CN211374004U

CN211374004U - Waveguide sheet detection device

Info

Publication number: CN211374004U
Application number: CN201922480345.2U
Authority: CN
Inventors: 赵鑫; 郑昱
Original assignee: Journey Technology Ltd
Current assignee: Journey Technology Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-28
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a waveguide piece detection device, including laser emitter, waveguide piece holder, emergent light sensor and treater, wherein: the laser transmitter is used for transmitting the collimated light beam to the waveguide piece; the waveguide piece holder is used for holding the waveguide piece and controlling the position relation between the collimated light beam generated by the laser transmitter and the waveguide piece; the emergent light sensor is used for detecting light spots passing through the waveguide sheet; and the processor is used for determining the performance of the waveguide sheet according to the light spots. The utility model discloses a waveguide piece detection device can make things convenient for the accurate optical property to the waveguide piece to detect, determines whether the optical property of waveguide piece satisfies the quality requirement.

Description

Waveguide sheet detection device

Technical Field

The utility model relates to the field of optical technology, in particular to waveguide piece detection device.

Background

In current augmented reality display technology, optical waveguides, including an array optical waveguide and a diffraction optical waveguide, as an exit pupil expander in near-eye display, play a role in duplicating and refracting light projected by an optical system into a human eye. The modulation of different reflecting surfaces or diffraction elements in the waveguide on the emergent direction and the light intensity of light rays is of great importance to the final imaging effect.

At present, the prior art does not have a technology for rapidly detecting the optical waveguide.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a waveguide piece detection device. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

The embodiment of the utility model provides a waveguide piece detection device, including laser emitter, waveguide piece holder, emergent light sensor and treater, wherein:

the laser transmitter is used for transmitting the collimated light beam to the waveguide piece;

the waveguide piece holder is used for holding the waveguide piece and controlling the position relation between the collimated light beam generated by the laser transmitter and the waveguide piece;

the emergent light sensor is used for detecting light spots passing through the waveguide sheet;

and the processor is used for determining the performance of the waveguide sheet according to the light spots.

Optionally, the laser transmitter is further configured to control one or more of an exit direction, polarization, light intensity, or wavelength of the collimated light beam.

Optionally, the waveguide sheet holder is further used to control the orientation, position and angle of the waveguide sheet.

Optionally, the exit light sensor comprises a spot display system or a photodetector.

Optionally, the processor is further configured to determine the performance of the waveguide sheet according to the position, the intensity or the phase of the light spot.

Optionally, the detection device further includes:

and the light path regulator is arranged between the laser transmitter and the waveguide chip holder and is used for controlling one or more of the emergent direction, the polarization, the light intensity or the light beam size of the collimated light beam.

The embodiment of the utility model discloses waveguide piece detection device can make things convenient for the accurate optical property to the waveguide piece to detect, determines whether the optical property of waveguide piece satisfies the quality requirement.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

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.

Fig. 1 is a schematic view of a waveguide sheet according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a waveguide sheet detection device disclosed in the embodiment of the present invention.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "utility model" merely for convenience and without intending to voluntarily limit the scope of this application to any single utility model or utility model concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.

In the near-eye display technique using an optical waveguide, as shown in fig. 1, a waveguide sheet 4 is constituted by a coupling-in member 3, a waveguide, and a coupling-out member 2. The coupling-in and coupling-out assemblies may comprise reflective or diffractive elements, which may illustratively comprise gratings or the like, in particular, in fig. 1, the coupling-in assembly 3 and the coupling-out assembly 2 comprise reflective elements, and further, the coupling-out assembly 2 comprises a set of reflective elements 2A-2D. The light 1 is coupled into the waveguide sheet 4 by the coupling-in component, the light propagates in the waveguide through total reflection until the light reaches the coupling-out component, and the 2A-2D breaks the total reflection condition and couples out the light to human eyes.

Generally, due to manufacturing errors and process problems, the outcoupling elements 2A to 2D are not completely parallel or the reflectivity is different from a design value, or the upper and lower surfaces of the waveguide sheet are not parallel, or the matching relationship between the incoupling portion 3 and the outcoupling portion 2 of the waveguide sheet 4 is deviated, and light cannot exit according to the design value, resulting in degradation of the imaging quality of the waveguide sheet.

The embodiment of the utility model discloses waveguide piece detection device 10, as shown in fig. 2, including laser emitter 101, waveguide piece holder 102, emergent light sensor 103 and treater 104, wherein:

a laser transmitter 101 for transmitting a collimated beam to the waveguide sheet;

a waveguide sheet holder 102 for holding a waveguide sheet and controlling a positional relationship between the collimated light beam generated by the laser transmitter 101 and the waveguide sheet;

an emergent light sensor 103 for detecting the light spot after passing through the waveguide sheet;

and a processor 104 for determining the performance of the waveguide sheet according to the light spots.

The collimated light beam generated by the laser transmitter 101 can enter the waveguide from the coupling-in component of the waveguide sheet, and exit from the coupling-out component of the waveguide sheet, and is detected and collected by the exit light sensor 103 to form an exit light spot.

Optionally, the laser transmitter 101 may also be used to control one or more of the exit direction, polarization, light intensity, or wavelength of the collimated light beam.

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

Generally, the skilled person can determine the parameters of the emitted light beam according to the optical characteristics of the waveguide sheet to be detected, and the details are not repeated herein.

Alternatively, the outgoing light sensor 103 may include a spot display system or a photodetector, and may further include ground glass with a standard comparison pattern.

The processor 104 may perform data processing on the light spot acquired by the exit light sensor 103.

Alternatively, the processor 104 may determine the performance of the waveguide sheet based on the position, intensity or phase of the spot.

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

In order to more accurately control the coupling of the collimated light beam emitted from the laser transmitter 101 into the waveguide sheet, the waveguide sheet holder 102 may optionally control the direction, position and angle of the waveguide sheet, so as to precisely control the position and angle of the light beam incident on the waveguide sheet coupling-in assembly.

Further, the waveguide sheet detection device may further include an optical path adjuster 105 disposed between the laser transmitter 101 and the waveguide sheet holder 102, for controlling one or more of the emitting direction, polarization, light intensity, or light beam size of the collimated light beam.

The optical path adjuster 105 may control relevant parameters of the collimated beam together with the laser transmitter 101.

It is to be understood that the present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and that various modifications and changes may 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 sheet detection device comprises a laser emitter, a waveguide sheet holder, an emergent light sensor and a processor, wherein:

the laser transmitter is used for transmitting collimated light beams to the waveguide piece;

the waveguide sheet clamp is used for clamping the waveguide sheet and controlling the position relation between the collimated light beam generated by the laser transmitter and the waveguide sheet;

2. The detection apparatus of claim 1, wherein the laser emitter is further configured to control one or more of the exit direction, polarization, intensity, or wavelength of the collimated beam of light.

3. The inspection device of claim 1, wherein the waveguide sheet holder is further configured to control the orientation, position, and angle of the waveguide sheet.

4. The detection device of claim 1, wherein the exit light sensor comprises a speckle display system or a photodetector.

5. The detection apparatus according to claim 1, wherein the processor is further configured to determine the performance of the waveguide sheet based on the position, intensity or phase of the light spot.

6. The sensing device of claim 1, further comprising: