变形镜波前补偿能力的空间频域分析

 利用滤波器原理从空间频域分析了连续镜面分立驱动变形镜对波前的补偿能力。将变形镜等效为一高通滤波器，通过数值计算分析了滤波器函数与驱动器密度、高斯指数、交连值等变形镜主要参数的关系，解释了参数变化对波前拟合能力的影响。结果表明：驱动器密度是波前补偿能力的决定因素，增大高斯指数和交连值一定程度上有利于低空间频率波前的补偿。应用中应该根据待补偿波前的特征正确地选择和调整变形镜参数。

Spatial frequency analysis of wavefront compensation capabilities of deformable mirror

Based on the principle of spatial filter,the wavefront compensation capabilities of the continuous surface deformable mirror with discrete actuators were analyzed.As a high-pass spatial filter,the relationships between the filter function and the deformable mirror's parameters, such as actuator density,Gaussian index and coupling,were discussed.The simulation result shows that the actuator density is the decisive factor of wavefront compensation and increasing the Gaussian index or the coupling may profit correcting low order aberrations.This indicates that the choice of deformable mirror's parameters should depend on the incident wavefront in practice.