自适应光学系统波前校正残余误差的功率谱分析方法

Analysis of Closed Loop Wavefront Residual Error of Adaptive Optical System Using the Method of Power Spectrum

采用比较自适应光学系统闭环校正前后时间功率谱的方法, 对自适应光学系统的波前校正残余误差进行了分析。在注意系统噪声时, 实测的闭环波前复原相位误差与实际波前校正残余误差是有区别的, 分析了两者功率谱的差别之后, 提出了一种估计实际波前校正残余误差的方法。应用这种方法对1.2

Closed loop wavefront residual error of adaptive optical system consists of the uncompensated turbulence error and closed loop noise. The measured closed loop wavefront residual error is analyzed by using open loop and closed power spectrum. When the system noise is considered, the measured reconstructed phase error and the closed loop wavefront residual error are different. Based on the difference of their power spectrum, a method of evaluating the closed loop wavefront residual error is proposed. The comparison of the reconstructed phase error, which is calibrated in high resolution adaptive optical system of 1.2 m telescope, and the closed loop wavefront residual error is given.