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2 January 2018 Partial coherence and the influence of overlap and curvature in ptychography
Guido Cadenazzi, Bo Chen, Timur Gureyev, H. M. Quiney, K. A. Nugent, B. Abbey
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Proceedings Volume 10456, Nanophotonics Australasia 2017; 104565X (2018) https://doi.org/10.1117/12.2283395
Event: SPIE Nanophotonics Australasia, 2017, Melbourne, Australia
Abstract
In this paper, we use optical coherence theory to define the limit for the spatial coherence length with respect to the degree of overlap between adjacent probe positions in ptychography. The influence of the degree of curvature of the probe in relation to partial coherence in the Fresnel geometry for a fixed overlap is also considered. This work has implications for the application of ptychographic coherent imaging using partially coherent sources. We validate these results through a simulation study of coherence versus overlap parameter and curvature.
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Guido Cadenazzi, Bo Chen, Timur Gureyev, H. M. Quiney, K. A. Nugent, and B. Abbey "Partial coherence and the influence of overlap and curvature in ptychography", Proc. SPIE 10456, Nanophotonics Australasia 2017, 104565X (2 January 2018); https://doi.org/10.1117/12.2283395
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KEYWORDS
Coherence (optics)
Diffraction
Reconstruction algorithms
Spatial coherence
Coherence imaging
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