CN114993616A - System, method and device for testing diffraction light waveguide - Google Patents

Abstract

Embodiments of the present application provide a system, method and apparatus for testing a diffractive light waveguide. The diffractive light waveguide includes a light-in area and a light-out area, the test system includes: an optical engine for providing a plurality of test images and projecting the test images to the light incoupling region; wherein each of said test images corresponds to an optical property of said diffractive optical waveguide; the test camera is used for acquiring an imaging image and transmitting the imaging image to the detection module; wherein the imaging image is an image of the test image entering the diffractive light waveguide from the light coupling-in area, and transmitted to the light coupling-out area and emitted; a detection module for determining the optical performance of the diffractive light waveguide based on the received imaged image.

Description

A testing system, method and device for diffractive optical waveguide

technical field

The embodiments of the present application relate to the technical field of diffractive optical waveguides, and more particularly, the embodiments of the present application relate to a testing system, method and device for diffractive optical waveguides.

Background technique

Augmented display technology is a technology that projects virtual images into the real world to enhance user perception, and it has important applications in many fields. In the enhanced display technology, the diffractive optical waveguide is a key component, and its function is to transmit the virtual avatar through the diffractive optical waveguide and project it to the user's eyes to form a virtual image. The basic function of the diffractive optical waveguide is to realize low-loss and low-distortion transmission of light waves, and the optical performance of the diffractive optical waveguide is an index to detect the transmission performance of the diffracted optical waveguide.

At present, in the optical inspection of diffractive optical waveguides, each optical test item generally has its own test device or system. During production testing, the product needs to be frequently transferred between different test stations, which undoubtedly increases the test cost. And increase the probability of product damage during the transfer process.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a new technical solution for a testing system, method and device for diffractive optical waveguides.

In a first aspect, the present application provides a testing system for diffractive optical waveguides. The diffractive optical waveguide includes a light coupling-in region and a light coupling-out region, and the testing system includes:

an optical engine for providing a plurality of test images and projecting the test images to the light coupling region; wherein each of the test images corresponds to an optical property of the diffractive optical waveguide;

a test camera for acquiring an imaging image and transmitting the imaging image to the detection module; wherein the imaging image is that the test image enters the diffractive optical waveguide from the light coupling region, and is transmitted to the light out-coupling and outgoing images;

The detection module is used for determining the optical performance of the diffractive optical waveguide according to the received imaging image.

Optionally, the test system further includes a first position adjustment component, and the first position adjustment component drives the test camera to move, so that the test camera acquires an imaging image group;

The detection module determines a data set of optical properties of the diffractive optical waveguide according to the received imaging image set.

Optionally, the first position adjustment component is used to adjust the position of the test camera in the first direction to determine the optical performance corresponding to the diffractive optical waveguide in different eye movement ranges;

The first direction is a direction parallel to the extending direction of the diffractive optical waveguide.

Optionally, the first position adjustment component is used to adjust the position of the test camera in the second direction to determine the optical performance of the diffractive optical waveguide corresponding to different exit pupil positions;

The second direction is a direction perpendicular to the extending direction of the diffractive optical waveguide.

Optionally, the test system further includes a second position adjustment component, and the second position adjustment component drives the optical engine to move, so that the position of the exit pupil of the optical engine corresponds to the light coupling area.

Optionally, the test system further includes a first sliding swing table, and the first sliding swing table drives the optical engine to swing in a first direction, so that the test image of the optical engine is incident on the diffractive optical waveguide. light coupling area;

The first direction is a direction parallel to the extending direction of the diffractive optical waveguide.

Optionally, the test system further includes a vision camera and a controller, the vision camera is used to obtain the exit pupil position of the optical engine and the light coupling-in area position, and the exit pupil position of the optical engine is obtained. and outputting the position of the light coupling region to the controller;

The controller is used for acquiring the exit pupil position of the optical engine according to the vision camera, and driving the second position adjustment component to work, so that the exit pupil position of the optical engine reaches a position corresponding to the light coupling area.

Optionally, the optical engine includes an optical engine body and a turning prism, and the turning prism is located at an exit pupil position of the optical engine body to change the light exit direction of the optical engine.

Optionally, the optical properties of the test image corresponding to the diffractive optical waveguide include: one of contrast, optical efficiency, modulation transfer function, distortion and chromatic aberration.

Optionally, the test image has a test image in a first state and a test image in a second state, wherein the test image in the second state is rotated 90° relative to the test image in the first state;

The test image of the first state is applied to a top-projected diffractive optical waveguide;

The test image of the second state is applied to a side projected diffractive optical waveguide.

In a second aspect, a method for testing a diffractive optical waveguide is provided. The diffractive optical waveguide includes a light coupling-in region and a light coupling-out region; the method includes:

providing a plurality of test images by an optical engine and projecting the test images to the light coupling region; wherein each of the test images corresponds to an optical property of the diffractive optical waveguide;

acquiring an imaging image, and transmitting the imaging image to the detection module; wherein the imaging image is the test image entering the diffractive optical waveguide from the light coupling region, and transmitting to the light coupling region and exiting Image;

Based on the received imaging images, the optical properties of the diffractive optical waveguide are determined.

In a third aspect, a testing device for diffractive optical waveguides is provided. The diffractive optical waveguide includes a light coupling-in region and a light coupling-out region; the device includes:

a control module for providing a plurality of test images through an optical engine, and projecting the test images to the light coupling region; wherein each of the test images corresponds to an optical property of the diffractive optical waveguide;

an acquisition module, configured to acquire an imaging image and transmit the imaging image to a detection module; wherein the imaging image is the test image entering the diffractive optical waveguide from the light coupling region and transmitted to the light out-coupling and outgoing images;

The detection module is used for determining the optical performance of the diffractive optical waveguide according to the received imaging image.

In the technical solutions provided in the embodiments of the present application, the optical engine is controlled to project a test image to the diffractive optical waveguide, wherein each test image corresponds to an optical performance of the diffractive optical waveguide, so the multiple test images provided by the optical engine correspond to the diffractive optical waveguide. Many different optical properties of optical waveguides. After the optical engine projects the test image to the diffractive optical waveguide, the test camera can obtain the imaging image corresponding to the test image, and transmit the imaging image to the detection module. The detection module can obtain the corresponding diffracted optical waveguide according to the received imaging image. optical performance.

In the embodiment of the present application, since the optical engine provides multiple test images, the detection module can receive different imaging images according to the test images projected by the optical engine, and then determine different optical properties of the diffractive optical waveguide according to the different imaging images. performance. Therefore, the test system of the embodiment of the present application can meet the purpose of measuring different optical properties of diffractive optical waveguides, and avoid the problem that diffracted optical waveguides need to be transferred between test stations that cannot be used when measuring different optical properties.

Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of this specification and, together with the description, serve to explain the principles of this specification.

FIG. 1 is a structural diagram 1 of a diffractive optical waveguide testing system provided by an embodiment of the present application.

FIG. 2 shows a second structural diagram of the diffractive optical waveguide testing system provided by the embodiment of the present application.

Figure 3 shows the test image projected by the optical engine.

Figure 4 shows a schematic diagram of a diffractive optical waveguide applied to top projection.

FIG. 5 is a schematic diagram of the application of the diffractive optical waveguide to the side projection.

FIG. 6 is a schematic flowchart of a method for testing a diffractive optical waveguide according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a hardware structure of a testing device for diffractive optical waveguides according to an embodiment of the present application.

Description of reference numbers:

1. Diffractive optical waveguide; 10. Diffractive optical waveguide body; 11. Light coupling in area; 12. Light coupling out area;

2. Optical engine; 21. Optical engine body; 22. Turning prism;

3. Test the camera;

41. The first position adjustment assembly; 411, the electric guide rail; 412, the electric lifting platform; 42, the second position adjustment assembly;

51. The first sliding table; 52. The second sliding table;

6. Vision camera;

7. Test image; 71. Opto-mechanical chart; 72. Test chart;

1200, a testing device; 1201, a control module; 1202, an acquisition module; 1203, a detection module.

Detailed ways

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques and devices should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

The AR optical display system is composed of micro-display and optical components. Common optical components include prisms, free-form surfaces, diffractive optical waveguides, etc. Among these optical elements, the diffractive optical waveguide includes a transmissive diffractive optical waveguide and a reflective diffractive optical waveguide, wherein the diffractive optical waveguide testing system provided in the embodiments of the present application can be applied to the transmissive diffractive optical waveguide and the reflective diffractive optical waveguide.

The diffractive optical waveguide includes a light coupling-in area and a light coupling-out area, in which the incident light enters the diffractive optical waveguide from the light coupling-in area, and after the transmission of the diffractive optical waveguide, the light exits from the light coupling-out area, wherein the optical performance of the diffractive optical waveguide It determines the quality of the output image of the AR optical display system. Based on this, the quality of the diffractive optical waveguide can be detected by testing different optical properties of the diffractive optical waveguide.

In the prior art, when performing optical inspection on diffractive optical waveguides, each optical test item (ie the optical performance of each diffractive optical waveguide) has its own corresponding test device or system, that is, after completing an optical test item After the inspection, the test device needs to be replaced to carry out the inspection of another optical test item. Therefore, when the diffractive optical waveguide is optically inspected, the diffractive optical waveguide needs to be frequently transferred between different testing devices, which increases the testing cost and increases the probability of the diffracted optical waveguide being damaged during the transfer process.

In order to solve the above problems, the embodiments of the present disclosure propose a testing system, method and device for diffractive optical waveguides, which control the optical engine to project different test images to the diffractive optical waveguide, and realize different optical properties of the diffractive optical waveguide through a testing system. Each test image corresponds to one optical property of the diffractive optical waveguide, which satisfies the purpose of detecting different optical properties with one testing system, reduces the testing cost, and avoids the phenomenon of damage to the diffractive optical waveguide during the transfer process.

Hereinafter, various embodiments and examples according to the present disclosure will be described with reference to the accompanying drawings.

<System Example>

Referring to FIG. 1 and FIG. 2 , an embodiment of the present disclosure provides a testing system for a diffractive optical waveguide 1 . The system is used to detect different optical properties of the diffractive optical waveguide 1 . 1 , a schematic diagram of the test system applied to the reflective diffractive optical waveguide 1 , and FIG. 2 is a schematic diagram of the test system applied to the transmissive diffractive optical waveguide 1 .

As shown in FIG. 1 and FIG. 2 , the testing system of the diffractive optical waveguide 1 provided by the embodiment of the present disclosure may include an optical engine 2 , a testing camera 3 and a detection module (not shown in the drawings).

The optical engine 2 is used to provide a plurality of test images 7 and project the test images 7 to the light coupling area 11 ; wherein each of the test images 7 corresponds to an optical property of the diffractive optical waveguide 1 .

The test camera 3 is used for acquiring an imaging image, and transmitting the imaging image to the detection module; wherein the imaging image is the test image 7 entering the diffractive optical waveguide 1 from the light coupling area 11, and transmitting the imaging image 7 to the light out-coupling area 12 and outgoing images.

The detection module is used for determining the optical performance of the diffractive optical waveguide 1 according to the received imaging image.

In this embodiment, the optical engine 2 includes an illumination light source, a display chip and an optical imaging system. The illumination light source may be an LED light source, the display chip may be a DMD digital micromirror element, LCOS, etc., and the optical imaging system may be a projection lens. In a specific embodiment, the optical engine 2 may be a light projector.

The optical engine 2 is used to provide multiple test images 7 , for example, the multiple test images 7 are burned in the optical engine 2 . In the case where the optical engine 2 is responsive to an external signal, the optical engine 2 can project the test image 7 to the light coupling region 11 . For example, the user may control the optical engine 2 through components such as a remote control to project the test image 7 to the light coupling area 11 .

In this embodiment, multiple test images 7 are burned in the optical engine 2 , so that the optical engine 2 can provide multiple test images 7 , and the test system provided by the embodiment of the present application can detect multiple optical properties of the diffractive optical waveguide 1 . The burning of images in the optical engine 2 is known to those skilled in the art, so that the optical engine 2 can project images for the user to watch, and in this application, multiple test images 7 are burned in the optical engine 2, Used to detect the optical performance of the optical engine 2.

In this embodiment, the optical engine 2 is capable of providing a plurality of test images 7 and projecting the test images 7 to the light coupling region 11 . For example, the installation position of the optical engine 2 corresponds to the light coupling region 11 of the diffractive optical waveguide 1 , and can project the test image 7 to the light coupling region 11 . Each of the test images 7 corresponds to an optical property of the diffractive optical waveguide 1 . When the optical engine 2 provides a plurality of test images 7 , the plurality of test images 7 correspond to different optical properties of the diffractive optical waveguide 1 . The test image 7 may include a checkerboard image, or a crosshair image, an RGB solid color image, or a nine-dot image, and the like. The test images 7 are all test charts 72 commonly used in the optical field.

