AR glasses rainbow pattern measuring device

Abstract

The utility model provides a rainbow pattern measuring device for AR glasses. The rainbow pattern measuring device comprises an illumination unit, a shooting unit, a control unit and a first fixing frame. The first fixing frame is used for placing to-be-tested AR glasses with lenses adopting grating waveguides, the illumination unit comprises a hemispherical supporting shell and light emitting sources, and the light emitting sources are distributed on the inner wall of the whole hemispherical supporting shell in an array arrangement mode. The control unit is electrically connected with the shooting unit and the illumination unit, controls the illumination unit to emit light to the to-be-tested AR glasses lens placed on the first fixing frame according to a set angle range, and controls the shooting unit to shoot an output image corresponding to the light emitted by the illumination unit and received by the grating waveguide in real time. And the control unit receives the output image transmitted by the shooting unit, identifies the output image with the rainbow pattern phenomenon and extracts related parameters of the rainbow pattern. The device can realize rapid, automatic and high-precision measurement of the rainbow lines of the AR glasses.

Description

Technical Field

[0001] This utility model belongs to the field of optical detection technology, specifically relating to a device for measuring rainbow patterns on AR glasses. 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-out light (the solid line in the direction of the human eye in the figure) enters the human eye, 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 human eye in the figure). The superposition of the two parts can realize the function of augmented reality.

[0004] However, when using grating waveguides as the lens solution for AR glasses, users often observe a rainbow effect within the eye box. This effect occurs not only with the image output from the optical engine and coupled through the grating waveguide into the eye box, but also with ambient light diffracting directly into the eye box via the coupled grating. This rainbow effect reduces visual comfort and negatively impacts the user experience. Therefore, precise measurement of the rainbow effect is crucial throughout the entire R&D and production process of AR glasses. The measured rainbow effect data should then be used to optimize the manufacturing process and quality control procedures for the AR glasses.

[0005] The existing AR glasses rainbow phenomenon measurement means mainly relies on manual observation of the AR glasses rainbow phenomenon, and has problems of large subjective error, low detection efficiency, and difficult quantification of data, and is difficult to meet the needs of large-scale production of AR glasses. Therefore, a measurement device capable of quickly, automatically and accurately measuring the AR glasses rainbow phenomenon is urgently needed. Practical new type content

[0006] In order to meet the needs of the prior art, the utility model provides a kind of AR glasses rainbow measurement device.

[0007] The utility model discloses a kind of AR glasses rainbow measurement device, including illumination unit, shooting unit, control unit and first fixed frame;

[0008] The utility model provides a kind of AR glasses rainbow measurement device, including illumination unit, shooting unit, control unit and first fixed frame;

[0009] The first fixed frame is used to place the AR glasses to be measured, and the lens of the AR glasses to be measured uses grating waveguide;

[0010] The illumination unit includes a hemispherical support shell and a light source, and the light source is arranged in an array on the inner wall of the entire hemispherical support shell.

[0011] The control unit is electrically connected with the shooting unit and the illumination unit respectively.

[0012] Further, it further includes a first moving part, and the bottom end of the first fixed frame is connected with the first moving part.

[0013] Further, it further includes a second moving part and a second fixed frame.

[0014] The bottom end of the second fixed frame is connected with the second moving part, and the second fixed frame is used to place the shooting unit.

[0015] Further, the shooting unit uses a human eye-like camera.

[0016] Further, the shooting unit is located at the exit pupil distance of the AR glasses to be measured.

[0017] Further, the center of the hemispherical support shell, the center of the light-sensitive center of the shooting unit and the center of the eyebox of the AR glasses to be measured are located on the same straight line.

[0018] Further, the control unit controls the illumination unit to emit light to the lens of the AR glasses to be measured placed on the first fixed frame according to the set angle range; the control unit controls the shooting unit to shoot the output image corresponding to the emitted light of the grating waveguide receiving the illumination unit in real time; the control unit receives the output image transmitted by the shooting unit, and identifies the output image with rainbow phenomenon and extracts rainbow-related parameters.

[0019] Further, the control unit controls all light emitting sources in the lighting unit to emit light to the to-be-tested AR glasses lens placed on the first fixing frame at the same time.

[0020] Further, the control unit controls each light emitting source in the lighting unit to emit light to the to-be-tested AR glasses lens placed on the first fixing frame according to the set order, and controls a single light emitting source in the lighting unit to emit light to the to-be-tested AR glasses lens placed on the first fixing frame.

