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利用高灵敏度湍流探空仪的测量结果,给出了几种典型情况下大气湍流的特征模式。着重讨论冬、夏两季平面波通过大气湍流对有限带宽的自适应光学补偿系统的影响。分析了当自适应光学闭环的频率响应传递函数为H(f)时,不同带宽波前系统的补偿效果。结果表明:当系统带宽为40Hz时,Strehl比可高于0.85。冬季虽高空风速强于40m/s,但Strehl比没有显著减小。
Using the results of the highly sensitive turbulence radiosonde, several typical modes of atmospheric turbulence are given. This paper focuses on the influence of plane wave propagating through the atmosphere on the adaptive optical compensation system with limited bandwidth in winter and summer. The compensation effects of different bandwidth wavefront systems are analyzed when the frequency response transfer function of the adaptive optical closed-loop is H (f). The results show that the Strehl ratio can be higher than 0.85 when the system bandwidth is 40Hz. Although the wind speed in winter was higher than 40m / s, the Strehl ratio did not decrease significantly.