical effects of the present invention are: 1. The Z-axis hollow rotating stage and the A-axis rotating translation stage are used to drive the waveguide carrier and the light generating module to simulate the use scenario of the diffraction optical waveguide in the hemispherical space, and the R-axis linear slide, the A-axis rotating positioning stage, the A-axis telescopic rod and the pitch adjustment frame are used to have the calibration capability, so that the imaging brightness colorimeter can be used to obtain and analyze the multi-dimensional information of the rainbow pattern, such as brightness, chromaticity, azimuth, solid angle, position, etc., to achieve the multi-dimensional and high-precision detection and analysis of the rainbow pattern, and improve the accuracy of repeated measurements; 2. The hemispherical space is formed by the relative movement path of the hollow waveguide carrier and the light generating module, simulating various light incident conditions that the diffraction light waveguide may encounter in actual use, so as to more comprehensively reflect all the information of the rainbow pattern; 3. Using the high-precision detection capability of the imaging brightness colorimeter, it is possible to accurately obtain the multi-dimensional information of the rainbow pattern, such as brightness, chromaticity, azimuth, solid angle, position, etc., providing more comprehensive and accurate data support for the analysis of the rainbow pattern; 4. The present invention also realizes the calibration of the test device by setting the target and the initial spherical coordinates, thereby further improving the accuracy and reliability of the measurement; 5. The Z-axis hollow rotating stage, A-axis rotating translation stage and other components in the present invention are all of high-precision and high-stability models, ensuring the overall performance and stability of the test device; 6. The testing device of the present invention has a simple structure and is easy to operate. It is suitable for rainbow pattern testing of various diffraction optical waveguides and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of an AR diffraction optical waveguide rainbow pattern testing device according to Embodiment 1 of the present invention.

[0032] Figure 2 It is a schematic diagram of the connection relationship between the equipment bracket, the Z-axis linear slide, the Z-axis hollow rotation table and the A-axis rotation translation table of Example 2 of the present invention.

[0033] Figure 3It is a schematic diagram of the connection relationship between the equipment bracket, the Z-axis hollow rotating table and the hollow waveguide carrier of Example 3 of the present invention.

[0034] Figure 4 It is a schematic diagram of the connection relationship between the equipment support, the Z-axis linear slide and the imaging colorimeter of Example 4 of the present invention.

[0035] Figure 5 It is a schematic diagram of the connection relationship between the A-axis rotation translation stage, the R-axis linear slide, the A-axis rotation positioning stage, the A-axis telescopic connecting rod, the pitch adjustment frame and the light generating module of Example 5 of the present invention.

[0036] Figure 6 It is a schematic diagram of the connection relationship between the AR diffraction optical waveguide rainbow pattern testing device and the hemispherical space in Example 6 of the present invention.

[0037] Figure 7 It is a schematic diagram of the use status of the AR diffraction optical waveguide rainbow pattern testing device of Example 6 of the present invention during the calibration process.

[0038] Figure 8 It is a schematic diagram of the use status of the AR diffraction optical waveguide rainbow pattern testing device of Example 6 of the present invention during the rainbow pattern detection process.

[0039] In the figure, 1. Equipment bracket; 2. Z-axis linear slide; 3. Z-axis hollow rotation table; 4. A-axis rotation displacement table; 5. Hollow waveguide carrier; 51. Mounting frame; 52. Clip; 53. Fastener group; 6. Imaging brightness colorimeter; 7. Light generating module; 71. R-axis linear slide; 72. A-axis rotation positioning table; 73. A-axis telescopic connecting rod; 74. Pitch adjustment frame; 8. Target; 9. Diffraction optical waveguide. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Example 1: Reference Figure 1 , is an AR diffraction optical waveguide rainbow pattern testing device disclosed in the present invention, comprising a Z-axis hollow rotating table 3, an A-axis rotating translation table 4, a hollow waveguide carrier 5, an imaging brightness colorimeter 6, and a light generating module 7; wherein, The hollow waveguide carrier 5 is disposed at the rotating end of the Z-axis hollow rotating stage 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 stage 3 are approximately on the same detection axis, and the rotation axis of the A-axis rotating stage 4 intersects the detection axis perpendicularly; The light generating module 7 is installed on the rotating end of the A-axis rotation translation stage 4 in a manner 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 translation stage 4 is adjustable, so that the imaging brightness colorimeter 6 can obtain the light transmission image information of the target 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.

