偏振干涉成像光谱仪中Wollaston棱镜光程差及条纹定位面的精确计算与分析  

Calculation of the optical path difference and fringe location in polarization interference imaging spectrometer

作　　者：穆廷魁[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710068

出　　处：《物理学报》2009年第6期3877-3886,共10页Acta Physica Sinica

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

摘　　要：论述了基于单Wollaston棱镜的偏振干涉成像光谱仪的基本原理;采用波法线追迹方法,对光以4种不同入射方式经过偏振干涉成像光谱仪中单Wollaston棱镜的精确光程差、分束角及干涉条纹定位面进行了计算,并给出它们与棱镜楔角、入射角及入射位置之间的理论公式;采用计算机模拟对光程差、分束角及条纹定位面的精确值和近似值进行分析与比较,结果表明精确值和近似值之间存在较大差异;当棱镜楔角、入射角及入射位置增大时,精确值和近似值之间的偏离量随之增大;利用得到的精确值分析了条纹定位面的偏离量及其对傅里叶透镜成像的影响,并推演了应用于偏振干涉成像光谱仪的单Wollaston棱镜的尺寸和入射角的选择范围.该研究为新型偏振干涉成像光谱技术的理论研究和成像光谱仪的设计、研制、调试和工程化提供了重要的理论依据和实践指导.The principle of a polarization interference imaging spectrometer based on Wollaston prism is presented. The accurate optical path difference, splitting angle and fringe location plane of single Wollaston prism in four different conditions are calculated by wave-normal tracing method, and the theoretical formulas are introduced. The accurate values and approximate values of the optical path difference, the splitting angle, the fringe location are compared by computer simulation. The results show that the influences of wedge angle, incident angle and incident position on the accurate values and the approximate values are greatly different. The selection range of the wedges angle and the incident angle are deduced according to the accurate value, and the deviation of fringe location plane and its influence on Fourier transform lens are analysed. This study provides a theoretical and practical guidance for the study, design, modulation, experiment and engineering of the polarization interference imaging spectrometers.

关 键 词：偏振干涉成像光谱仪 WOLLASTON棱镜 光程差 条纹定位面 

分 类 号：O436.3[机械工程—光学工程]