Work

Broadband ptychography using curved wavefront illumination

Year: 2023

Type: article

Abstract: We examine the interplay between spectral bandwidth and illumination curvature in ptychography. By tailoring the divergence of the illumination, broader spectral bandwidths can be tolerated without requiring algorithmic modifications to the forward model. In particular, a strong wavefront curvature transitions a far-field diffraction geometry to an effectively near-field one, which is less affected by temporal coherence effects. The relaxed temporal coherence requirements allow for leveraging wider spectral bandwidths and larger illumination spots. Our findings open up new avenues towards utilizing pink and broadband beams for increased flux and throughput at both synchrotron facilities and lab-scale beamlines.

Source: Optics Express

DOI: 10.1364/oe.495197

Authors: Daniel S. Penagos Molina, Lars Loetgering, Wilhelm Eschen, Jens Limpert, Jan Rothhardt

Institutions: Helmholtz Institute Jena, GSI Helmholtz Centre for Heavy Ion Research, Fraunhofer Institute for Applied Optics and Precision Engineering

Language: English

Topic: Advanced X-ray Imaging Techniques

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,258