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Reciprocal-space up-sampling from real-space oversampling in x-ray ptychography

DOI: 10.1103/PhysRevA.89.043812 DOI Help

Authors: Darren Batey (University of Sheffield, U.K.) , T. B. Edo (University of Sheffield, U.K.) , Christoph Rau (Diamond Light Source) , Ulrich Wagner (Diamond Light Source) , Zoran Pesic (Diamond Light Source) , Tom Waigh (University of Manchester, U.K.) , John Rodenburg (University of Sheffield, U.K.)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review A , VOL 89 (4)

State: Published (Approved)
Published: April 2014
Diamond Proposal Number(s): 5659

Abstract: We retrieve x-ray phase images from ptychographical data which, according to the conventional coherent diffractive imaging (CDI) criterion, have been grossly undersampled. Ptychographical data are intrinsically oversampled in real space, as the illumination function of subsequent exposures overlap. By exploiting the real-space redundancy in ptychography, we are able to recover the conventional CDI reciprocal sampling, despite an increase in the solid angle of the detector pixels. As a result the current experimental geometrical constraints placed upon probe size, object to detector distance, and pixel size are all relaxed.

Subject Areas: Technique Development

Instruments: I13-1-Coherence

Other Facilities: No

Added On: 16/06/2014 13:19

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