In a specific embodiment, the optical properties of the optical engine 2 may be contrast and modulation transfer function (MTF), distortion and chromatic aberration, and the like. When the contrast of the optical engine 2 is detected, the optical engine 2 projects a checkerboard image to the diffractive optical waveguide 1 . When the modulation transfer function of the optical engine 2 is detected, the optical engine 2 projects a crosshair image to the diffractive optical waveguide 1 . When the distortion of the optical engine 2 is detected, the optical engine 2 projects a nine-dot image to the diffractive optical waveguide 1 .

In this embodiment, the test camera 3 is used to acquire an imaging image and transmit the imaging image to the detection module. The imaging image is an image of the test image 7 entering the diffractive optical waveguide 1 from the light coupling region 11 , and being transmitted to the light coupling region 12 through total reflection.

Specifically, the test camera 3 corresponds to the light coupling-out area 12 of the diffractive optical waveguide 1, and the test camera 3 can receive and display the imaging image, and transmit the imaging image to the detection module, so that the detection module can detect the imaging image.

In a specific embodiment, the optical engine 2 can project a plurality of detection images to the diffractive optical waveguide 1 in sequence, and the test camera 3 sequentially acquires a plurality of imaging images correspondingly. The plurality of imaged images are transmitted to the detection module one by one in the projection order. The detection module detects and detects each imaging image correspondingly.

Or in another specific embodiment, the optical engine 2 can project a plurality of detection images to the diffractive optical waveguide 1 in sequence, and the test camera 3 sequentially acquires a plurality of imaging images correspondingly. The multiple imaging images are all transmitted to the detection module at one time, and the detection module detects and detects each imaging image correspondingly according to the time when the test camera 3 acquires the imaging images.

In this embodiment, the detection module is used to determine the optical performance of the diffractive optical waveguide 1 according to the received imaging image.

It can be understood that the detection module can be used to calculate the image information in the imaging image to determine the optical performance of the diffractive optical waveguide 1 . In a specific embodiment, when detecting the contrast of the diffractive optical waveguide 1 , the detection module is used to calculate the ratio of the brightness value of the white checkerboard to the brightness value of the black checkerboard in the imaging image to determine the contrast of the diffractive optical waveguide 1 . Or in another specific embodiment, when detecting the optical efficiency of the diffractive optical waveguide 1, the optical efficiency of the diffractive optical waveguide 1 is determined according to the ratio of the luminous flux value of the optical engine 2 to the brightness values of the 35 target points in the imaging image. efficiency, etc.

According to the embodiment of the present application, by controlling the optical engine 2 to project test images 7 to the diffractive optical waveguide 1, each test image 7 corresponds to an optical property of the diffractive optical waveguide 1, so the multiple test images 7 provided by the optical engine 2, A number of different optical properties of the diffractive optical waveguide 1 are corresponding. After the optical engine 2 projects the test image 7 to the diffractive optical waveguide 1, the test camera 3 can obtain the imaging image corresponding to the test image 7, and transmit the imaging image to the detection module, and the detection module can obtain the corresponding imaging image according to the received imaging image. The optical properties of diffractive optical waveguide 1.

In the embodiment of the present application, since the optical engine 2 provides a plurality of test images 7, the detection module can receive different imaging images according to the test images 7 projected by the optical engine 2, and then determine the diffracted light according to the different imaging images Different optical properties of waveguide 1. Therefore, the test system of the embodiment of the present application can meet the purpose of measuring different optical properties of the diffractive optical waveguide 1, and avoid the problem that the diffractive optical waveguide 1 needs to be transferred between test stations that cannot be used when measuring different optical properties.

In one embodiment, as shown in FIG. 1 and FIG. 2 , the test system further includes a first position adjustment assembly 41 , and the first position adjustment assembly 41 drives the test camera 3 to move, so that the test camera 3 Acquire a set of imaging images.

The detection module determines a data set of optical properties of the diffractive optical waveguide 1 according to the received imaging image set.

In this embodiment, the test system further includes a first position adjustment assembly, wherein the first position adjustment assembly 41 is used to drive the test camera 3 to move. That is, in this embodiment, in the light coupling-out area 12 of the diffractive optical waveguide 1, the position of the test camera 3 is movable, not fixed. For example, referring to FIG. 1 , the test camera 3 can move in a three-dimensional space (a three-dimensional space formed by arrows a, b, and c).

Since the position of the test camera 3 is movable, that is, the test position of the test camera 3 is adjustable. The test camera 3 can acquire imaging images at different positions, and the imaging images at different positions constitute an imaging image group.

The detection camera transmits the imaging image group acquired by it to the detection module, so that the detection module calculates the imaging image group to obtain the optical performance corresponding to the diffracted optical waveguide 1 at different positions of the test camera 3 .

In a specific embodiment, in the imaging image group acquired by the test camera 3 , the imaging images in the imaging image group are all from the same test image 7 .

For example, the optical engine 2 projects a first test image 7 (such as a checkerboard) into the diffractive optical waveguide 1, and the test camera 3 is arranged on the first position adjustment component 41. At time T1, the test camera 3 is located at the position A, and the test camera 3 Acquire the imaging image a; after the test camera 3 acquires the imaging image a, the first position adjustment component 41 drives the test camera 3 to move to the position B, and at this moment T2, the test camera 3 acquires the imaging image b; when the test camera 3 acquires the imaging image After image b, the first position adjustment component drives the test camera 3 to move to the position C. At this time, at time T3, the test camera 3 acquires the imaging image c. Of course, the test camera 3 can acquire more imaging images, which are not listed in this embodiment. The A position, the B position and the C position are different positions, and the A position, the B position and the C position are not shown in the diagram.

In this embodiment, the imaging image a, the imaging image b and the imaging image c constitute an imaging image group, and the imaging image group composed of the imaging image a, the imaging image b and the imaging image c is transmitted to the detection module, and the detection module analyzes the imaging image a is analyzed and calculated to obtain the optical performance (contrast) at position A; the detection module analyzes and calculates the imaging image b to obtain the optical performance (contrast) at position B; the detection module analyzes and calculates the imaging image c, The optical performance (contrast) at position C is obtained. At this time, the optical performance (contrast) at position A, the optical performance (contrast) at position B, and the optical performance (contrast) at position C constitute the optical performance of diffractive optical waveguide 1. A dataset of properties (ie, a dataset of contrasts).

In addition, the optical engine 2 can project a second test image 7 (for example, a crosshair) into the diffractive optical waveguide 1, and finally determine the data set of the optical performance of the diffractive optical waveguide 1 (that is, determine the data of the MTF of the diffractive optical waveguide 1). Group).

In an optional embodiment, the data sets of different optical properties acquired in this embodiment can be used as a standard database to be applied to the comparison of the optical properties of different diffractive optical waveguides 1 .

In another specific embodiment, in the imaging image group acquired by the test camera 3 , the imaging images in the imaging image group are from different test images 7 .