[0042] Example 2: Reference Figure 2 , is an AR diffraction optical waveguide rainbow pattern testing device disclosed in the present invention. The difference from Example 1 is that it also includes an equipment bracket 1 and a Z-axis linear slide 2. The Z-axis linear slide 2, the Z-axis hollow rotation table 3 and the A-axis rotation displacement table 4 are independently installed on the equipment bracket 1.

[0043] 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 colorimeter 6 is set at the moving end of the Z-axis linear slide 2. Among them, Z-TSX-M1 has a 20TPI precision screw drive for coarse / fine positioning. By using the side-mounted positioning screws, the translation stage can be firmly locked in place, and the dovetail sliding bearing can achieve smooth lockable movement with a stroke of more than 1 inch. The hand-tightening screw button can achieve fast positioning and a step sensitivity of 1mm per turn. The translation stage can be adjusted from either side, making it a multi-functional tool for smooth and fast positioning within the system.

[0044] The Z-axis hollow rotary table 3 is set as a hollow type coarse and fine adjustment rotary table PT-SR160. Model: PDV PT-SR160, table size = φ160, rotary axis, coarse adjustment 360°, fine adjustment ±3°, differential head side drive, cross guide rail, aluminum alloy material, black anodized surface treatment, visual reading = 1°, differential head reading ≈ 0.007°, load capacity = 196N / 20.0kg, eccentricity = 20μ, parallelism = 40μ, table runout = 20μ, weight = 1.9kg.

[0045] The A-axis rotation stage 4 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 360°, and the outer circumference of the rotation platform is graduated at 2° intervals, with numbers marked below the scale line corresponding to every 20°. The rotation can be locked by tightening the set screw on the side using a 5 / 74" (2.0mm) ball screwdriver or hex wrench.

[0046] Example 3: Reference Figure 3, is an AR diffraction optical waveguide rainbow pattern testing device disclosed in the present invention, which is different from Example 1 in that the hollow waveguide carrier 5 includes a mounting frame 51 arranged at the rotating end of the Z-axis hollow rotating table 3, a pair of clips 52, and a fastener group 53 arranged on the mounting frame 51 and the clips 52, the pair of clips 52 are arranged at equal intervals along the circumferential direction of the opening of the mounting frame 51, and a gap is reserved between the clips 52 and the mounting frame 51 for the target 8 or the diffraction optical waveguide 9 to be tightly plugged. Among them, the fastener group 53 can be set as two fastening bolts that are threadedly connected to the mounting frame 51 and the clips 52 and tightly abut against the surface of the clips 52.

[0047] Example 4: Reference Figure 4 , is an AR diffraction optical waveguide rainbow pattern testing device disclosed in the present invention, which is different from Example 1 in that the imaging brightness colorimeter 6 is set to VA2000-F. Among them, the imaging brightness colorimeter 6 should have the following characteristics: the aperture diaphragm of the detection end lens is located on the object side of the lens, and the size of the aperture diaphragm needs to be equivalent to the pupil size of the human eye, with a reference size of 3~4mm, so that a picture equivalent to the field of view of the human eye can be captured, and the brightness and chromaticity of light at each position in the output picture can be directly calculated.