[0021] Further, the control unit sets a mark serial number for the output image delivered by the shooting unit, and the mark serial number corresponds to the set order of the light emitting source corresponding to the output image currently delivered by the shooting unit.

[0022] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0023] The utility model provides a kind of AR glasses rainbow stripe measuring device, including lighting unit, shooting unit, control unit and first fixing frame.First fixing frame is used to place lens and adopts grating waveguide to-be-tested AR glasses, lighting unit includes hemispherical form support shell and light emitting source, wherein light emitting source is arrayed arrangement and fills the inner wall of entire hemispherical form support shell.Control unit is electrically connected with shooting unit and lighting unit respectively, control unit controls lighting unit to emit light to the to-be-tested AR glasses lens placed on the first fixing frame according to set angle range, control unit controls shooting unit to shoot the output image corresponding to the emission light of grating waveguide receiving lighting unit in real time, control unit receives the output image delivered by shooting unit, and the output image with rainbow stripe phenomenon is identified and rainbow stripe related parameter is extracted.The AR glasses rainbow stripe measuring device provided by the utility model can realize the measurement of AR glasses rainbow stripe fast, automatically and high precision. ACCURACY OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a basic principle schematic diagram for grating waveguide scheme.

[0026] Figure 2 It is a structural schematic diagram of the AR glasses rainbow stripe measuring device of the utility model.

[0027] Figure 3 Fig. 1 is a structural schematic diagram of a light irradiation unit according to an embodiment of the present application. Figure 2 Fig. 1 is a structural schematic diagram of a light irradiation unit according to an embodiment of the present application.

[0028] Wherein, 1- light machine, 2- waveguide base body, 3- coupling-in grating, 4- coupling-out grating, 5- light irradiation unit, 5-1- hemispherical form support shell, 5-2- light source, 6- shooting unit, 7- first fixed frame, 8- first moving part, 9- second fixed frame, 10- second moving part. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0030] In this document, the terms "first", "second", and other similar terms are not intended to imply any order, quantity, and importance, but are only used to distinguish different elements. In this document, the terms "one", "a", and other similar terms are not intended to mean that there is only one of the described things, but that the description is only directed to one of the described things, which can have one or more. In this document, the terms "include", "contain", and other similar terms are intended to mean logical interrelation, and cannot be regarded as indicating spatial structural relation. For example, "A includes B" is intended to mean that B logically belongs to A, and does not mean that B is located inside A in space. In addition, the meaning of the terms "include", "contain", and other similar terms should be regarded as open, rather than closed. For example, "A includes B" is intended to mean that B belongs to A, but B does not necessarily constitute all of A, and A can also include C, D, E and other elements.

[0031] In this document, the terms "embodiment", "the embodiment", "preferred embodiment", "one embodiment" do not mean that the description is only applicable to one specific embodiment, but that the description can also be applicable to another one or more embodiments. Those skilled in the art should understand that any description made for one embodiment in this document can be replaced, combined, or otherwise combined with the description of another one or more embodiments, and the new embodiments generated by the replacement, combination, or other combination are easily thought by those skilled in the art, and belong to the protection scope of the present application.

[0032] In the description herein, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0033] As Figure 2 The utility model provides a kind of AR glasses rainbow pattern measuring device, including illumination unit 5, shooting unit 6, control unit (not shown in drawing), first fixed frame 7, first moving part 8, second fixed frame 9 and second moving part 10. Among them, first fixed frame 7 is used to place the AR glasses to be measured, and the lens of the AR glasses to be measured adopts grating waveguide, and second fixed frame 9 is used to fix the shooting unit.

[0034] Exemplarily, the illumination unit can include a hemispherical support shell and a light source, and the light source is arranged in an array on the inner wall of the entire hemispherical support shell, so that the light source can emit light to the lens of the AR glasses to be measured placed on the first fixed frame according to a set angle range. Exemplarily, the array arrangement of the light source on the inner wall of the hemispherical support shell is as shown in Figure 3 The inner wall of the hemispherical support shell 5-1 is provided with a light source 5-2 at the top center position of the closed end, and the remaining light sources 5-2 are arranged in a circular array at the inner wall of the hemispherical support shell 5-1 around the light source 5-2 in a progressive hierarchical manner, and the circular array arrangement of the light sources belonging to the lower hierarchical level close to the central light source has a smaller circular diameter than the circular array arrangement of the light sources belonging to the higher hierarchical level away from the central light source.

