[39] Burdet, G. R. Morrison, X. Huang, X. Shi, J. N. Clark, F. Zhang, M. Civita, R. Harder, and I. K. Robinson, “Observations of artefacts in the x-ray ptychography method”, Optics Express 22, 10294-10303 (2014).【原文】
ABSTRACT
X-ray ptychography, a scanning coherent diffraction imaging method, was
used to reconstruct images of a ”Siemens star” test pattern with amplitude
and phase contrast. While studying how the use of illumination with an
increased bandwidth results in clear improvements in the quality of image
reconstructions, we found that an artificial change in the overall distance
scale factor of the algorithm leads to a systematic response in the image,
which is reproduced with an incorrect number of spokes. This pathology is
explained by the conflict between the length scales set by the scan and by
the diffraction patterns on the detector.
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