Abstract
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.
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