Open AccessCoherent diffraction imaging by moving a lens
Author(s) -
Cheng Shen,
Jiubin Tan,
Ce Wei,
Zhengjun Liu
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.016520
Subject(s) - optics , phase retrieval , lens (geology) , oversampling , convolution (computer science) , holography , digital holography , fourier transform , computer science , diffraction , fast fourier transform , phase (matter) , wavefront , ptychography , coherent diffraction imaging , iterative reconstruction , algorithm , computer vision , artificial intelligence , physics , artificial neural network , computer network , bandwidth (computing) , quantum mechanics
A moveable lens is used for determining amplitude and phase on the object plane. The extended fractional Fourier transform is introduced to address the single lens imaging. We put forward a fast algorithm for the transform by convolution. Combined with parallel iterative phase retrieval algorithm, it is applied to reconstruct the complex amplitude of the object. Compared with inline holography, the implementation of our method is simple and easy. Without the oversampling operation, the computational load is less. Also the proposed method has a superiority of accuracy over the direct focusing measurement for the imaging of small size objects.