基于液晶空间光调制器的相位差波前探测技术定量研究

发布时间：2018-03-09 05:32

本文选题：相位差探测技术　切入点：波前探测　出处：《液晶与显示》2017年03期 　论文类型：期刊论文

【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0.1λ~0.5λ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)λ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0.306λ的随机波前像差,探测波前的残余误差为0.091λ,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]:To quantitatively study the phase difference wavefront detection (phase diversity technique, PD) of wavefront detection and image reconstruction accuracy, this paper gives the numerical simulation and related experiments. The numerical simulation using the RMS (root-mean-square, RMS) respectively into five groups randomly distorted wavefront 0.1 lambda lambda ~0.5, the degradation of coke face image and the corresponding defocus image information, wavefront detection and image reconstruction based on PD technology, RMS residual error of wavefront detection value reached 10~ (-5) is improved significantly in the level of image resolution and contrast. On the experimental system is built based on liquid crystal spatial light modulator, using liquid crystal a spatial light modulator to apply quantitative wavefront random, can effectively solve the turbulence screen data difficult to quantify the problem. The same PD technology will be used in this experiment collected degradationand focal plane image and The corresponding defocused image, the RMS value is 0.306. The random wavefront aberration, wavefront residual error is 0.091 lambda, image reconstruction results and simulation results are highly consistent, analyzed a variety of factors may lead to errors in the experiment of this paper lists and at the same time as the technology is applied to the liquid crystal system has accumulated technology base.

【作者单位】：济源职业技术学院;中国科学院长春光学精密机械与物理研究所;中国科学院研究生院;
【基金】：国家自然科学基金(No.61405194)~~
【分类号】：TN761

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