激光与光电子学进展, 2015, 52 (8): 080101, 网络出版: 2015-07-29
旋转相位屏模拟大气湍流时空特性的测量 
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Measurement of Temporal and Spatial Characteristics of Atmospheric Turbulence Simulated by a Rolling Phase Screen
大气光学 自适应光学 湍流模拟 相位屏 大气相干长度 时间常数 atmospheric optics adaptive optics turbulence simulation phase screen atmospheric coherence length time constant
摘要
利用一个高速多单元哈特曼传感器对旋转相位屏模拟大气湍流的空间特性和时间特性进行了研究.空间特性方面,计算了湍流的大气相干长度和波面的相位空间结构函数,对比了波前的Zernike 系数方差分布.时间特性方面,测量了模拟湍流的Greenwood 频率和时间功率谱,并提出了一种新的计算时间常数的方法——残差均方值法.结果表明旋转相位屏模拟的大气湍流符合Kolmogorov 湍流统计理论.
Abstract
Using high-speed,multi-cell Shack-Hartman wave-front sensor,the measurement of temporal and spatial feature to a rolling phase screen laboratory atmospheric turbulence generator is presented.In terms of spatial feature,coherence length of the atmospheric turbulence and phase spatial structure function of the wave-front are calculated,and the variance distribution of the wave-front Zernike coefficient is compared to the theory as well.In addition,on the temporal feature,the Greenwood frequency and time power spectrum of the simulated turbulence are analyzed.A new method that is called residual variance algorithm to calculate the time constant is proposed.The result shows that the atmospheric turbulence generated by the rolling phase screen is consistent with the Kolmogorov turbulence.
谭涛, 罗奇, 谭毅, 刘超, 李新阳. 旋转相位屏模拟大气湍流时空特性的测量[J]. 激光与光电子学进展, 2015, 52(8): 080101. Tan Tao, Luo Qi, Tan Yi, Liu Chao, Li Xinyang. Measurement of Temporal and Spatial Characteristics of Atmospheric Turbulence Simulated by a Rolling Phase Screen[J]. Laser & Optoelectronics Progress, 2015, 52(8): 080101.
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