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Phase retrieval through a one dimensional ptychographic engine

DOI: 10.1364/OE.22.017281 DOI Help
PMID: 25090542 PMID Help

Authors: Fabio Vittoria (University College London) , Paul Claude Diemoz (University College London) , Marco Endrizzi (University College London) , Liberato De Caro (Istituto di Cristallografia (IC-CNR), v. Amendola) , Ulrich Wagner (Diamond Light Source) , Christoph Rau (Diamond Light Source) , Ian Robinson (Research Complex at Harwell) , Alessandro Olivo (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Optics Express , VOL 22 (14) , PAGES 17281-17291

State: Published (Approved)
Published: July 2014
Diamond Proposal Number(s): 9586

Abstract: Ptychographic techniques are currently the subject of increasing scientific interest due to their capability to retrieve the complex transmission function of an object at very high resolution. However, they impose a substantial burden in terms of acquisition time and dimension of the scanned area, which limits the range of samples that can be studied. We have developed a new method that combines the ptychographic approach in one direction with Fresnel propagation in the other by employing a strongly asymmetric probe. This enables scanning the sample in one direction only, substantially reducing exposure times while covering a large field of view. This approach sacrifices ptychographic–related resolution in one direction, but removes any limitation on the probe dimension in the direction orthogonal to the scanning, enabling the scan of relatively large objects without compromising exposure times.

Subject Areas: Physics, Technique Development

Instruments: I13-1-Coherence

Added On: 10/07/2014 13:21

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