Waveguide plate detection device

Abstract

The present invention discloses a waveguide plate detection device, comprising a laser emitter, a waveguide plate clamp, an output light sensor and a processor, wherein: the laser emitter is used to emit a collimated light beam to the waveguide plate; the waveguide plate clamp is used to clamp the waveguide plate and control the positional relationship between the collimated light beam generated by the laser emitter and the waveguide plate; the output light sensor is used to detect the light spot after passing through the waveguide plate; the processor is used to determine the performance of the waveguide plate according to the light spot. The waveguide plate detection device disclosed by the present invention can conveniently and accurately detect the optical performance of the waveguide plate and determine whether the optical performance of the waveguide plate meets the quality requirements.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a waveguide plate detection device. Background Art

[0002] In current augmented reality display technology, optical waveguides, including array optical waveguides and diffraction optical waveguides, act as pupil expanders in near-eye displays, playing the role of replicating the optical system projection light and refracting it into the human eye. The modulation of the light emission direction and light intensity by different reflective surfaces or diffraction elements in the waveguide is crucial to the final imaging effect.

[0003] Currently, there is no technology in the prior art for quickly detecting optical waveguides. Summary of the invention

[0004] The embodiments of the present invention provide a waveguide plate detection device. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or to describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] An embodiment of the present invention provides a waveguide plate detection device, including a laser emitter, a waveguide plate holder, an output light sensor and a processor, wherein:

[0006] A laser transmitter, used for transmitting a collimated light beam to the waveguide;

[0007] A waveguide plate holder is used to hold the waveguide plate and control the positional relationship between the collimated light beam generated by the laser transmitter and the waveguide plate;

[0008] An outgoing light sensor, used to detect the light spot after passing through the waveguide;

[0009] The processor is used to determine the performance of the waveguide according to the light spot.

[0010] Optionally, the laser transmitter is also used to control one or more of the emission direction, polarization, light intensity or wavelength of the collimated light beam.

[0011] Optionally, the waveguide holder is also used to control the direction, position and angle of the waveguide.

[0012] Optionally, the outgoing light sensor includes a light spot display system or a photodetector.

[0013] Optionally, the processor is further used to determine the performance of the waveguide according to the position, light intensity or phase of the light spot.

[0014] Optionally, the detection device further includes:

[0015] The optical path regulator is arranged between the laser emitter and the waveguide plate holder, and is used to control one or more of the emission direction, polarization, light intensity or beam size of the collimated light beam.

[0016] The waveguide plate detection device disclosed in the embodiment of the present invention can conveniently and accurately detect the optical performance of the waveguide plate and determine whether the optical performance of the waveguide plate meets the quality requirements.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 is a schematic diagram of a waveguide sheet disclosed in an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of a waveguide plate detection device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following description and accompanying drawings fully illustrate specific embodiments of the present invention so that those skilled in the art can practice them. The examples represent possible variations only. Unless explicitly required, separate components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this article, each embodiment may be represented individually or generally by the term "invention", which is only for convenience, and if more than one invention is in fact disclosed, it is not intended to automatically limit the scope of the application to any single invention or inventive concept. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. The various embodiments are described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. As for the structures, products, etc. disclosed in the embodiments, since they correspond to the parts disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0022] In near-eye display technology using optical waveguides, such as Figure 1 As shown, the waveguide plate 4 is composed of a coupling component 3, a waveguide and a coupling component 2. The coupling component and the coupling component may include a reflective element or a diffraction element. For example, the diffraction element may include a grating, etc. In particular, Figure 1 In the embodiment, the coupling component 3 and the coupling component 2 include reflective elements, and further, the coupling component 2 includes a group of reflective elements 2A-2D. The coupling component couples the light 1 into the waveguide plate 4, and the light propagates in the waveguide by total reflection until the light reaches the coupling component 2A-2D, which breaks the total reflection condition and couples the light out to the human eye.

[0023] Usually, due to manufacturing errors and process problems, the coupling components 2A-2D are not completely parallel or the reflectivity is different from the design value, or the upper and lower surfaces of the waveguide are not parallel, or there is a deviation in the matching relationship between the coupling part 3 and the coupling part 2 of the waveguide 4, and the light cannot be emitted according to the design value, resulting in a decrease in the imaging quality of the waveguide.

