Phase retrieval from double axially displaced holograms for dual-wavelength in-line holography  

作　　者：李艳 肖文 潘锋 戎路 

机构地区：[1]Key Laboratory of Precision Opto-mechatronics Technology,Ministry of Education,Beihang University [2]College of Applied Sciences,Beijing University of Technology

出　　处：《Chinese Optics Letters》2014年第2期30-33,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.31000387,61177006,and 61307010);China Postdoctoral Research Foundation(No.2013M540828);Beijing Postdoctoral Research Foundation(No.2013ZZ-17)

摘　　要：A phase retrieval method for dual-wavelength in-line digital holography is presented with double axially displaced holograms.A synthetic wavelength is used during iterative propagations to retrieve wrap-free phase distributions with a much extended measurement range.The simulation and experimental results demonstrate a better elimination of the twin image,a faster rate of convergence of the iterative routine and less number of wavelengths are compared with previously reported multiple-wavelength in-line holography.A phase retrieval method for dual-wavelength in-line digital holography is presented with double axially displaced holograms.A synthetic wavelength is used during iterative propagations to retrieve wrap-free phase distributions with a much extended measurement range.The simulation and experimental results demonstrate a better elimination of the twin image,a faster rate of convergence of the iterative routine and less number of wavelengths are compared with previously reported multiple-wavelength in-line holography.

关 键 词：Computer generated holography Iterative methods Phase shifters 

分 类 号：O438[机械工程—光学工程]