液晶调制的宽波段偏振分析器设计研究

摘要高光谱偏振成像仪可以获取成像目标的空间信息、光谱信息和偏振信息，实现四维全光信息的一体化获取，有效增加目标感知和全面分析的手段。在干涉型高光谱成像仪中加入基于液晶调制器的偏振态分析器，在获取干涉成像信息的同时可以同步获取高分辨率的偏振成像信息，是一种具有很好应用前景的技术方法。本文回顾了高光谱偏振分析器的国内外发展历史，介绍了基于液晶调制的偏振分析器的发展历史和研究现状；研究了偏振分析器的原理，装置器件为两块铁电液晶相位调制器，两片相位延迟片和一片线偏振器件，相对于偏振片的投射轴而言，每个波片都有一个延迟δ和偏转角θ。通过改变液晶器件的快轴角度或相位延迟量，实现输入光束的全偏振测量；优化过程中本课题采用遗传算法（GA）设计Matlab计算程序。GA模拟群体的演变以便找到问题的最优解，实现偏振态分析器的优化设计。79013

毕业论文关键词宽波段偏振态分析器遗传算法铁电液晶

毕业设计说明书外文摘要

Title Design research of wideband polarization analyzer based on liquid crystal modulation

Abstract Hyperspectral polarization imaging system can get the spatial information, spectral information and polarization information of the imaging target, realizing the integration acquisition of the four dimensional all optical information, and effectively increasing the means of objective perception and comprehensive analysis。 In the interference type hyperspectral imager, polarization state analyzer is added based on liquid crystal modulator, at the same time of acquiring interferometric imaging information, the polarization imaging information with high resolution can be acquired in a synchronized manner, which is a technical method with very good application prospect。 This paper reviews the domestic and foreign development history of hyperspectral polarization analyzer and introduces the development history and the research status of polarization analyzer based on liquid crystal modulation; and it studies the principle of the polarization analyzer, the device components are two ferroelectric liquid crystal phase modulators, two pieces of phase delay plate and a piece of linear polarizer device, relative to the projection axes of polarizing film, each wave plate has a delay δ and the deflection angle θ。 By changing the fast axis angle or phase delay amount of the liquid crystal device, the full polarization measurement of the input light beam can be realized; this project uses genetic algorithm (GA) to design the Matlab calculation program in the process of optimization。 GA simulates the evolution of the population in order to find the optimal solution of the problem, which achieves the optimal design of the polarization state analyzer。

Keywords Wide-band polarization analyzer GA ferroelectric liquid crystal

1 引言 1

1。1 课题的研究背景 1

1。2 国内外研究现状 3

1。3 本论文的主要研究内容 4

2 宽波段液晶偏振态分析器理论基础 6

2。1 偏振态分析器系统模型 6

2。1。1 斯托克斯矢量法 7

2。1。2 偏振光谱的测量 8 液晶调制的宽波段偏振分析器设计研究:http://www.youerw.com/tongxin/lunwen_91193.html