For example, the test camera 3 is set on the first position adjustment component 41. At time T1, the test camera 3 is located at the position A, the optical engine 2 projects the first test image 7 (checkerboard), and the test camera 3 obtains the imaging image a; After the camera 3 acquires the imaging image a, the first position adjustment component 41 drives the test camera 3 to move to the position B. At this time, at time T2, the optical engine 2 projects the second intermediate test image 7 (crosshair), and the test camera 3 acquires the image Image b; after the test camera 3 acquires the imaging image b, the first position adjustment and adjustment component drives the test camera 3 to move to the position C, and at this moment T3, the optical engine 2 projects the third test image 7 (pure RGB image), The test camera 3 acquires the imaging image c. Of course, the test camera 3 may acquire more different imaging images, which are not listed in this embodiment.

In this embodiment, the imaging image a, the imaging image b and the imaging image c constitute an imaging image group, and the imaging image group composed of the imaging image a, the imaging image b and the imaging image c is transmitted to the detection module, and the detection module analyzes the imaging image a is analyzed and calculated to obtain the optical performance (contrast) at position A; the detection module analyzes and calculates the imaging image b to obtain the optical performance (MTF) at position B; the detection module analyzes and calculates the imaging image c, The optical performance (optical efficiency) at the C position is obtained. At this time, the optical performance at the A position (contrast), the optical performance at the B position (MTF), and the optical performance at the C position (optical efficiency) constitute the diffractive optical waveguide 1 The data set of the optical properties (that is, at different positions, correspondingly different optical properties of the data set).

In this embodiment, the optical performance corresponding to the diffractive optical waveguide 1 when the detection cameras are located at different positions can be detected by the testing system. For example, when the detection cameras are located at different positions, they may correspond to different positions of the eye movement range and different exit pupil positions.

In an optional embodiment, the first position adjustment assembly 41 may include an electric guide rail 411 and an electric lifting platform 412 . The electric guide rail 411 and the electric lift table 412 are combined together, so that the test camera 3 can move in the three-dimensional space (the three-dimensional space of the arrow a, arrow b and arrow c process). ; In addition, the first position adjustment component 41 may be a three-axis adjustment mechanism, as long as the position of the test camera 3 can be changed.

In one embodiment, as shown in FIG. 1 and FIG. 2 , the first position adjustment component 41 is used to adjust the position of the test camera 3 in the first direction and the third direction to determine the different eye movement ranges. position, the optical properties of the diffractive optical waveguide 1.

The first direction is a direction parallel to the extending direction of the diffractive optical waveguide 1 , and the third direction is a direction parallel to the extending direction of the extending diffractive optical waveguide 1 .

In this embodiment, the eye movement range (Eyebox) refers to the range in which the pupil can obtain complete image information.

Movement space. If the pupil falls outside the eye movement area, the outgoing light cannot enter the eye, and the displayed image cannot be observed.

In this embodiment, by adjusting the position of the test camera 3 in the two-dimensional space (arrow a (the first direction shown) and arrow c (the third direction shown)), the test requirements of different Eyebox positions can be met.

Specifically, the optical engine 2 projects a test image 7 into the diffractive optical waveguide 1 . The test image 7 is transmitted through the diffractive optical waveguide 1, and an imaging image is emitted. Wherein, the test camera 3 is located at the eye movement range position a, and the test camera 3 obtains the imaging image A; when the test camera 3 obtains the imaging image A of the eye movement range a, the test position of the test camera 3 is changed, so that the test camera 3 is located at the eye movement range a. Range position b, at this time, the test camera 3 obtains the imaging image B; in addition, the test camera 3 can be adjusted to be located at any position in the eye movement range area, so that the test camera 3 obtains imaging images at different eye movement range positions.

The test camera 3 transmits both the imaging image A and the imaging image B to the detection module, and the detection module calculates and analyzes the imaging image A and the imaging image B respectively, so as to calculate the optical performance at the position a of the eye movement range correspondingly, and Calculate the optical performance at position b of the eye movement range.

Therefore, in this embodiment, the optical performance at different positions of the Eyebox can be detected by the testing system provided in this embodiment.

In an optional embodiment, as shown in FIG. 1 and FIG. 2 , the first position adjustment component 41 may be an electric guide rail 411 .

In one embodiment, referring to FIG. 1 and FIG. 2 , the first position adjustment component 41 is used to adjust the position of the test camera 3 in the second direction to determine the diffractive optical waveguide 1 at different exit pupils position-corresponding optical properties.

The second direction is a direction perpendicular to the extending direction of the diffractive optical waveguide 1 .

In this embodiment, where the exit pupil position (Eye relief) is the distance between the detection camera and the diffractive optical waveguide 1 in the second direction, and the distance between the detection camera and the diffractive optical waveguide 1 in the second direction may indirectly correspond to different viewing angles.

In this embodiment, by adjusting the position of the test camera 3 in the one-dimensional space (arrow b (the second direction shown)), that is, by adjusting the distance between the test camera and the diffractive optical waveguide 1 in the second direction, it is possible to Meet the testing needs of different Eyeelief.

Specifically, the optical engine 2 projects a test image 7 into the diffractive optical waveguide 1 . The test image 7 is transmitted through the diffractive optical waveguide 1, and an imaging image is emitted. The test camera 3 is located at the exit pupil position a (the distance between the detection camera and the diffractive optical waveguide 1 in the second direction is a), and the test camera 3 acquires the imaging image A; when the test camera 3 acquires the imaging image A at the exit pupil position a , change the test position of the test camera 3 so that the test camera 3 is located at the exit pupil position b (the distance between the detection camera and the diffractive optical waveguide 1 in the second direction is b, and the distance a is smaller than the distance b). At this time, the test camera 3 obtains Imaging image B; in addition, the test camera 3 can be adjusted to be located at any position in the exit pupil area, so that the test camera 3 can obtain imaging images at different exit pupil positions.

The test camera 3 transmits both the imaging image A and the imaging image B to the detection module, and the detection module calculates and analyzes the output imaging image A and the imaging image B respectively, to correspondingly calculate the optical performance at the exit pupil position a, and calculate the Optical performance at exit pupil position b.

Therefore, in this embodiment, through the testing system provided in this embodiment, the optical performance at different Eye relief positions can be detected.

In an optional embodiment, as shown in FIG. 1 and FIG. 2 , the first position adjustment assembly 41 may be an electric lift table 412 .

In one embodiment, as shown in FIG. 1 and FIG. 2 , the test system further includes a second position adjustment assembly 42 , and the second position adjustment assembly 42 drives the optical engine 2 to move, so that the optical engine The exit pupil position of 2 corresponds to the light coupling region 11 .

