利用空间光调制器实现基于相位多样性的多帧散斑成像  

Multi -Frame Speckle Imaging Based on Phase Diversity Using Spatial Light Modulator

作　　者：王晶 白星 王金超 周昕(指导)[1] WANG Jing;BAI Xing;WANG Jin-chao;ZHOU Xin(Opto-Electronic Department,Sichuan University,Chengdu 610064,China)

机构地区：[1]四川大学电子信息学院光电系,四川成都610064

出　　处：《光学与光电技术》2020年第3期70-74,共5页Optics & Optoelectronic Technology

基　　金：国家自然科学基金(61475104)资助项目

摘　　要：提出了一种利用空间光调制器实现基于相位多样性的散斑成像方法,通过调制空间光调制器(SLM)改变成像系统的孔径函数,记录每次改变时相应的散斑图和孔径函数的变化,然后对记录的多帧结果采用最大似然估计法和拟牛顿算法重建隐藏目标图像。数值模拟结果表明,采用空间光调制器改变非相关成像系统孔径函数的方法,相比以往改变相机位置的方法,能够改善相机位置移动所带来的成像质量下降问题。In this paper,a speckle imaging method based on phase diversity is proposed by using SLM.The aperture function of the imaging system is changed by SLM,the corresponding speckle pattern and aperture function changes are recorded every time,then the hidden target image is reconstructed by using maximum likelihood estimation and quasi Newton algorithm.The numerical simulation results show that the method of using spatial light modulator to change the aperture function of the uncorrelated imaging system,compared with the previous method of changing the camera position,can improve the image quality degradation caused by the camera position movement.

关 键 词：相位多样性 多帧散斑成像 拟牛顿算法 最大似然估计 

分 类 号：TN761[电子电信—电路与系统] TP391.41[自动化与计算机技术—计算机应用技术]