基于组合Wollaston棱镜成像光谱仪的视场扩大原理分析  

Theoretial analysis on extending the field-of-view of the imaging spectrometer based on combined Wollaston prisms

作　　者：吴海英[1] 张淳民[1] 赵葆常[2] 

机构地区：[1]西安交通大学理学院,西安710049 [2]中国科学院西安光学精密机械研究所空间光学实验室,西安710049

出　　处：《物理学报》2009年第2期930-935,共6页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:40537031);国家高技术研究发展计划(863项目)(批准号:2006AA12Z152);国防基础科学研究项目(批准号:A1420080187);国家自然科学基金(批准号:40375010,60278019);陕西省科技计划攻关项目(批准号:2001K06-G12,2005K04-G18);西安交通大学“985”二期电子信息平台资助的课题~~

摘　　要：论述了视场扩大型成像光谱仪的核心部件——组合Wollaston棱镜的结构和分光机理;应用波法线追迹法分析了光在任意方位入射面内,以任意角入射时组合Wollaston棱镜中的波矢传播规律;推导出了光在棱镜中的传播方向及出射点坐标;给出了传播过程中e光和o光之间光程差的理论表达式;采用计算机模拟,给出了光程差随入射角和入射面方位角的变化曲线;在此基础上对组合Wollaston棱镜扩大光谱仪视场的原理进行了深入分析和讨论.上述研究对偏振干涉成像光谱技术的理论研究与技术创新,对自行设计的稳态大视场偏振干涉成像光谱仪的研制和应用都有着十分重大的理论与实践意义.The principle of beam splitting of spectrometer based on the combination of two Wollaston prisms and a half-wave plate is presented. The propagation track of light wave in the combination is analysed by wave normal-tracing method at random incidence angle and the formulas of the path difference between the e and o wave normal are deduced. Computer simulations are carried out to explain why the combination can increase the field of view of spectrometer. The results will provide a very important theoretical basis for the study of polarization interference imaging spectrum technology and the development of static large field of view polarization interference imaging spectrometer developed by us.

关 键 词：WOLLASTON棱镜 偏振干涉成像光谱仪 波法线追迹法 视场扩大原理 

分 类 号：O436.1[机械工程—光学工程]