In this embodiment, the testing system further includes a second position adjustment assembly, wherein the second position adjustment assembly 42 is used to drive the optical engine 2 to move. That is, in this embodiment, in the light coupling region 11 of the diffractive optical waveguide 1, the position of the optical engine 2 is movable, not fixed. For example, with reference to FIG. 1 , the optical engine 2 can move in one dimension (arrow b).

Specifically, in the test of the diffractive optical waveguide 1, the diffractive optical waveguide 1 is fixedly set. For example, the diffractive optical waveguide 1 may be arranged on the product-to-be-measured stage.

Referring to FIG. 1 , the second position adjustment assembly 42 moves the optical engine 2 to the first position, the optical engine 2 is in the first position, the exit pupil of the optical engine 2 is located below the diffractive optical waveguide 1, and the second position adjustment assembly 42 makes the position of the exit pupil of the optical engine 2 correspond to the light coupling-out region 12 of the diffractive optical waveguide 1 , so that the test image 7 of the optical engine 2 is just incident into the light coupling-in region 11 .

In addition, in this embodiment, the position of the exit pupil of the optical engine 2 is located below the diffractive optical waveguide 1 , and the test system can be applied to the test of the reflective diffractive optical waveguide 1 .

Referring to FIG. 2 , the second position adjustment assembly 42 electrically moves the optical engine 2 to the second position, the optical engine 2 is in the second position, the exit pupil of the optical engine 2 is located above the diffractive optical waveguide 1, and the second position adjustment assembly 42 makes the position of the exit pupil of the optical engine 2 correspond to the light coupling-out region 12 of the diffractive optical waveguide 1 , so that the test image 7 of the optical engine 2 is just incident into the light coupling-in region 11 .

In addition, in this embodiment, the position of the exit pupil of the optical engine 2 is located above the diffractive optical waveguide 1 , and the test system can be applied to the test of the transmissive diffractive optical waveguide 1 .

Therefore, in this embodiment, the test system includes a second position adjustment assembly 42 , wherein the second position adjustment assembly 42 drives the optical engine 2 to guide, and changes the position of the exit pupil of the optical engine 2 .

In an optional embodiment, the second position adjustment assembly 42 may be an electric lift table 412 .

In one embodiment, as shown in FIG. 1 and FIG. 2 , the testing system further includes a first sliding swing table 51 , and the first sliding swing table 51 drives the optical engine 2 to swing in a first direction, so as to The test image 7 of the optical engine 2 is incident on the light coupling region 11 of the diffractive optical waveguide 1 .

The first direction is a direction parallel to the extending direction of the diffractive optical waveguide 1 .

In this embodiment, the testing system further includes a first sliding swing table 51, and the first sliding swing table 51 can drive the optical engine 2 to swing up and down along the first direction.

Specifically, in general, the requirement of the diffractive optical waveguide 1 for the incident light is that the incident light is perpendicular to the diffracted optical waveguide 1 , that is, the incident light directly enters the diffracted optical waveguide 1 . That is, the incident angle of the incident light is 90°.

But there are also some diffractive optical waveguides 1 , when the incident angle of the incident light (test image 7 ) is 90°, the incident light cannot be projected to the light coupling area 11 . At this time, the incident angle of the incident light needs to be changed, so that the incident light can be incident on the light coupling region 11 of the diffractive optical waveguide 1 .

In this embodiment, by setting the first sliding swing table 51, the first sliding swing table 51 drives the optical engine 2 to swing in the first direction. At this time, the incident angle of the test image 7 projected by the optical engine 2 can be adjusted to meet the Testing of different types of diffractive optical waveguides 1.

In an embodiment, generally, the requirement of the diffractive optical waveguide 1 for the outgoing light is that the outgoing light is perpendicular to the diffracted optical waveguide 1 , that is, the outgoing light directly enters the diffracted optical waveguide 1 . That is, the outgoing angle of the outgoing light is 90°.

However, when the incident angle of the incident light in the diffractive optical waveguide 1 is not incident at 90°, when the light exits, it is also not at 90°. In order to enable the test camera 3 to obtain a complete imaging image, correspondingly, the test system further includes a second sliding pendulum 52 . The second sliding pendulum 52 is the same as the first sliding pendulum 51 and can swing in the first direction. . The second sliding swing table 52 drives the test camera 3 to swing in the first direction, so that the test camera 3 can obtain the imaging image; in addition, the second sliding swing table 52 can realize the swing of the test camera 3 in the first direction, so as to realize the Optical testing of multiple viewing angles.

In one embodiment, as shown in FIG. 1 and FIG. 2 , the testing system further includes a vision camera 6 and a controller (not shown in the figure); the vision camera 6 is used to obtain the output of the optical engine 2 . pupil position and the position of the light coupling-in area 11, and output the exit pupil position of the optical engine 2 and the position of the light coupling-in area 11 to the controller;

The controller is used to obtain the exit pupil position of the optical engine 2 according to the vision camera 6, and drive the second position adjustment component 42 and/or the first sliding swing table 51 to work, so that the exit pupil position of the optical engine 2 reaches the same level as that of the optical engine 2. The position corresponding to the light coupling region 11 is described.

In this embodiment, the controller is connected with the vision camera 6 , the second position adjustment assembly 42 and the first sliding swing table 51 . The vision camera 6 can monitor the position of the light coupling region 11 and the position of the exit pupil of the optical engine 2 in real time. The vision camera 6 outputs the detected position information of the light coupling region 11 and the position information of the exit pupil of the optical engine 2 to the controller.

According to the position information of the light coupling area 11 and the exit pupil position information of the optical engine 2, the controller can determine the position of the exit pupil of the optical engine 2, which is deviated from the position of the optical coupling area, and then drives the second position adjustment component 42 and/or The first sliding table 51 makes the exit pupil of the optical engine 2 reach the position corresponding to the light coupling area 11 , so that the test image 7 projected by the optical engine 2 can just enter the light coupling area 11 .

In one embodiment, as shown in FIGS. 1 and 2 , the optical engine 2 includes an optical engine body 21 and a turning prism 22 , and the turning prism 22 is located at the exit pupil position of the optical engine body 21 to change all Describe the light-emitting direction of the optical engine 2 .

In this embodiment, the optical engine 2 includes an optical engine body 21 (including an illumination light source, a display chip and an optical imaging system) and a turning prism 22 . The turning prism 22 is located at the exit pupil position of the optical engine body 21 to change the light exit direction of the optical engine 2 as a whole to meet the testing requirements for the transmissive diffractive optical waveguide 1 and the reflective diffractive optical waveguide 1 .

