Influence of finite spatial coherence on ptychographic reconstruction

X-ray ptychography is an ultrahigh-resolution scanning coherent diffractive imaging technique, allowing quantitative measurements of extended samples and a simultaneous reconstruction of the illuminating wavefront. Recent development of the mixed-state reconstruction algorithm has triggered a certai...

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Bibliographic Details
Published in:Applied physics letters 2015-07, Vol.107 (1)
Main Authors: Stachnik, K., Mohacsi, I., Vartiainen, I., Stuebe, N., Meyer, J., Warmer, M., David, C., Meents, A.
Format: Article
Language:English
Subjects:
ALGORITHMS
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Coherence
ILLUMINANCE
Image reconstruction
MIXED STATE
MIXED STATES
SPATIAL RESOLUTION
X RADIATION
X ray sources
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Summary:X-ray ptychography is an ultrahigh-resolution scanning coherent diffractive imaging technique, allowing quantitative measurements of extended samples and a simultaneous reconstruction of the illuminating wavefront. Recent development of the mixed-state reconstruction algorithm has triggered a certain interest in utilizing partially coherent X-ray sources for ptychography. Here, we study how finite spatial coherence influences the reconstructed image of a test structure. Our work shows that use of a highly coherent illumination provides images with better spatial resolution and fewer artefacts than the approach with partial coherence.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4926328