Direct exit-wave reconstruction from a single defocused image

Morgan, A, Martin, A, D'Alfonso, A, Putkunz, C and Allen, L 2011, 'Direct exit-wave reconstruction from a single defocused image', Ultramicroscopy, vol. 111, no. 910, pp. 1455-1460.

Document type: Journal Article
Collection: Journal Articles

Title Direct exit-wave reconstruction from a single defocused image
Author(s) Morgan, A
Martin, A
D'Alfonso, A
Putkunz, C
Allen, L
Year 2011
Journal name Ultramicroscopy
Volume number 111
Issue number 910
Start page 1455
End page 1460
Total pages 6
Publisher Elsevier BV
Abstract We propose a direct, non-iterative method for the exact recovery of the complex wave in the exit-surface plane of a coherently illuminated object from a single defocused image. The method is applicable for a wide range of illumination conditions. The defocus range is subject to certain conditions, which if satisfied allow the complex exit-surface wave to be directly recovered by solving a set of linear equations. These linear equations, whose coefficients depend on the incident illumination, are obtained by analyzing the autocorrelation function of an auxiliary wave which is related to the exit-surface wave in a simple way. This autocorrelation is constructed by taking the inverse Fourier transform of the defocused image. We present an experimental proof of concept by recovering the exit-surface wave of a microfiber illuminated by a plane wave formed using a HeNe laser. © 2011 Elsevier B.V.
Subject Condensed Matter Imaging
Keyword(s) Exit-wave reconstruction
Fresnel coherent diffractive imaging
Single defocused image
DOI - identifier 10.1016/j.ultramic.2011.07.005
Copyright notice © 2011 Elsevier BV
ISSN 0304-3991
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