基于液晶空间光调制器的相位差波前探测技术定量研究

李小平; 胡五生; 于洪丽; 徐梓浩; 张佩光; 杨程亮; 宣丽

doi:10.3788/YJYXS20173203.0234

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基于液晶空间光调制器的相位差波前探测技术定量研究

显示与图像 | 更新时间：2020-07-07

- 基于液晶空间光调制器的相位差波前探测技术定量研究
- Quantitative analysis on phase diversity technique based on liquid crystal spatial light modulator
- 液晶与显示 2017年32卷第3期页码：234-239
- 作者机构：
  
  1.济源职业技术学院, 河南济源 459000
  2.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  3.中国科学院研究生院, 北京 100049
- 作者简介：
  
  [ "李小平(1975-),女,河南济源人,副教授,主要研究液晶自适应光学和光学设计。E-mail:humengjia@126.com" ]
  E-mail:ycldahai@gmail.com
- 基金信息：
  
  国家自然科学基金(No.61405194);Supported by National Natural Science Foundation of China(No.61405194)
- DOI：10.3788/YJYXS20173203.0234
  中图分类号： O439
- 收稿日期：2016-11-16，
  
  录用日期：2016-11-21，
  
  纸质出版日期：2017-03
- 稿件说明：
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李小平, 胡五生, 于洪丽, 等. 基于液晶空间光调制器的相位差波前探测技术定量研究[J]. 液晶与显示, 2017,32(3):234-239.

Xiao-ping LI, Wu-sheng HU, Hong-li YU, et al. Quantitative analysis on phase diversity technique based on liquid crystal spatial light modulator[J]. Chinese journal of liquid crystals and displays, 2017, 32(3): 234-239.
李小平, 胡五生, 于洪丽, 等. 基于液晶空间光调制器的相位差波前探测技术定量研究[J]. 液晶与显示, 2017,32(3):234-239. DOI： 10.3788/YJYXS20173203.0234.

Xiao-ping LI, Wu-sheng HU, Hong-li YU, et al. Quantitative analysis on phase diversity technique based on liquid crystal spatial light modulator[J]. Chinese journal of liquid crystals and displays, 2017, 32(3): 234-239. DOI： 10.3788/YJYXS20173203.0234.

摘要

为了定量研究相位差波前探测技术（phase diversity technique，PD）对波前探测和图像重建的精度，本文分别进行了数值模拟以及相关实验。数值模拟中采用了均方根（root-mean-square，RMS）分别为0.1

~0.5

的五组随机畸变波前，获得其退化的焦面图像和相应的离焦图像信息，利用PD技术对其进行波前探测和图像重建，波前探测的残余误差RMS值均达到了10

－5

水平，重建图像在分辨率和对比度上有明显提升。搭建了基于液晶空间光调制器的实验系统，利用液晶空间光调制器来定量施加随机的波前像差，可以有效解决湍流屏数据难以量化的问题。同样将PD技术应用于本实验所采集到的退化焦面图像和相应离焦图像，对于RMS值为0.306

的随机波前像差，探测波前的残余误差为0.091

，图像重建结果与模拟结果高度一致，本文列举并分析了可能造成实验误差的多种因素，同时为该技术应用于液晶系统积累了技术基础。

Abstract

In order to study phase diversity (PD) technique quantitatively

numerical simulations and experiments has been performed. In numerical simulations

0.1

~0.5

root-mean-square (RMS) random phase aberrations are used to investigate the PD technique from images degraded by these random phase aberrations. Root-mean-square errors (RMSE) of phase aberrations detected by PD is less than 10

－5

and the reconstructed images become much better than the degraded focus-plane images.An experimental system based on Liquid Crystal Spatial Light Modulator (LC-SLM) is established

and the problem of lacking quantitative data for atmospheric turbulence phase screen can be solved effectively. RMSE of the phase aberrations of the experimental data is 0.091

for which the RMS of original phase aberrations is 0.306

.The estimated wave-front is very similar to original phase aberrations. The experimental and simulation results agree well.Several reasons are also analyzed which could result in experimental error

and this work also gets technical experiences for the application of PD technique in liquid crystal adaptive system in future.

关键词

Keywords

references

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