[0035] The interval distance between adjacent light sources is not specifically limited, and can be set by those skilled in the art as needed. Exemplarily, the light source herein can use existing LED lamp.

[0036] The first moving part can be connected to the bottom end of the first fixed frame. The first moving part drives the first fixed frame to move, so that the AR glasses to be measured arranged on the first fixed frame have a set positional relationship with the illumination unit. Taking the illumination unit including the above-mentioned hemispherical support shell and light source as an example, the center of the eyebox of the AR glasses to be measured arranged on the first fixed frame and the center of the sphere of the hemispherical support shell can be located on the same straight line by moving the first fixed frame through the first moving part.

[0037] The second moving part can be connected to the bottom end of the second fixed frame, and the second moving part drives the second fixed frame to move, so that the shooting unit arranged on the second fixed frame has a set positional relationship with the AR glasses to be measured arranged on the first fixed frame. Exemplarily, the center of the photosensitive center of the shooting unit arranged on the second fixed frame and the center of the eyebox of the AR glasses to be measured arranged on the first fixed frame can be located on the same straight line by moving the second fixed frame through the second moving part.

[0038] Exemplarily, the shooting unit preferably adopts a human-like eye camera, which can use existing equipment. And the shooting unit is preferably located at the exit pupil distance of the AR glasses to be measured.

[0039] The structure of the first fixing frame is not limited, as long as it can fix the AR glasses to be measured. The structure of the second fixing frame is not limited, as long as it can fix the shooting unit. The first moving component can be a conventional device, such as a mechanical arm or a 6-axis adjustment device (including movement and rotation of x, y, and z axes). The second moving component can be a conventional device, such as a mechanical arm or a 6-axis adjustment device (including movement and rotation of x, y, and z axes).

[0040] By locating the center of the spherical support shell, the photosensitive center of the shooting unit, and the eyebox center of the AR glasses to be measured on the same straight line, the measurement accuracy of the rainbow phenomenon of the AR glasses can be greatly improved.

[0041] The control unit is electrically connected to the shooting unit and the light unit.

[0042] The control unit controls the light unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame within a set angle range. For example, the control unit controls the light unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame within a set angle range in the following two ways:

[0043] Method 1: The control unit controls all light sources in the light unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame at the same time.

[0044] Method 2: The control unit controls each light source in the light unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame in a set order, and the control unit controls a single light source in the light unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame at a time.

[0045] The control unit controls the shooting unit to shoot the output image corresponding to the emitted light of the light unit received by the grating waveguide in real time.

[0046] The control unit receives the output image sent by the shooting unit, and sets a mark number for the received output image sent by the shooting unit. The mark number corresponds to the set order of the light source corresponding to the output image currently sent by the shooting unit.

[0047] The control unit identifies the output image with rainbow phenomenon and extracts rainbow-related parameters. For example, the control unit can use a processing algorithm (such as a gabor filter) to detect the output image received from the shooting unit to identify the output image with rainbow phenomenon. Since the output image has a marked serial number, the corresponding light source position of the current output image can be tracked according to the marked serial number of the output image, so that the specific light source and its irradiation angle causing the rainbow phenomenon of the AR glasses can be determined. For the output image with rainbow phenomenon, color analysis, spectral analysis or methods based on machine learning, deep learning, etc. are used to extract the brightness distribution, area range and other parameter information of the rainbow in the output image. In combination with the specific light source and its irradiation angle corresponding to the output image, the brightness distribution and area range of the rainbow under different light irradiation angles of the output image can be analyzed, so that the specific light source and its irradiation angle causing the most significant rainbow phenomenon of the AR glasses can be determined.

[0048] The above control unit can be realized by using existing devices, for example, the control unit can use an existing processor device.

[0049] For example, the AR glasses rainbow measurement device of the utility model measures the AR glasses rainbow measurement process as follows:

[0050] 1. Fix the AR glasses to be measured on the first fixing frame, and adjust the first moving part so that the eyebox center of the AR glasses to be measured arranged on the first fixing frame is located on the same straight line as the center of the spherical support shell.

[0051] 2. Fix the shooting unit on the second fixing frame, and adjust the second moving part so that the shooting unit is located at the exit pupil distance of the AR glasses to be measured, and adjust the second moving part so that the photosensitive center of the shooting unit arranged on the second fixing frame is located on the same straight line as the eyebox center of the AR glasses to be measured arranged on the first fixing frame.

