Influence of random aspheric parameter errors on the wavefront deformation for segmented primary mirror and its correction

摘要

Segment random aspheric parameter errors will generate uncertain wavefront deformation which can be effectively compensated using segment pose alignment. We propose the linear sensitivity matrix of the wavefront deformation originating from the errors through ray tracing, and deduce the prediction formula of the deformation. The correction and prediction methods using segment pose adjustment to compensate the errors are presented. Numerical simulations results reveal that both the mean square wavefront deformations before and after compensation can be perfectly predicted with the prediction errors of the expectation less than ±2% and of the variance less than ±5%.