空间调制成像光谱仪调制度分析

毕业论文空间调制成像光谱仪调制度分析学生姓名：学号：学院：专业：指导教师：2010年6月中文摘要第I页共III页空间调制成像光谱仪调制度分析摘要本文系统的阐述了干涉成像光谱仪的发展背景、国内外研究现状以及重要应用。以时间调制型Michelson干涉成像光谱仪为例详细介绍了干涉成像光谱学的基础理论以及调制度的概念；文中对干涉成像光谱仪的两种经典类型(即时间调制干涉成像光谱仪和空间调制干涉成像光谱仪)的工作原理、结构及其特点进行了总结。在此基础上，着重对三种典型的空间调制干涉成像光谱仪(即静态Michelson干涉成像光谱仪、基于Wollaston棱镜的偏振干涉成像光谱仪以及大横向剪切量空间调制干涉成像光谱仪)的工作原理、结构特点、横向剪切或角剪切原理、光程差计算以及调制度的推导进行了研究分析。讨论了探测器单元尺寸、平面反射镜倾斜角以及Wollaston棱镜楔角等因素对干涉条纹调制度的影响，并建立了相应的数学模型。根据调制度的临界条件，对影响调制度的各参数的取值做了进一步的讨论分析。本文的研究可以为空间调制干涉成像光谱仪的设计、研制和调试提供了理论依据。关键词：空间调制干涉成像光谱技术，傅里叶变换光谱仪，调制度英文摘要第II页共III页AnalysisofthemodulationdepthofspatiallymodulatedFourier-transformspectrometerABSTRACTInthepaper,thedevelopment,theresearchandapplyingsituationofFourier-transformspectrometer(FTS)areproposedsystematically.ThebasicprinciplesofFourier-transformimagingspectroscopyarediscussedbytheexampleofthetemporarilymodulatedMichelsonFourier-transformimagingspectrometer.TheconceptofModulationDepthisalsointroduced.Theessentialprinciples,basicconfigurationandadvantagesofthetwoclassicFourier-transformspectrometersareanalyzedhere,whicharetemporarilymodulatedandspatiallymodulatedFourier-transformimagingspectrometer.Theworkingprinciples,configurations,principlesofthelateralshearingorangelshearingbeamsplitter,calculationsofopticalpathdifferenceandthederivationofmodulationdepthofthethreespatiallymodulatedFourier-transformimagingspectrometersthatarethestaticMichelsonFTS,thepolarizationFTSbasedonWollastonprismandtheclassofSignacspatiallymodulatedFTSareespeciallyproposedandanalyzed.ThentheeffectsonthedegreeofthemodulationbythedimensionoftheCCDarray,thetiltangleofthemirror,thewedgeangleofWollastonprismarediscussedinthepaper.AndthecorrespondingmathematicalmodeltothemodulationsofthethreespatiallyFTSareintroduced.Accordingtothecriterionsofthemodulationdepth,thevaluesoftheseeffectsareobtained.Thisstudyprovidesatheoreticalguidanceforthestudy,thedesignandmodulationofthespatiallymodulatedFourier-transformimagingspectrometer.Keywords:spatiallymodulatedFourier-transformspectroscopy,Fourier-transformimagingspectrometer,modulationdepth清华大学2010届毕业论文第III页共III页目录中文摘要..........................................................................................................................Ⅰ英文摘要..........................................................................................................................Ⅱ1绪论...............................................................................................................................11.1干涉成像光谱仪发展背景.......................................................................................11.2干涉成像光谱仪研究现状与重要应用..................................................................21.3本论文的主要研究内容...........................................................................................32干涉成像光谱技术.....................................................................................................42.1干涉成像光谱学理论基础.......................................................................................42.1.1干涉仪和干涉图....................................................................................................42.1.2干涉光谱学基本方程............................................................................................52.1.3仪器线性函数与光谱分辨率................................................................................62.1.4干涉图采样理论....................................................................................................72.1.5干涉图成像光谱仪的调制度................................................................................82.2干涉成像光谱仪的类型及其特点..........................................................................92.2.1时间调制干涉成像光谱仪....................................................................................92.2.2空间调制干涉成像光谱仪..................................................................................102.2.2.1Sagnac型干涉成像光谱仪..............................................................................102.2.2.2基于Wollaston棱镜的偏振干涉成像光谱仪..............................................122.3本章小结..................................................................................................................163三种典型干涉成像光谱仪的调制度分析..............................................................173.1静态Michelson干涉成像光谱仪调制度分析.....................................................173.2基于Wollaston棱镜的偏振干涉成像光谱仪调制度分析.................................223.3大横向剪切量空间调制成像光谱仪调制度分析...............................................273.4本章小结..................................................................................................................314全文总结....................................................................................................................32参考文献..........................................................................................................................34致谢...................................................................................................................................37清华大学2010届毕业论文第1页共37页第一章绪论成像光谱技术是融成像技术与光谱技术于一体的一种光学遥感探测技术[1]，它能够在连续光谱段上对同一目标成像，同时获取目标的形影信息和光谱信息，反映出被观测目标的几何