超光谱全偏振成像仪中的液晶偏振态分析器的优化设计
关键词 高光谱成像 全偏振 铁电液晶 液晶可变相位延迟器
毕业论文设计说明书外文摘要
Title A optimal design of liquid crystal polarization analyzer of Hyperspectral imaging full polarimetry
Abstract
Hyperspectral imaging full polarimetry can achieve a method of real-time measuring the spectrum, polarization and the target image. The optimal design over a broad spectral range of Liquid Crystal (LC) based Polarization State Analyzers (PSA), requires detailed knowledge of the spectral behavior of the LCs. Two LC technologies are investigated here, Ferroelectric LC (FLC), and Liquid Crystal Variable Retarders (LCVR). A PSA is capable of measuring the Stokes vector of a polarization state, This ability needs the condition number of these system matrices, , close to optimal performance in a suitable wide spectral range. I present here both a method to do this optimization using a genetic algorithm, as well as simulation results. This paper introduces the background, significance and theoretical basis of hyperspectral imaging full polarimetry on this basis, proposes a optimal design of liquid crystal polarization analyzer of a wide range(430-900 nm and 900-1700 nm) using a genetic algorithm. Our results include a arithmetic design of liquid crystal polarization analyzer of a wide range, respectively based on 2 Ferroelectric Liquid Crystals and Polarization State Analyzers, whose material properties are taken from measured values.
Keywords Hyperspectral imaging Full polarimetry Ferroelectric Liquid Crystal
Liquid Crystal Variable Retarders
目 次
1 绪论 1
1.1 超光谱全偏振成像技术简介 1
1.2 超光谱全偏振成像技术的背景与意义 1
1.3 国内外超光谱全偏振成像技术的发展与现状 1
2 超光谱全偏振成像技术的理论基础 2
2.1 光谱和偏振成像技术的基本原理 2
2.2 干涉型超光谱全偏振成像仪的系统模型和工作原理 2
2.3 宽波段液晶偏振态分析器的结构形式 3
3 宽波段FLC偏振态分析器的优化设计 5
3.1 算法处理 5
3.2 遗传优化 8
3.3 结果 10
4 宽波段LCVR偏振态分析器的优化设计 15
4.1 算法处理 15
4.2 结果 17
结 论 20
致 谢 21
参考文献22
1 绪论