可调光程的差分偏振成像系统及其特性研究

发布时间：2018-06-08 05:48

本文选题：成像系统 + 差分偏振　；参考：《光学学报》2017年07期

【摘要】：基于Wollaston棱镜角剪切和Savart偏光镜横向剪切组合的可调光程的差分偏振干涉成像光谱系统,不仅可同时获取目标正交偏振分量的干涉图和二维空间图,而且可以通过调整Savart偏光镜的厚度,得到不同光程差下正交偏振分量的干涉图像。该系统的显著特点是正交图像的同时获取和光程的实时改变。描述了可调光程的差分偏振干涉成像光谱系统结构、理论原理,推导出了干涉强度表达式。详细分析了可调光程的Savart偏光镜(MSP)和可调光程的宽视场型Savart偏光镜(MWSP)的光程差及横向剪切量的变化范围。通过两种偏光镜之间的对比可得光程差差别甚微但MWSP剪切量较大,且变化量比MSP高50%。这为以后选择Savart偏光镜类型提供了重要依据。
[Abstract]:Based on the combination of angular shearing of Wollaston prism and transverse shearing of Savart polarizer, a differential polarization interferometric imaging system with adjustable optical path can obtain not only the interferogram of the orthogonal polarization component of the target, but also the two-dimensional spatial map. Furthermore, by adjusting the thickness of Savart polarizer, the interference images of orthogonal polarization components under different optical path differences can be obtained. The remarkable features of this system are the simultaneous acquisition of orthogonal images and the real-time change of optical path. The structure of the differential polarization interferometric imaging spectral system with adjustable optical path is described. The theoretical principle and the expression of interference intensity are derived. The range of optical path difference and transverse shearing of tunable Savart polarizer MSPs and wide field of view Savart polarizer MWSPs are analyzed in detail. By comparing the two kinds of polarizers, we can find that the difference of optical path difference is small, but the shear amount of MWSP is larger, and the variation is 50% higher than that of MSP. This provides an important basis for choosing the type of Savart polarizer in the future.
【作者单位】：曲阜师范大学激光研究所山东省激光偏光与信息技术重点实验室;
【基金】：国家自然科学基金(11104160) 曲阜师范大学引进人才科研启动项目(20130760)
【分类号】：O436.3

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