Open AccessA wave optics model for the effect of partial coherence on coherent diffractive imaging
Author(s) -
Zhu Zhongzhu,
Xu Han,
Hu Lingfei,
Li Ming,
Liu Peng,
Dong Yuhui,
Zhou Liang
Publication year - 2021
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577520015684
Subject(s) - wavefront , optics , coherence (philosophical gambling strategy) , physics , beamline , diffraction , coherence time , image quality , image plane , interference (communication) , synchrotron , computer science , laser , beam (structure) , image (mathematics) , computer network , channel (broadcasting) , quantum mechanics , artificial intelligence
With the development of fourth‐generation synchrotron sources, coherent diffractive imaging (CDI) will be a mainstream method for 3D structure determination at nanometre resolution. The partial coherence of incident X‐rays plays a critical role in the reconstructed image quality. Here a wave optics model is proposed to analyze the effect of partial coherence on CDI for an actual beamline layout, based on the finite size of the source and the influence of the optics on the wavefront. Based on this model, the light field distribution at any plane, the coherence between any two points on this plane and CDI experiments can be simulated. The plane‐wave CDI simulation result also shows that in order to reconstruct good image quality of complex samples the visibility of the interference fringes of any two points in the horizontal and vertical directions of the incident light field at the sample needs to be higher than 0.95.