宽波段铁电液晶偏振态分析器的优化设计  

Optimal Design for Broadband Polarization State Analyzer of Ferroelectric Liquid Crystal

作　　者：李建欣[1] 刘勤[1] 周建强[1] 柏财勋 许逸轩 袁恒[1] 刘杰[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《光学学报》2017年第7期273-283,共11页Acta Optica Sinica

基　　金：国家自然科学基金(61475072);国家重大科学仪器设备开发专项(2013YQ150829);中央高校基本科研业务费专项基金(30916014112-010)

摘　　要：铁电液晶偏振态分析器(PSA)是宽波段偏振成像的核心组件,其抑制噪声的能力对偏振测量结果具有重要影响,因此解决宽波段铁电液晶PSA优化设计问题具有重要意义。根据宽波段偏振成像测量的基本原理推导出铁电液晶PSA的斯托克斯测量矩阵,采用遗传算法和条件数(CN)、同样加权方差(EWV)评价准则对偏振器件的方位角参数进行优化设计,得到铁电液晶PSA的最佳器件组合方式和方位角参数。最后,根据优化设计结果搭建多波段实验装置,对3D眼镜和偏振片进行成像测量实验。实验结果表明利用所设计方法实现的偏振测量装置能够有效测量出目标的偏振特性。Polarization state analyzer（PSA）of ferroelectric liquid crystal is the core component for broadband polarization imaging.The ability of suppressing noise highly affects the polarization measurement results.Therefore,solving optimal design problem of broadband PSA of ferroelectric liquid crystal has a great significance.The Stokes measurement matrix of the PSA of ferroelectric liquid crystal is deduced in terms of the basic principle of broadband polarization imaging measurement.The azimuth parameters of polarization devices are optimized by genetic algorithm,evaluation criteria of condition number（CN）and equally weighted variance（EWV）.The optimal device combination and optimal azimuth parameters of PSA of ferroelectric liquid crystal are obtained.Finally,a multi-band experimental device is set up according to the results of optimal design.The imaging experiments are carried out by measuring the3 D glasses and the polarizer.The experimental results show that the polarization measurement device,which is designed by the proposed method,can effectively measure the polarization characteristic of the targets.

关 键 词：物理光学 偏振态分析器 铁电液晶 遗传算法 优化设计 

分 类 号：O436[机械工程—光学工程]