For example, as shown in FIG. 1 , the exit pupil position of the optical engine body 21 is located below the light coupling region 11 of the diffractive optical waveguide 1 , and a turning prism 22 is set at the exit pupil position of the optical engine body 21 , so that the light projected by the optical engine 2 The test image 7 can be reflected by the light in-coupling region 11 into the diffractive optical waveguide body 10 (for example, the diffractive optical waveguide 1 includes the diffractive optical waveguide body 10 , the light coupling-in region 11 and the light coupling-out region 12 ).

For example, as shown in FIG. 2 , the position of the exit pupil of the optical engine body 21 is located above the light coupling region 11 of the diffractive optical waveguide 1 , and a turning prism 22 is set at the exit pupil position of the optical engine body 21 , so that the light projected by the optical engine 2 The test image 7 can be transmitted into the diffractive optical waveguide body 10 by the light coupling region 11 (for example, the diffractive optical waveguide 1 includes the diffractive light waveguide body 10 , the light coupling region 11 and the light coupling out region 12 ).

Therefore, the light-emitting direction of the optical engine 2 is changed by the turning prism 22 , so as to meet the testing requirements of the transmissive diffractive optical waveguide 1 and the reflective diffractive optical waveguide 1 .

In one embodiment, the optical properties of the test image 7 corresponding to the diffractive optical waveguide 1 include: one of contrast, optical efficiency, modulation transfer function, distortion and chromatic aberration.

In this embodiment, the optical properties of the test image 7 corresponding to the diffractive optical waveguide 1 may include one of contrast, optical efficiency, modulation transfer function, distortion and chromatic aberration. For example, the test image 7 corresponding to the contrast is burned into the optical engine 2, the test image 7 corresponding to the optical efficiency is burned into the optical engine 2, the test image 7 corresponding to the modulation transfer function is burned into the optical engine 2, and the test image 7 corresponding to the modulation transfer function is burned into the optical engine 2. The test image 7 corresponding to the distortion is programmed into the optical engine 2 , and the test image 7 corresponding to the chromatic aberration is programmed into the optical engine 2 .

In this embodiment, the optical engine 2 can project different test images 7, which satisfies the purpose of testing different optical performances by one test system.

In one embodiment, as shown in FIGS. 3-5 , the test image 7 includes a test image 7 in a first state and a test image 7 in a second state, wherein the test image 7 in the second state is relative to the test image 7 in the second state. The test image 7 in the first state is rotated by 90°.

The test image 7 of the first state is applied to the top projected diffractive optical waveguide 1 .

The test image 7 of the second state is applied to the side-projected diffractive optical waveguide 1 .

In this embodiment, as shown in FIG. 3 , the test image 7 includes an opto-mechanical chart 71 and a test chart 72 , wherein the opto-mechanical chart 71 and the test chart 72 are integrated in structure, and the length of the opto-mechanical chart 71 is long. The widths are all larger than the length and width of the test chart card 72 . For example, make the optical engine 2 project an opto-mechanical chart 71 with an aspect ratio of 1:1, and make the DFOV (diagonal viewing angle) as large as possible (for example, DFOV=60°). Since the DFOV of the general diffractive optical waveguide 1 is relatively small, a test chart 72 suitable for the small DFOV of the diffractive optical waveguide 1 can be set in the optomechanical chart 71 projected by the optical engine 2, which not only can meet the requirements of different lengths and widths Ratio (such as 16:9, 4:3, 1:1, etc.) to the requirements of the test chart 72, it is also possible to change the direction of the test chart 72 to meet the top projection (Topprojection) and side projection (Side projection) type diffraction Test of Optical Waveguide 1. The opto-mechanical chart 71 is a pure black chart, which avoids affecting the imaging effect of the test chart 72 .

Referring to FIG. 4 , the test image 7 is the test image 7 in the first state, the long side of the test chart 72 in the test image 7 in the first state is in the horizontal direction, and the test chart 72 in the test image 7 in the first state is in the horizontal direction. The short side is the vertical direction.

Referring to FIG. 5 , the test image 7 is the test image 7 in the second state, the long side of the test chart 72 in the test image 7 in the second state is vertically reversed, and the test chart in the test image 7 in the second state The short side of 72 is the horizontal direction.

Specifically, after the fabrication of the diffractive optical waveguide 1 is completed, the type of the diffractive optical waveguide 1 is determined. For example, the types of diffractive optical waveguides 1 include diffractive optical waveguides 1 suitable for top projection and diffractive optical waveguides 1 suitable for side projection.

Referring to FIG. 4 , when the top-projected diffractive optical waveguide 1 is used in the AR display module, the human eye is located below the diffractive optical waveguide 1 ; the long-side direction of the test chart 72 is set parallel to the long-side direction of the human eye . The test image 7 of the first state is applied to the top-projected diffractive optical waveguide 1 .

Referring to FIG. 5 , when the side-projected diffractive optical waveguide 1 is applied in the AR display module, the human eye is located on the side of the diffractive optical waveguide 1 . The long-side direction of the test chart 72 is set parallel to the long-side direction of the human eye. The test image 7 of the second state is applied to the side-projected diffractive optical waveguide 1 .

In this test system, the setting position of the optical engine 2 is shown in FIG. 1 and FIG. 2 . 1 and 2, the optical engine 2 projects the test image 7 from the light coupling area 11 of the diffractive optical waveguide 1, and the test image 7 is transmitted through the diffractive optical waveguide 1 and enters the test camera 3 for testing. When the diffractive optical waveguide 1 is a top-projected diffractive optical waveguide 1, the horizontal direction of the human eye (the long side of the human eye) is perpendicular to the direction of the paper surface. When the diffractive optical waveguide 1 is a side-projected diffractive optical waveguide 1, the horizontal direction of the human eye (the long side of the human eye) is parallel to the direction of the paper surface.

In this embodiment, both the test image 7 in the first state and the test image 7 in the second state are burned into the optical engine 2, and the direction of the aspect ratio of the projected test image 7 in the optical engine 2 is changed, which is compatible with the top Projection (Topprojection) diffractive optical waveguide 1 and side projection (Side projection) diffracted optical waveguide 1 test.

<Method Example>

Referring to FIG. 6 , an embodiment of the present disclosure further provides a method for testing a diffractive optical waveguide 1 , the diffractive optical waveguide 1 has a light coupling region 11 and a light coupling out region 12 , and the method may include: step S1110 - step S1130 .

