A wave optics model for the effect of partial coherence on coherent diffractive imaging. (14th January 2021)

• Record Type: Journal Article
• Authors: Zhu, Zhongzhu; Xu, Han; Hu, Lingfei; Li, Ming; Liu, Peng; Dong, Yuhui; Zhou, Liang
• Is Part Of: Journal of synchrotron radiation. Volume 28:Part 2(2021)
• Page Start: 499
• Page End: 504
• Publication Date: 2021-01-14
• Subjects: partial coherence -- wave optics model -- coherent diffractive imaging -- high‐energy photon sources -- Young's double‐slits interference; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577520015684
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A wave optics model is proposed to analyze the effect of partial coherence on coherent diffractive imaging for an actual beamline layout, based on the finite size of the source and the influence of optics on the wavefront. Abstract : 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.