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Coherent diffraction imaging using laboratory light sources

Coherent diffraction imaging using laboratory light sources
Coherent diffraction imaging using laboratory light sources
Coherent diffractive imaging, also called lenses imaging methods, are now a standard tool for Xray imaging on synchrotron devices [1,2,3]. The diffractive imaging methods can avoid limitations of imperfect optics in the Xray region and also limit the dose exposed to the sample. Therefore, these methods allow to reach higher resolution compared to the standard lens based methods. Moreover, lensless methods allow to extract full information about the wavefront behind the sample and hence relative phase and amplitude can be recovered. Finally, advanced lensless methods such as ptychography allow to extract information about the illumination that can be used for beam metrology purposes [3]. In recent years, the coherent diffractive imaging is getting to be used also with the laboratory sources and longer wavelengths such as EUV and visible light region. Limitation of the laboratory EUV sources is lower signal, worse coherence properties and generally lower time stability of the signal. The requirements for lateral and temporal coherence can be slightly relaxed if the reconstruction is sufficiently overconstrained [4,5,6]. In this work, we will introduce and compare numerical methods that can significantly help to improve convergence and reconstruction quality. We will introduce the methods using numerical examples and also real measured data from EUV and IR light experiments. We will use ptychography method for the reconstruction, although most of the proposed methods can be used also with other lensless imaging techniques.
Odstrčil, M.
b297d3ec-ed42-4709-9f90-7af79d0644c7
Baksh, P.
578fea83-9a1c-4dd0-b3f6-66f5552f2344
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Odstrčil, M.
b297d3ec-ed42-4709-9f90-7af79d0644c7
Baksh, P.
578fea83-9a1c-4dd0-b3f6-66f5552f2344
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67

Odstrčil, M., Baksh, P. and Brocklesby, W.S. (2014) Coherent diffraction imaging using laboratory light sources. EXTATIC Welcome Week Workshop, Warsaw, Poland. 25 - 29 Jun 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

Coherent diffractive imaging, also called lenses imaging methods, are now a standard tool for Xray imaging on synchrotron devices [1,2,3]. The diffractive imaging methods can avoid limitations of imperfect optics in the Xray region and also limit the dose exposed to the sample. Therefore, these methods allow to reach higher resolution compared to the standard lens based methods. Moreover, lensless methods allow to extract full information about the wavefront behind the sample and hence relative phase and amplitude can be recovered. Finally, advanced lensless methods such as ptychography allow to extract information about the illumination that can be used for beam metrology purposes [3]. In recent years, the coherent diffractive imaging is getting to be used also with the laboratory sources and longer wavelengths such as EUV and visible light region. Limitation of the laboratory EUV sources is lower signal, worse coherence properties and generally lower time stability of the signal. The requirements for lateral and temporal coherence can be slightly relaxed if the reconstruction is sufficiently overconstrained [4,5,6]. In this work, we will introduce and compare numerical methods that can significantly help to improve convergence and reconstruction quality. We will introduce the methods using numerical examples and also real measured data from EUV and IR light experiments. We will use ptychography method for the reconstruction, although most of the proposed methods can be used also with other lensless imaging techniques.

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More information

Published date: 2014
Venue - Dates: EXTATIC Welcome Week Workshop, Warsaw, Poland, 2014-06-25 - 2014-06-29
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 388045
URI: http://eprints.soton.ac.uk/id/eprint/388045
PURE UUID: ac9f828a-1eea-40f5-acdd-691d859b80d7
ORCID for W.S. Brocklesby: ORCID iD orcid.org/0000-0002-2123-6712

Catalogue record

Date deposited: 25 Feb 2016 09:57
Last modified: 15 Jul 2020 00:24

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Contributors

Author: M. Odstrčil
Author: P. Baksh
Author: W.S. Brocklesby ORCID iD

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