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针对波前曲率传感自适应光学,对比分析了直接拟合法和拉普拉斯算子本征模式法两种闭环控制方法。简要分析了两种方法的基本原理,并建立了36单元曲率型自适应光学仿真模型,进行了大气湍流波前畸变闭环校正数值仿真。结果表明,与直接拟合法相比,存在最佳模式数量使得拉普拉斯算子本征模式法具有更高的稳定性和精度;尤其是当波前畸变较大时,直接拟合法的稳定性和校正精度明显变差。
Aiming at the wavefront sensing adaptive optics, two closed-loop control methods, direct fitting method and Laplacian eigenmode method, are compared and analyzed. The basic principles of the two methods are briefly analyzed. A 36-unit curvature-type adaptive optical simulation model is established, and the numerical simulation of atmospheric turbulence wave front distortion closed-loop correction is carried out. The results show that Laplacian eigenmodes method has higher stability and accuracy than the direct fitting method. Especially when the wavefront distortion is large, the direct fitting method is stable The accuracy of the sex and correction is significantly worse.