[0052] 3. The control unit controls the light irradiation unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame according to the set angle range, and the control mode has two kinds:

[0053] The control unit controls all light sources in the light irradiation unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame at the same time.

[0054] Or,

[0055] The control unit controls each light source in the light irradiation unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame according to the set order, and the control unit controls a single light source in the light irradiation unit to emit light to the lens of the AR glasses to be measured placed on the first fixing frame at a time.

[0056] 4. The control unit controls the shooting unit to shoot the output image corresponding to the emitted light of the light receiving unit of the grating waveguide in real time and feeds back to the control unit.

[0057] 5. The control unit receives the output image sent by the shooting unit, and the control unit sets a mark serial number for the received output image sent by the shooting unit, and the mark serial number corresponds to the set order of the light emitting source corresponding to the current output image sent by the shooting unit.

[0058] The control unit identifies the output image with the rainbow phenomenon and extracts the rainbow-related parameters. For example, the control unit can use a processing algorithm to detect the received output image sent by the shooting unit to identify the output image with the rainbow phenomenon. Since the output image has a mark serial number, the light emitting source position corresponding to the current output image can be tracked according to the mark serial number of the output image, so that the specific light emitting source and its irradiation angle causing the rainbow phenomenon of the AR glasses can be determined. For the output image with the rainbow phenomenon, color analysis, frequency spectrum analysis or methods based on machine learning, deep learning, etc. are used to extract the brightness distribution, area range and other parameter information of the rainbow in the output image. Combined with the specific light emitting source and its irradiation angle corresponding to the output image, the brightness distribution and area range of the rainbow under different light irradiation angles can be analyzed, so that the specific light emitting source and its irradiation angle causing the most significant rainbow phenomenon of the AR glasses can be determined.

[0059] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above embodiments, the ordinary skilled in the art can still modify or equivalently replace the specific embodiments of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application is within the protection scope of the claims of the present application.

Claims

1. A device for measuring rainbow patterns on AR glasses, characterized in that, Includes a lighting unit, a shooting unit, a control unit, and a first mounting bracket; The first mounting bracket is used to place the AR glasses under test, and the lenses of the AR glasses under test are made of grating waveguides; The illumination unit includes a hemispherical support shell and a light source, and the light source is arranged in an array to cover the inner wall of the entire hemispherical support shell. The control unit is electrically connected to both the shooting unit and the illumination unit.

2. The AR glasses rainbow pattern measuring device according to claim 1, characterized in that, It also includes a first movable component, the bottom end of which is connected to the first movable component.

3. The AR glasses rainbow pattern measuring device according to claim 1, characterized in that, It also includes a second moving part and a second fixed frame; The bottom end of the second fixing frame is connected to the second moving part, and the second fixing frame is used to place the shooting unit.

4. The AR glasses rainbow pattern measuring device according to claim 1 or 3, characterized in that, The imaging unit uses a human eye-like camera.

5. The AR glasses rainbow pattern measuring device according to claim 1, characterized in that, The imaging unit is located at the exit pupil distance of the AR glasses under test.

6. The AR glasses rainbow pattern measuring device according to claim 1, characterized in that, The center of the hemispherical support shell, the photosensitive center of the shooting unit, and the center of the eye box of the AR glasses under test are located on the same straight line.

7. The AR glasses rainbow pattern measuring device according to claim 1, characterized in that, The control unit controls the illumination unit to emit light to the AR glasses lens placed on the first fixed frame according to a set angle range; the control unit controls the shooting unit to shoot the output image corresponding to the emitted light from the illumination unit in real time; the control unit receives the output image sent by the shooting unit, and identifies the output image with rainbow pattern and extracts the rainbow pattern related parameters.

8. The AR glasses rainbow pattern measuring device according to claim 7, characterized in that, The control unit controls all light sources in the illumination unit to simultaneously emit light onto the lenses of the AR glasses to be tested, which are placed on the first fixed frame.

9. The AR glasses rainbow pattern measuring device according to claim 7, characterized in that, The control unit controls each light source in the illumination unit to emit light to the AR glasses lens under test placed on the first fixed frame in a set order, and the control unit controls a single light source in the illumination unit to emit light to the AR glasses lens under test placed on the first fixed frame.

10. The AR glasses rainbow pattern measuring device according to claim 9, characterized in that, The control unit sets a marker number for the output image received from the shooting unit. The marker number corresponds to the set order of the light source corresponding to the current output image sent by the shooting unit.

Images