[0048] Example 5: Reference Figure 5 , is an AR diffraction optical waveguide rainbow pattern testing device disclosed in the present invention. The difference from Example 1 is that it also includes an R-axis linear slide 71 arranged at the rotating end of the A-axis rotation translation 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] Example 6: Reference Figure 6 , is an AR diffraction optical waveguide rainbow pattern testing device disclosed in the present invention, which is different from Example 1 in that the light source of the light generating 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 accurately 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 scene of daily external light, which is suitable for production quality inspection. The wavelength of the light source can also be replaced according to specific requirements, and can be LED monochromatic light, LED polychromatic light, or a laser of a specific wavelength. The brightness of the light source can be adjusted, and the corresponding light generating module 7 can be used to adjust the light brightness according to the specific requirements of the light source.

[0054] 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 as a point (x, y, z) in the hemispherical space, and the spherical coordinates of the light output point P are 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 optical 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.

[0055] Therefore, in the initial spherical coordinates, r=30cm, θ=0°, φ=0° are controlled. In different spherical coordinates, r=10~100cm, θ=-90~90°, φ=0~360° are controlled, that is, detection is performed in the hemispherical space. The Z-axis hollow rotating stage 3 and the A-axis rotating translation stage 4 each independently have scale lines and a 0° scale mark in the initial spherical coordinates.

[0056] Reference Figure 7 In the calibration process, the target 8 is first mounted on the hollow waveguide carrier 5, and the target point of the target 8 is set as the transmission area, and the other surfaces are set as the reflection area. The target point is approximately coincident with the rotation axis of the Z-axis hollow rotating table 3, and then the light output direction of the light generating module 7 is adjusted by the R-axis linear slide 71, the A-axis rotation positioning table 72, the A-axis telescopic connecting rod 73 and the pitch adjustment frame 74, until the light emitted by the light generating module 7 passes through the target point and is incident on the lens of the imaging brightness colorimeter 6, which is regarded as the completion of the initial state calibration of the test device, which is of great significance to improving the measurement repeatability, and the current position is used as the starting position of the quantitative measurement.

[0057] Reference Figure 8 In the process of rainbow pattern detection, the diffraction light waveguide 9 is first installed on the hollow waveguide carrier 5, and the center of the human eye observation area of ​​the diffraction light waveguide 9 is made to coincide with the light emitted by the light generating module 7. The imaging brightness colorimeter 6 is used to record the initial light source brightness, and then the displacement of the Z-axis hollow rotating stage 3 and the A-axis rotating displacement stage 4 is adjusted to make the light generating module 7 move relative to the hemispherical surface of the diffraction light waveguide 9. The imaging brightness colorimeter 6 is used to record the multi-dimensional image information in the hemispherical space. The multi-dimensional image information includes the brightness, area, intensity distribution, color distribution, etc. of the rainbow pattern. The distribution, azimuth angle (n*2π(1-cosθ)), solid angle, and number of pixels n are calculated. If there is no rainbow pattern, the picture captured by the imaging brightness colorimeter 6 is a completely black picture except for the light source. If the captured brightness exceeds the initial light source brightness, it is regarded as the presence of rainbow stray light. At this time, the light emitting point P (r, t, a) of the light generating module 7 is a point (x, y, z) in the hemispherical space, and the light emitting point P can also be expressed by spherical coordinates (r, θ, φ), thereby calculating parameters such as the brightness chromaticity of the rainbow stray light, the azimuth angle of the rainbow pattern, and the number of rainbow pattern pixels.

[0058] In the above process, the hollow waveguide carrier 5 and the light generating module 7 are driven by the Z-axis hollow rotating table 3 and the A-axis rotating displacement table 4 to simulate the use scenario of the diffraction optical waveguide 9 in the hemispherical space, and assisted by the R-axis linear slide 71, the A-axis rotating positioning table 72, the A-axis telescopic connecting rod 73 and the pitch adjustment frame 74, which have calibration capabilities, so as to obtain and analyze the brightness, chromaticity, azimuth, solid angle, position and other multi-dimensional information of the rainbow pattern through the imaging brightness colorimeter 6, so as to realize the multi-dimensional and high-precision detection and analysis of the rainbow pattern, and improve the accuracy of repeated measurements.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in 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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