Drift correction in ptychographic diffractive imaging

作者：Beckers Mike; Senkbeil Tobias; Gorniak Thomas; Giewekemeyer Klaus; Salditt Tim; Rosenhahn Axel^*

来源：Ultramicroscopy, 2013, 126: 44-47.

DOI：10.1016/j.ultramic.2012.11.006

• X-Ray microscopy
• Ptychography
• Drift correction

X-ray ptychography is a rapidly developing phase retrieval technique that combines the experimental advantages of coherent diffractive imaging with the possibility to image extended specimens. Data collection requires imaging at several scan points with high positional accuracy, which implies susceptibility to mechanical drift. This is a well-known problem in ptychographic scans, which can reduce reconstruction quality and limit the achievable resolution. Using a simple model for positional drift, we show that a set of corrected positions can be found systematically, leading to strong improvements in the reconstruction of a Siemens star dataset severely affected by drift.

• 出版日期2013-3