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Multiple mode x-ray ptychography using a lens and a fixed diffuser optic

DOI: 10.1088/2040-8978/18/5/054008 DOI Help

Authors: Peng Li (University of Sheffield) , Darren J. Batey (University of Sheffield) , Tega B. Edo (University of Sheffield) , Aaron D. Parsons (Diamond Light Source) , Christoph Rau (Diamond Light Source) , John M. Rodenburg (University of Sheffield)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Optics , VOL 18 (5)

State: Published (Approved)
Published: May 2016

Abstract: We employ a novel combination of a Fresnel lens and a diffuser for x-ray ptychography. The setup uses increased flux by enlarging the width of the coherence-defining slits upstream of the experimental station. In the reconstruction algorithm, modal decomposition is used to account for the resulting partial coherence in the beam. We show that if the object has sparse feactures and large areas of flat contrast, the diffuser facilitates a better reconstruction and the extra diversity in the data also allows cleaner separation of the constituent modes in the illumination. The setup also allows a quick, real-time measure of the beam coherence.

Subject Areas: Physics, Materials

Technical Areas: Optics

Added On: 31/03/2016 11:02

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