静态偏振风成像干涉仪光传输特性和光通量改善

静态偏振风成像干涉仪利用偏振光束来获得干涉图, 光束在偏振元件中的传输特性成为分析研究的关键. Jones矩阵用于分析系统的光学传输特性和偏振态变化过程, 形式简洁,计算方便,容易得出光学元件对系统性能的影响.本文用Jones矩阵对静态偏振风成像干涉仪系统进行了描述, 推导出了适用于普遍情况的系统矩阵表达式,计算出核心偏振元件的偏振化方向和波片方位角对应于系统光通量和干涉调制度的关系,确定了系统中各偏振元件的最佳偏振化方向和波片的最佳方位角; 并通过视场展宽技术和提高四面角锥棱镜的透光率对光通量加以改善,利用光线追迹软件仿真, 对视场展宽前后的干涉强度作了对比,达到预期的效果.为静态偏振干涉成像光谱仪的设计、 研制和工程化提供重要理论和实践指导.

The optical transmission and improvement of flux for the static polarization wind imaging interferometer

The static polarization wind imaging interferometer takes advantage of polarized-light beam to obtain interferogram, and beam transmission characteristic in core polarization components is a key issue. The Jones matrix is convenient and concise for analyzing the optics polarization state, and easy to obtain the relationship of key optical components in the system performance. The Jones matrix is introduced to describe the static polarization interferometer system respectively in a given case and in a general case. The variations of optical flux and interference fringe visibility are investigated as functions of polarization direction and wave plate azimuth associated with the key components, and their optimal values are ascertained. The optical flux can be improved by widening field of view and increasing the transmittance of the pyramid prism. The simulation results of the interference intensities confirm the theoretical expectations.The study provides a theoretical basis and practical guidance for the design, development and engineer of the static polarization wind imaging interferometer.