具有立方相位掩膜的波前编码系统的离轴斯特列尔比

Nonaxial Strehl ratio of wavefront coding systems with a cubic phase mask.

作者信息

Chen Shouqian, Fan Zhigang, Chang Hong, Xu Zhigao

机构信息

Research Center for Space Optics Engineering, P.O. Box 307, Harbin Institute of Technology, Heilongjiang, Harbin 150001, China.

出版信息

Appl Opt. 2011 Jul 1;50(19):3337-45. doi: 10.1364/AO.50.003337.

DOI:10.1364/AO.50.003337

PMID:21743538

Abstract

An approximate expression of the peak position of the point-spread function (PSF) of wavefront coding systems with a cubic phase mask (CPM) is derived and verified by simulation results. An approach called the nonaxial Strehl ratio (NASR) is used to evaluate the performance of wavefront coding systems with defocus aberrations. The characteristics of the NASR are investigated. The relationships between the NASR and the similarity of out-of-focus modulation transfer function (MTF) and recoverability of blurred encoding images are presented, and some useful guidelines are given for the optimization of phase mask parameters according to these relationships.

摘要

推导了具有立方相位掩模（CPM）的波前编码系统点扩散函数（PSF）峰值位置的近似表达式，并通过仿真结果进行了验证。采用一种称为非轴向斯特列尔比（NASR）的方法来评估具有离焦像差的波前编码系统的性能。研究了NASR的特性。给出了NASR与离焦调制传递函数（MTF）相似性以及模糊编码图像可恢复性之间的关系，并根据这些关系给出了一些优化相位掩模参数的有用指导。