Dynamic coherent diffractive imaging using unsupervised identification of spatiotemporal constraints

Dynamic coherent diffractive imaging (CDI) reveals the fine details of structural, chemical, and biological processes occurring at the nanoscale but imposes strict constraints on the object distribution and illumination. Ptychographic CDI relaxes these constraints by exploiting redundant information...

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Bibliographic Details
Published in:Optics express 2020-11, Vol.28 (24), p.36862-36872
Main Authors: Hinsley, Gerard N, Kewish, Cameron M, van Riessen, Grant A
Format: Article
Language:English
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Summary:Dynamic coherent diffractive imaging (CDI) reveals the fine details of structural, chemical, and biological processes occurring at the nanoscale but imposes strict constraints on the object distribution and illumination. Ptychographic CDI relaxes these constraints by exploiting redundant information in data obtained from overlapping regions of an object, but its time resolution is inherently limited. We have extended ptychographic redundancy into the spatiotemporal domain in dynamic CDI, automatically identifying redundant information in time-series coherent diffraction data obtained from dynamic systems. Simulated synchrotron experiments show that high spatiotemporal resolution is achieved without a priori knowledge of the object or its dynamics.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.408530