哈特曼测量大气相干长度研究  

Research on measurement of atmospheric coherence length using Shack-Hartmann wavefront sensor

作　　者：黄德权[1,2] 周文超[1,2] 邱红 张建柱[4] 云宇[1,2] 田小强[1,2] 

机构地区：[1]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳621999 [2]中国工程物理研究院应用电子学研究所,四川绵阳621999 [3]成都光明光电股份有限公司,成都610100 [4]北京应用物理与计算数学研究所,北京100094

出　　处：《强激光与粒子束》2014年第8期11-16,共6页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：研究了利用哈特曼波前传感器测量大气相干长度的两种方法:一种是测量两个子孔径恒星光波到达角起伏方差的差分像运动法;另一种是测量恒星波前分布,通过波前分布的剩余方差推算得到大气相干长度。试验测量结果表明,两种方法得到的测量结果基本一致,得到了大气相干长度的可靠数据,两种方法得到了相互验证,实现了在应用哈特曼波前传感器测量大气波前分布时,同时得到当前的大气信息,对分析哈特曼波前传感器的测量结果有参考意义。Atmospheric coherence length is a very important parameter in the study of effect of atmospheric turbulence on the astronomical observation and laser propagation. Two methods of measurement of atmospheric coherence length using the Shack-Hartmann wavefront sensor are studied. One is differential image motion measure which measures the optical wave＇s an gle-of-arrival fluctuation of two subapertures. The other is to measure the wavefront distribution of stars, and the atmospheric co herence length is obtained by the residual variance of wavefront distribution. The experiment results show that the measurement results obtained by the two methods are consistent, and reliable data of atmospheric coherence length are obtained, so both meth- ods can validate each other. The method measuring wavefront distribution and getting the current atmosphere information at the same time is achieved, and the analysis of the measurement results have reference value.

关 键 词：大气光学 大气相干长度 哈特曼波前传感器 差分像运动法 波前测量 

分 类 号：TN247[电子电信—物理电子学]