低阶模式校正自适应光学系统的补偿效果分析

Analysis of Compensation Effectiveness for Adaptive Optical System Used as Low-Order Modes Correction

引入规格化的相位谱［不一定为科尔莫戈罗夫（Ｋｏｌｍ ｏｇｏｒｏｖ）谱］， 推导了大气湍流相位结构函数、低阶模式校正后的残余相位结构函数以及长曝光光学传递函数（ＯＴＦ）。分别给出了在各种不同大气湍流强度ρ０、不同相位谱空间频率的指数下降因子β时， 大气湍流相位波前低阶模式完全校正后和倾斜部分校正时的长曝光光学传递函数（ＯＴＦ）、长曝光斯特列尔（Ｓｔｒｅｈｌ）比和半高全宽（ＦＷＨＭ）的数值计算结果。

Phase structure function, residual phase structure function and long exposure optical transfer function (OTF) of an adaptive optical system used as low order modes correction are deduced by introducing the generalized phase spatial spectrum when low order modes are corrected. Numerical results of long exposure OTF, Strehl ratio and FWHM for different ρ 0, which shows the state of atmospheric turbulence, and different β, which is the power law exponent of phase power spectrum, are presented.