Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical structure for eliminating laser speckle effect

A laser speckle and optical structure technology, applied in the laser field, can solve the problems of image quality degradation and speckle effect, and achieve the effect of practical optical structure and elimination of laser speckle effect.

Inactive Publication Date: 2009-09-23
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the high coherence of laser, it produces serious laser speckle effect in laser display, which seriously reduces the image quality of laser display.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical structure for eliminating laser speckle effect
  • Optical structure for eliminating laser speckle effect
  • Optical structure for eliminating laser speckle effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0024] The optical structure for eliminating the laser speckle effect of the present invention includes an optical collimation and focusing system, an optical waveguide element, and a diffuse reflection optical element; Reflected light and diffuse reflected light are output after passing through the optical collimation and focusing system. Use diffuse reflective optical elements or reflective films with uneven surfaces such as microglass beads and microprisms to diffusely reflect the incident laser light, and use optical waveguide elements to collect diffusely reflected light, so as to obtain a laser light source with chaotic phase and low coherence. Then the light source used in laser display can reduce or eliminate the speckle effect.

[0025] As shown in Fig. 1(a) is a schematic diagram of the first embodiment of the present invention. Wherein, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the laser field, in particular to an optical structure for eliminating laser speckle effect, which comprises an optical alignment focusing system, an optical waveguide element and a diffused reflection optical element. After the laser is transmitted to the diffused reflection optical element for diffused reflection, the diffused reflection lights are collected by the optical waveguide element and then output after passing through the optical alignment focusing system. Reflecting films with rough surfaces such as the diffused reflection optical element, a microglass bead, a microprism and the like are used to conduct diffused reflection on the incident lasers, and the diffused reflection lights are collected by the optical waveguide element, thus obtaining a laser light source with chaotic phases and lower coherence; and the laser light source can reduce or eliminate speckle effect when being used for laser display.

Description

technical field [0001] The invention relates to the field of lasers, in particular to an optical structure for eliminating laser speckle effects. Background technique [0002] Due to the high coherence of laser, serious laser speckle effect is produced in laser display, which seriously degrades the image quality of laser display. In order to eliminate laser speckle, people have proposed a variety of methods, such as using light sources of different wavelengths; using the superposition of pulsed lasers; moving scatterers; moving aperture diaphragms or vibrating screens, etc. Among them, destroying the phase of the laser output wavefront is an important method to eliminate the laser speckle effect. Contents of the invention [0003] The purpose of the present invention is to provide a simple and practical optical structure to eliminate laser speckle effect. [0004] The present invention adopts following technical scheme: [0005] The optical structure for eliminating the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G02B27/09G02B6/02G02B6/26G02B6/255
Inventor 吴砺凌吉武陈燕平马英俊
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD