Open AccessPtychography imaging by 1-D scanning with a diffuser
Author(s) -
Wen Xiu,
Yong Geng,
Xuyang Zhou,
Jiubin Tan,
Shutian Liu,
Cuimei Tan,
Zhengjun Liu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.399184
Subject(s) - ptychography , diffuser (optics) , optics , phase retrieval , computer science , speckle pattern , diffraction , aperture (computer memory) , image quality , iterative reconstruction , resolution (logic) , computer vision , physics , artificial intelligence , acoustics , fourier transform , image (mathematics) , light source , quantum mechanics
It is beneficial to improve the resolution by a diffuser in imaging systems, because higher frequency information could be involved into the captured patterns via scattering effect. In this paper, a lensless imaging method is designed by 1-D scanning. A diffuser is placed upstream of the object, which is translated in a one-dimensional path and corresponding positions are corrected by cross-correlation. Our method requires a diffraction pattern of the object without a diffuser to speed up convergence and improve resolution. In field reconstruction, the amplitude constraint is added into the iterative phase retrieval algorithm. The high-quality complex-valued images can be obtained with ∼15 patterns. As a ptychography, the proposed method only needs a 1-D device, which could simplify the experimental equipment for reducing costs and measurement time.