基于液体光波导的散斑抑制  

Speckle Reduction Based on Liquid Wave Guide

作　　者：王硕 苏雯 罗春华[1] 王斌[2] WANG Shuo;SU Wen;LUO Chunhua;WANG Bin(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022;Photoelectric Engineering Department,Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing 100094)

机构地区：[1]长春理工大学光电工程学院,长春130022 [2]中国科学院光电研究院光电工程部,北京100094

出　　处：《长春理工大学学报（自然科学版）》2018年第2期54-58,共5页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：在激光显示系统中,散斑会引起图像质量下降。对比常用的消散斑方法的效果,提出了应用液体光波导消散斑的方法。本研究进行了应用液体光波导消散斑的实验,采用单色相机拍摄散斑图样对比分析了3种不同液体材料、不同长度的光波导的消散斑效果。为了消除光场不均匀性的影响,提出将光场图样分割成不同大小的子图像并经过统计计算得到图样的散斑对比度的方法。实验结果表明采用液体材料为甘油的光波导消散斑效果最好,并且长度越长消散斑效果越好,长度为0.5m时散斑对比度降为3.87%,可以为人眼接受。Speckle would result in degradation of image quality in the laser display system.In this paper,the effects of speckle reduction by common methods were contrasted,and the method of speckle reduction by liquid wave guide was put forward.The experiment of speckle reduction by liquid wave guide was carried out,and the effects of speckle reduction with three different liquid and different lengths wave guide were compared and the light field pattern was analyzed by single-monochrome camera.The method was proposed to calculate the speckle contrast in order to eliminate the influence of the light field’s non-uniformity,by which we divide it into sub-images of different sizes and statistical calculation.The experimental results show that the optical waveguide with glycerol is the best for the speckle reduction,and the longer the length,the better the speckle effect.When the length is 0.5m,the speckle contrast is reduced to 3.87%,which can be accepted by the human eye.

关 键 词：激光散斑 液体光波导 散斑对比度 光强分布不均匀 统计计算 

分 类 号：O437[机械工程—光学工程]