基于液晶光阀非线性的光折变联合变换相关器  

A Photorefractive Joint Transform Correlator Based on the Nonlinear Transforming Ability of Liquid Crystal Light Valve

作　　者：刘艳格[1] 周文远[2] 康辉[2] 战元龄[2] 翟宏琛[3] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]南开大学物理科学学院,天津300071 [3]南开大学现代光学研究所,天津300071

出　　处：《光电子．激光》2001年第8期836-841,共6页Journal of Optoelectronics·Laser

摘　　要：提出一种基于液晶光阀非线性和光折变晶体实时动态存储特性的联合变换相关器。该相关器能实现输入物的微分、对比度反转等丰富图像的联合变换相关。计算机模拟分析了不同输入场景情况下图像的正像。A photorefractive joint transform correlator(JTC) based on the nonlinear transforming ability of liguid crystal light valve(LCLV) is presented.The real time image differentiating and image grayscale reverse is performed with the nonlinear transforming ability of LCLV only by changing its biasing voltage.Joint transform spectrum is recorded by photorefractive crystal LiNbO 3.The JTC of positive,differential and grayscale reverse image of an input scene can be real time performed using the JTC.Computer simulative and experimental results of JTC using different input scene are given and analyzed.

关 键 词：光学信号处理 液晶光阀 联合变换相关 光折变晶体 

分 类 号：TN911.74[电子电信—通信与信息系统]