Instability of Solution of Phase Retrieval in Direct Diffraction Phase-Contrast Imaging with Partially Coherent X-Ray Source  

作　　者：郭华 韩申生 

机构地区：[1]Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 [2]College of Mathematics, Jilin University, Changchun 130012

出　　处：《Chinese Physics Letters》2006年第12期3259-3262,共4页中国物理快报（英文版）

基　　金：Supported by the Natural Science Foundation of Shanghai under Grant No 04ZR14146 and the National Natural Science Foundation of China under Grant No 60477007.

摘　　要：The theoretical model of direct diffraction phase-contrast imaging with partially coherent x-ray source is expressed by an operator of multiple integral. It is presented that the integral operator is linear. The problem of its phase retrieval is described by solving an operator equation of multiple integral. It is demonstrated that the solution of the phase retrieval is unstable. The numerical simulation is performed and the result validates that the solution of the phase retrieval is unstable.The theoretical model of direct diffraction phase-contrast imaging with partially coherent x-ray source is expressed by an operator of multiple integral. It is presented that the integral operator is linear. The problem of its phase retrieval is described by solving an operator equation of multiple integral. It is demonstrated that the solution of the phase retrieval is unstable. The numerical simulation is performed and the result validates that the solution of the phase retrieval is unstable.

关 键 词：RECONSTRUCTION ALGORITHMS RECURSIVE ALGORITHM INTENSITY MAGNITUDE OBJECTS SYSTEM 

分 类 号：O434.19[机械工程—光学工程] TB867[理学—光学]