静态阶梯式迈克耳逊干涉仪的风场探测  

Static and Stepped Michelson Interferometer for Measuring Atmospheric Winds

作　　者：张宣妮[1] 

机构地区：[1]咸阳师范学院物理与电子工程学院,陕西咸阳712000

出　　处：《咸阳师范学院学报》2012年第2期20-23,共4页Journal of Xianyang Normal University

摘　　要：针对"四强度法"风场探测需要获得4个相互独立的干涉图,研究了一种静态阶梯式迈克尔逊干涉仪系统,与静态四分区镀膜型不同,该系统利用光学臂的四分区阶梯式跃进产生步进光程差,各相邻分区之间在臂长上依次递增,产生4个相互独立的有一定相位差的干涉光束,四面角锥棱镜四分束并改变它们的传输方向,经成像透镜汇聚在CCD的4个象限分区上,得到4个分离的干涉图,从而可用"四强度法"探测风场。Aimed at that＂four point wind retrieval algorithm＂to measure atmospheric winds need to get four separate interference patterns,A static and stepped Michelson interferometer was put forward.Different from the former four segments coating on one mirror,this system divides one arm end surface of Michelson interferometer into four segments,the arm length of the adjacent segments increase steadily with a step,then generate four separate interferingbeam simultaneously.The interferingbeam is separated into four by a four-sided pyramid prim,and the four interferingbeams have different transmission directions.Pass the imaging lens and gather on the four corresponding segments of CCD,and get four separate interferograms,which can be used to measure the velocity of atmospheric winds and atmospheric temperature by＂four point wind retrieval algorithm＂.

关 键 词：静态阶梯式 四分区 干涉光束 

分 类 号：P425.2[天文地球—大气科学及气象学]