子孔径划分对波前重构矩阵病态程度的影响

 自适应光学中，对于一定的变形镜，波前探测器子孔径的划分方式将对波前重构产生影响。本文就这个问题开展了计算机模拟研究。用直接斜率法进行波前重构，采用最小二乘解，并用波前重构矩阵的条件数作为其病态程度的判据。模拟结果表明，子孔径数目的选择对波前重构矩阵的病态程度起决定性的作用；适当的子孔径划分方式可以使波前重构矩阵病态程度大大降低。

MORBIDITY STUDY OF WAVEFORNT-RECONSTRUCTION-MATRIX INFLUENCED BY SUBAPERTURE PARTITION

The wavefront reconstructing is bound to be influenced by the subaperture partition manner based on certain deformable mirror in adaptive optics. This paper takes account of this issue. Zonal wavefront reconstructing model is adopted, the least-squares solution is applied, and the condition number of wavefront-reconstruction-matrix is used to estimate how its morbidity is. The computer simulation results indicate that the morbidity is mainly influenced by the number of subapertures; appropriate manner of subaperture partition may greatly decrease the degree of the morbidity.