基于偏振阵列的偏振迈克耳孙风场探测干涉仪系统的理论研究

基于偏振阵列的偏振迈克耳孙风场探测干涉仪是一种新型的探测大气温度和风场速度的干涉仪.基于偏振干涉的原理,四个偏振方向分别相差45°的偏振片组成的偏振阵列紧贴于探测器前,由四面角锥棱镜出射的四束线偏振光分别经四个不同偏振方向的偏振片后,四个不同强度干涉图同时成像于探测器上,经过数据提取获得四个干涉强度值,进一步反演出大气温度和风场速度值.对以上干涉成像过程进行了模拟仿真,得到干涉图,经风速反演得到了与实际值一致的结果.具有结构简单稳定,测试精度高,利于快速变化的目标测试的优点.

Study on Theory of Polarizing Michelson Interferometer for Wind Measurement Based on Polarizing Arrays

The polarizing Michelson interferometer of wind measurement based on polarization arrays is a interferometer for detecting atmosphere temperature and wind velocity. It is based on the principle of polarization interference. Four polarizers whose polarization orientation has an interval of 45° in turn attach to the front of detector. Four beams of light from four-plate pyramid prism pass polarizers. Then four different interferential intensities are formed at the same time on the detector. Then wind velocity and atmosphere temperature will be deduced from the intensities. This imaging process is simulated and emulated. The result after data processing is coincident with true value. The interferometer offers advantages including simple and steady construction and high precision. It is fit for detecting fast goal.