Quantitative analysis on phase diversity technique based on liquid crystal spatial light modulator

Xiao-ping LI; Wu-sheng HU; Hong-li YU; Zi-hao XU; Pei-guang ZHANG; Cheng-liang YANG; Li XUAN

doi:10.3788/YJYXS20173203.0234

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Quantitative analysis on phase diversity technique based on liquid crystal spatial light modulator

Display and Image | 更新时间：2020-07-07

- Quantitative analysis on phase diversity technique based on liquid crystal spatial light modulator
- Chinese Journal of Liquid Crystals and Displays Vol. 32, Issue 3, Pages: 234-239(2017)
- 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：
- 基金信息：
- DOI：10.3788/YJYXS20173203.0234
  CLC： O439
- Received：16 November 2016，
  
  Accepted：21 November 2016，
  
  Published：2017-03
- 稿件说明：
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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：

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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