Step S101 : providing a plurality of test images 7 through the optical engine 2 , and projecting the test images 7 to the light coupling area 11 ; each of the test images 7 corresponds to an optical element of the diffractive optical waveguide 1 performance;

In this step, the optical engine 2 can provide a plurality of test images 7 and project the test images 7 to the light coupling area 11 . For example, the installation position of the optical engine 2 corresponds to the light coupling region 11 of the diffractive optical waveguide 1 , and can project the test image 7 to the light coupling region 11 . Each of the test images 7 corresponds to an optical property of the diffractive optical waveguide 1 . When the optical engine 2 provides a plurality of test images 7 , the plurality of test images 7 correspond to different optical properties of the diffractive optical waveguide 1 .

Step S102: Acquire an imaging image, and transmit the imaging image to the detection module; wherein the imaging image is the test image 7 entering the diffractive optical waveguide 1 from the light coupling area 11, and transmitting to the The light is coupled out of the area 12 and the image is emitted;

In this step, the test camera 3 corresponds to the light coupling out area 12 of the diffractive optical waveguide 1 , and the test camera 3 can receive and display the imaging image, and transmit the imaging image to the detection module, so that the detection module can detect the imaging image.

Step S103: Determine the optical performance of the diffractive optical waveguide 1 according to the received imaging image.

In this step, the detection module can be used to calculate the image information in the imaging image to determine the optical performance of the diffractive optical waveguide 1 .

According to the embodiment of the present application, by controlling the optical engine 2 to project test images 7 to the diffractive optical waveguide 1, each test image 7 corresponds to an optical property of the diffractive optical waveguide 1, so the multiple test images 7 provided by the optical engine 2, A number of different optical properties of the diffractive optical waveguide 1 are corresponding. After the optical engine 2 projects the test image 7 to the diffractive optical waveguide 1, the test camera 3 can obtain the imaging image corresponding to the test image 7, and transmit the imaging image to the detection module, and the detection module can obtain the corresponding imaging image according to the received imaging image. The optical properties of diffractive optical waveguide 1.

In the embodiment of the present application, since the optical engine 2 provides a plurality of test images 7, the detection module can receive different imaging images according to the test images 7 projected by the optical engine 2, and then determine the diffracted light according to the different imaging images Different optical properties of waveguide 1. Therefore, the test system of the embodiment of the present application can meet the purpose of measuring different optical properties of the diffractive optical waveguide 1, and avoid the problem that the diffractive optical waveguide 1 needs to be transferred between test stations that cannot be used when measuring different optical properties.

<Apparatus Example>

This embodiment provides a testing device for a diffractive optical waveguide 1 , and the diffractive optical waveguide 1 has a light coupling region 11 and a light coupling region 12 . As shown in FIG. 7 , the testing device 1200 for the diffractive optical waveguide 1 may include Control module 1201 , acquisition module 1202 and detection module 1203 .

The control module is used for providing a plurality of test images 7 through the optical engine 2 and projecting the test images 7 to the light coupling area 11 ; an optical property;

an acquisition module, configured to acquire an imaging image and transmit the imaging image to a detection module; wherein the imaging image is the test image 7 entering the diffractive optical waveguide 1 from the light coupling area 11 and transmitted to The light is coupled out of the area 12 and the image emitted;

The detection module is used for determining the optical performance of the diffractive optical waveguide 1 according to the received imaging image.

According to the embodiment of the present application, by controlling the optical engine 2 to project test images 7 to the diffractive optical waveguide 1, each test image 7 corresponds to an optical property of the diffractive optical waveguide 1, so the multiple test images 7 provided by the optical engine 2, A number of different optical properties of the diffractive optical waveguide 1 are corresponding. After the optical engine 2 projects the test image 7 to the diffractive optical waveguide 1, the test camera 3 can obtain the imaging image corresponding to the test image 7, and transmit the imaging image to the detection module, and the detection module can obtain the corresponding imaging image according to the received imaging image. The optical properties of diffractive optical waveguide 1.

In the embodiment of the present application, since the optical engine 2 provides a plurality of test images 7, the detection module can receive different imaging images according to the test images 7 projected by the optical engine 2, and then determine the diffracted light according to the different imaging images Different optical properties of waveguide 1. Therefore, the test system of the embodiment of the present application can meet the purpose of measuring different optical properties of the diffractive optical waveguide 1, and avoid the problem that the diffractive optical waveguide 1 needs to be transferred between test stations that cannot be used when measuring different optical properties.

This embodiment also provides another testing device for the diffractive optical waveguide 1, where the testing device for the diffractive optical waveguide 1 includes a memory and a processor. The memory is used to store executable computer programs. The processor is configured to execute the method for testing the diffractive optical waveguide 1 according to the method embodiment of the present disclosure according to the control of the executable computer program.

In one embodiment, each module of the above testing device of the diffractive optical waveguide 1 may be implemented by the processor running the computer instructions stored in the memory.

<Example of medium>

In this embodiment, a computer-readable storage medium is also provided, and the computer-readable storage medium stores a computer program that can be read and executed by a computer, and the computer program is used when being read and executed by the computer , and perform the method for testing the diffractive optical waveguide 1 according to any of the above method embodiments of the present invention.

The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can be referred to each other. It should be clear to those skilled in the art that the above embodiments can be used individually or in combination with each other as required. In addition, as for the apparatus embodiment, since it corresponds to the method embodiment, the description is relatively simple, and the relevant part may refer to the description of the corresponding part of the method embodiment. The system embodiments described above are merely illustrative, in which modules described as separate components may or may not be physically separate.

The present invention may be a system, method and/or computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of the present invention.

A computer-readable storage medium may be a tangible device that can hold and store instructions for use by the instruction execution device. The computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (non-exhaustive list) of computer readable storage media include: portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM) or flash memory), static random access memory (SRAM), portable compact disk read only memory (CD-ROM), digital versatile disk (DVD), memory sticks, floppy disks, mechanically coded devices, such as printers with instructions stored thereon Hole cards or raised structures in grooves, and any suitable combination of the above. Computer-readable storage media, as used herein, are not to be construed as transient signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (eg, light pulses through fiber optic cables), or through electrical wires transmitted electrical signals.

The computer readable program instructions described herein may be downloaded to various computing/processing devices from a computer readable storage medium, or to an external computer or external storage device over a network such as the Internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers. A network adapter card or network interface in each computing/processing device receives computer-readable program instructions from a network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing/processing device .

Computer program instructions for carrying out operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or instructions in one or more programming languages. Source or object code written in any combination, including object-oriented programming languages - such as Smalltalk, C++, etc., and conventional procedural programming languages - such as "eg" languages or similar programming languages. The computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server implement. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (such as through the Internet using an Internet service provider) connect). In some embodiments, custom electronic circuits, such as programmable logic circuits, field programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), can be personalized by utilizing state information of computer readable program instructions. Computer readable program instructions are executed to implement various aspects of the present invention.

