自适应光学系统时间带宽和空间带宽的匹配

Matching Between Temporal Bandwidth and Spatial Bandwidth of an Adaptive Optics System

自适应光学系统存在时间带宽和空间带宽。为了有效地利用自适应光学系统的系统资源，必须使这两种带宽匹配。本文通过经系统校正后的剩余波前扰动相位的均方差与系统时间带宽和空间带宽的关系，研究了在不同条件下系统时间带宽和空间带宽的匹配问题。分析结果表明，在一定的系统时间延迟，探测噪声水平和大气条件下，自适应光学系统存在一个最佳时间带宽和最佳空间带宽。

An adaptive optics system has temporal bandwidth and spatial bandwidth.In order to effectively use the performances of the adaptive optics system,the above two bandwidths must be matched.The matching between the temporal bandwidth and spatial bandwidth of an adaptive optics system under the different conditions is investigated by means of the relations between the mean square deviation of the residual wavefront disturbance phase corrected by the system and the temporal spatial bandwidths of the system.The analysis results show that under the conditions of a constant system time delay,detecting noise level and atmosphere,an adaptive optics system has an optimal temporal bandwidth and spatial bandwidth.