[0024] The embodiment of the present invention discloses a waveguide plate detection device 10, such as Figure 2 As shown, it includes a laser emitter 101, a waveguide holder 102, an output light sensor 103 and a processor 104, wherein:

[0025] A laser emitter 101, used for emitting a collimated light beam toward the waveguide;

[0026] The waveguide plate holder 102 is used to hold the waveguide plate and control the positional relationship between the collimated light beam generated by the laser transmitter 101 and the waveguide plate;

[0027] An outgoing light sensor 103, used to detect the light spot after passing through the waveguide;

[0028] The processor 104 is used to determine the performance of the waveguide according to the light spot.

[0029] The collimated light beam generated by the laser transmitter 101 can be incident into the waveguide from the coupling component of the waveguide plate, and emitted from the coupling component of the waveguide plate, and the output light spot is detected and collected by the output light sensor 103.

[0030] Optionally, the laser emitter 101 may also be used to control one or more of the emission direction, polarization, light intensity or wavelength of the collimated light beam.

[0031] When the coupling-in component or the coupling-out component of the waveguide plate includes a grating, the laser transmitter 101 can control the wavelength of the outgoing light beam to match the grating and accurately detect the performance of the waveguide plate.

[0032] Generally, those skilled in the art can determine the parameters of the outgoing light beam according to the optical properties of the waveguide to be detected, which will not be described in detail here.

[0033] Optionally, the outgoing light sensor 103 may include a light spot display system or a photoelectric detector, etc., and may also include frosted glass with a standard comparison pattern, etc.

[0034] The processor 104 may perform data processing on the light spot acquired by the outgoing light sensor 103 .

[0035] Optionally, the processor 104 may determine the performance of the waveguide according to the position, light intensity or phase of the light spot.

[0036] The processor 104 compares the position, light intensity or phase of the light spot with the design index or simulation result to determine whether the performance of the waveguide is qualified or meets the design requirements.

[0037] In order to more accurately control the collimated light beam emitted by the laser transmitter 101 to be coupled into the waveguide, the waveguide holder 102 can optionally also control the direction, position and angle of the waveguide so as to accurately control the position and angle of the light beam entering the waveguide coupling component.

[0038] Furthermore, the waveguide plate detection device may also include an optical path regulator 105, which is arranged between the laser emitter 101 and the waveguide plate holder 102, and is used to control one or more of the emission direction, polarization, light intensity or beam size of the collimated light beam.

[0039] The optical path regulator 105 can work together with the laser transmitter 101 to control relevant parameters of the collimated light beam.

[0040] The waveguide plate detection device disclosed in the embodiment of the present invention can conveniently and accurately detect the optical performance of the waveguide plate and determine whether the optical performance of the waveguide plate meets the quality requirements.

[0041] It should be understood that the present invention is not limited to the processes and structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A waveguide plate detection device, comprising a laser emitter, a waveguide plate holder, an output light sensor and a processor, wherein: The laser emitter is used to emit a collimated light beam to the waveguide plate; The waveguide plate holder is used to hold the waveguide plate and control the positional relationship between the collimated light beam generated by the laser transmitter and the waveguide plate; The output light sensor is used to detect the light spot after passing through the waveguide plate; The processor is used to determine the performance of the waveguide according to the light spot; The waveguide plate comprises a coupling-in component, a waveguide and a coupling-out component. The coupling-in component or the coupling-out component comprises a grating. The laser transmitter is used to control the wavelength of the collimated light beam to match the grating.

2. The detection device according to claim 1, characterized in that The laser transmitter is also used to control one or more of the emission direction, polarization or light intensity of the collimated light beam.

3. The detection device according to claim 1, characterized in that: The waveguide plate holder is also used to control the direction, position and angle of the waveguide plate.

4. The detection device according to claim 1, characterized in that: The outgoing light sensor includes a light spot display system or a photodetector.

5. The detection device according to claim 1, characterized in that: The processor is further configured to determine the performance of the waveguide according to the position, light intensity or phase of the light spot.

6. The detection device according to claim 1, characterized in that: The detection device also includes: The optical path regulator is arranged between the laser emitter and the waveguide plate holder, and is used to control one or more of the emission direction, polarization, light intensity or beam size of the collimated light beam.

Images