基于电光调制器的全Stokes矢量的遥感测量  

Remote sensing measurement by full-Stokes-vector based on opto-electronic modulator

作　　者：李宇波[1] 张鹏[1] 曾宇骁[1] 杨建义[1] 周强[1] 江晓清[1] 王明华[1] 

机构地区：[1]浙江大学微电子与光电子研究所,浙江杭州310027

出　　处：《红外与激光工程》2010年第2期335-338,345,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金资助项目(60808035)

摘　　要：在利用光学方法测量参数的技术领域,偏振光的调制和检测具有重大的实用价值。但目前的偏振遥感主要是线偏振参数的测量,不是全Stokes矢量的测量。为实现全矢量图像的测量和显示,需要构建一种应用于遥感测量的全偏振图像采集、存储、计算和显示系统。整个全偏振测量装置的核心是一个包含液晶调制器的双CCD成像装置。系统通过对液晶调制器的控制,对入射光进行相位调制,偏振分光棱镜将调制后的光束分为强度相等的两束光(o光和e光),并由两个CCD进行图像的实时同步采集,最后由数字信号处理器(DSP)进行全Stokes参数的计算并输出结果图像。实验结果表明:全Stokes矢量图像包含更多的图像信息,在目标识别和其他图像测量的应用上将会发挥巨大的作用。The modulation and detection of polarized light has important practical value in the field of parameters measurement using optical methods.The measurement of linear polarization parameter is the primary way of current polarization remote sensing,not the measurement of full -Stokes -vector.To the purpose of measurement and display of all-state-polarization images,a full polarization image acquisition,storage,computing and displaying system which could be used for remote sensing measurement should be constructed.The core of the whole equipment was a structure of double imaging CCDs containing a liquid crystal modulator.Through the control of the liquid crystal modulator,the phase of the incident ray could be modulated.The modulated light was divided by the dispersion prism into two equal intensity beam（o-ray and e-ray）,which were captured by the two CCDs synchronously in real time.Finally,the full Stokes vector parameters were calculated and images were output by the digital signal processor（DSP）.Experimental results show that the all -state polarization images contain more image information.They will play a huge role in target identification and other applications.

关 键 词：全Stokes矢量 偏振 电光调制 遥感 图像 

分 类 号：P235.2[天文地球—摄影测量与遥感]