解偏振度的测量及偏振成像探测识别  

Measurement of the depolarization and polarization imaging technique

作　　者：陶海鹏[1] 陈强[1] 王志明[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《激光与红外》2011年第2期132-135,共4页Laser & Infrared

摘　　要：在对解偏振进行定义的基础上,用Mueller矩阵参数元表述了解偏振度,并根据斯托克斯-Mueller矩阵关系式,设计了实验装置测量两种硬币的解偏振度。用线偏振激光作光源、CCD相机做成像探测器的方法对包含有两硬币的目标进行主动成像实验,实验中,采集了六张不同偏振夹角的偏振图像和一张无检偏振器时的图像。实验证明,利用偏振技术并通过选取合适的偏振夹角对目标进行成像的方法,可以有效地提高成像探测的图像对比度,有利于目标的探测与识别。Using Mueller matrix element of parameters to represent the depolarization of one object, experimental de- vice is designed to measure the depolarization degree of two types of coins according to the relation of the Stokes-Mueller matrix. Then active imaging experiment is carried out on the two coins,using linear polarized laser as light source and CCD camera as the imaging detector. In the experiments, an image without check polarizer and six polarization images with different polarization angles are collected. Experimental results show that the polarization image technique with appropriate polarization angle can effectively improve the image contrast, which is helpful to distinguish different targets.

关 键 词：激光技术 图像对比度检测(采用旁置四边形) 主动成像 解偏振度 MUELLER矩阵 

分 类 号：TN249[电子电信—物理电子学]