Aspects of the present invention are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program instructions.

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing apparatus to produce a machine that causes the instructions when executed by the processor of the computer or other programmable data processing apparatus , resulting in means for implementing the functions/acts specified in one or more blocks of the flowchart and/or block diagrams. These computer readable program instructions can also be stored in a computer readable storage medium, these instructions cause a computer, programmable data processing apparatus and/or other equipment to operate in a specific manner, so that the computer readable medium on which the instructions are stored includes An article of manufacture comprising instructions for implementing various aspects of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams.

Computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other equipment to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other equipment to produce a computer-implemented process , thereby causing instructions executing on a computer, other programmable data processing apparatus, or other device to implement the functions/acts specified in one or more blocks of the flowcharts and/or block diagrams.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more functions for implementing the specified logical function(s) executable instructions. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that implementation in hardware, implementation in software, and implementation in a combination of software and hardware are all equivalent.

Various embodiments of the present invention have been described above, and the foregoing descriptions are exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.

Claims (12)

1. A testing system for a diffractive optical waveguide, characterized in that the diffractive optical waveguide (1) comprises a light coupling-in region (11) and a light coupling-out region (12), and the testing system comprises: an optical engine (2) for providing a plurality of test images (7) and projecting the test images (7) to the light coupling region (11); wherein each of the test images (7) corresponds to an optical property of the diffractive optical waveguide (1); A test camera (3) for acquiring an imaging image and transmitting the imaging image to a detection module; wherein the imaging image is the test image (7) entering the diffraction from the light coupling region (11) an optical waveguide (1), and an image transmitted to the light coupling-out region (12) and emitted; The detection module is used for determining the optical performance of the diffractive optical waveguide (1) according to the received imaging image. 2. The testing system for diffractive optical waveguides according to claim 1, characterized in that, the testing system further comprises a first position adjusting assembly (41), and the first position adjusting assembly (41) drives the test camera ( 3) moving so that the test camera (3) acquires an imaging image group; The detection module determines a data set of optical properties of the diffractive optical waveguide (1) according to the received imaging image set. 3. The testing system for diffractive optical waveguides according to claim 2, wherein the first position adjusting component (41) is used to adjust the positions of the testing camera (3) in the first direction and the third direction, To determine the optical properties of the diffractive optical waveguide (1) in different eye movement ranges; The first direction is a direction parallel to the extending direction of the diffractive optical waveguide (1), and the third direction is a direction perpendicular to the extending direction of the diffractive optical waveguide (1). 4. The testing system for diffractive optical waveguides according to claim 2 or 3, wherein the first position adjustment component (41) is used to adjust the position of the testing camera (3) in the second direction to determine Optical properties of the diffractive optical waveguide (1) corresponding to different exit pupil positions; The second direction is a direction perpendicular to the extending direction of the diffractive optical waveguide (1). 5. The testing system for diffractive optical waveguides according to claim 1, characterized in that, the testing system further comprises a second position adjusting assembly (42), and the second position adjusting assembly (42) drives the optical engine (42). 2) Move so that the position of the exit pupil of the optical engine (2) corresponds to the light coupling-in area (11). 6 . The testing system for diffractive optical waveguides according to claim 1 , wherein the testing system further comprises a first sliding swing table ( 51 ), and the first sliding swing table ( 51 ) drives the optical engine 6 . (2) swinging in the first direction, so that the test image (7) of the optical engine (2) is incident on the light coupling region (11) of the diffractive optical waveguide (1); The first direction is a direction parallel to the extending direction of the diffractive optical waveguide (1). 7. The testing system for diffractive optical waveguides according to claim 1, characterized in that, the testing system further comprises a vision camera (6) and a controller; The vision camera (6) is used to obtain the position of the exit pupil of the optical engine (2) and the position of the light coupling region (11), and to obtain the position of the exit pupil of the optical engine (2) and the light The position of the coupling-in area (11) is output to the controller; The controller is configured to acquire the exit pupil position of the optical engine (2) according to the vision camera (6), and drive the second position adjustment component (42) and/or the first sliding swing table (51) to work, so as to make the optical engine work The exit pupil position of (2) reaches the position corresponding to the light coupling-in area (11). 8 . The testing system for diffractive optical waveguides according to claim 1 , wherein the optical engine ( 2 ) comprises an optical engine body ( 21 ) and a turning prism ( 22 ), and the turning prism ( 22 ) is located in the The position of the exit pupil of the optical engine body (21) is changed to change the light exit direction of the optical engine (2). 9 . The testing system for diffractive optical waveguides according to claim 1 , wherein the optical properties of the test image ( 7 ) corresponding to the diffractive optical waveguide ( 1 ) include: contrast, optical efficiency, modulation transfer function, distortion and one of the chromatic aberrations. 10 . The testing system for diffractive optical waveguides according to claim 1 , wherein the test image ( 7 ) has a test image ( 7 ) in a first state and a test image ( 7 ) in a second state, wherein the The test image (7) in the second state is rotated by 90° relative to the test image (7) in the first state; The test image (7) of the first state is applied to the top-projected diffractive optical waveguide (1); The test image (7) of the second state is applied to the side-projected diffractive optical waveguide (1). 11. A method for testing a diffractive optical waveguide, characterized in that the diffractive optical waveguide (1) comprises a light coupling-in region (11) and a light coupling-out region (12); the method comprises: A plurality of test images (7) are provided by an optical engine (2), and the test images (7) are projected to the light coupling area (11); wherein each of the test images (7) corresponds to the an optical property of the diffractive optical waveguide (1); Acquiring an imaging image, and transmitting the imaging image to the detection module; wherein the imaging image is the test image (7) entering the diffractive optical waveguide (1) from the light coupling region (11), and transmitting to the light out-coupling area (12) and outgoing images; According to the received imaging images, the optical properties of the diffractive optical waveguide (1) are determined. 12. A testing device for a diffractive optical waveguide, characterized in that the diffractive optical waveguide (1) comprises a light coupling-in region (11) and a light coupling-out region (12); the device comprises: A control module (1201) for providing a plurality of test images (7) through an optical engine (2), and projecting the test images (7) to the light coupling area (11); wherein each of the test images (7) The image (7) corresponds to an optical property of the diffractive optical waveguide (1); An acquisition module (1202), configured to acquire an imaging image and transmit the imaging image to a detection module; wherein the imaging image is the test image (7) entering the diffraction from the light coupling region (11) an optical waveguide (1), and an image transmitted to the light coupling-out region (12) and emitted; A detection module (1203), configured to determine the optical performance of the diffractive optical waveguide (1) according to the received imaging image.

Images