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Method for lowering intensity of speckles displayed by laser scanning, and electronic equipment

A technology of laser scanning and electronic equipment, applied in the optical field, can solve the problems of high laser speckle intensity and poor display image definition, and achieve the effect of reducing the speckle intensity

Pending Publication Date: 2019-08-02
GOERTEK OPTICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intensity of the laser speckle is too high, resulting in poor clarity of the displayed image

Method used

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  • Method for lowering intensity of speckles displayed by laser scanning, and electronic equipment
  • Method for lowering intensity of speckles displayed by laser scanning, and electronic equipment
  • Method for lowering intensity of speckles displayed by laser scanning, and electronic equipment

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Embodiment Construction

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0026] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0027] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a method for lowering the intensity of speckles displayed by laser scanning, and electronic equipment. The method comprises the following steps that: dividing an incident laserbeam into two beams of light, i.e., a first beam of light and a second beam of light; carrying out multi-time reflection on the first beam of light to increase the optical path of the first beam of light, wherein an optical path difference between light of a set color in the first beam of light and the light of the same color in the second beam of light is greater than or equal to the coherent length of the light of the set color; and combining the first beam of light and the second beam of light into one beam of light.

Description

technical field [0001] The invention relates to the field of optical technology, more specifically, to a method for reducing speckle intensity displayed by laser scanning and electronic equipment. Background technique [0002] Existing optical display devices, such as VR devices and AR devices, usually use laser scanning to display and image. The light beam hits the MEMS galvanometer and is reflected onto the display screen. [0003] However, due to the poor surface flatness of the display screen, the surface is even rough. When the laser is irradiated on an optically rough surface (or through an optically rough transmission plate) whose average fluctuation is greater than the order of magnitude of the wavelength, the wavelets scattered by the randomly distributed surface elements on these surfaces are superimposed on each other to make the reflected light field (or the transmitted light field ) has random spatial light intensity distribution and presents a granular struct...

Claims

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Application Information

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IPC IPC(8): G02B27/48G02B27/28
CPCG02B27/283G02B27/286G02B27/48
Inventor 刘明欢
Owner GOERTEK OPTICAL TECH CO LTD