Journal
OPTICS EXPRESS
Volume 21, Issue 11, Pages 13592-13606Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.013592
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Funding
- EPSRC basic technology [EP/E034055/1]
- EPSRC [EP/I022562/1]
- Phase Modulation Technology for X-ray Imaging
- US National Science Foundation [DMR-9724294]
- US Department of Energy, Office of Basic Energy Sciences [DE-AC0206CH11357]
- Australian Research Council Centre of Excellence for Coherent X-ray Science
- European Community's Seventh Framework Programme [226716]
- EPSRC [EP/E034055/1, EP/I022562/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I022562/1, EP/E034055/1] Funding Source: researchfish
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Accurate knowledge of translation positions is essential in ptychography to achieve a good image quality and the diffraction limited resolution. We propose a method to retrieve and correct position errors during the image reconstruction iterations. Sub-pixel position accuracy after refinement is shown to be achievable within several tens of iterations. Simulation and experimental results for both optical and X-ray wavelengths are given. The method improves both the quality of the retrieved object image and relaxes the position accuracy requirement while acquiring the diffraction patterns. (C) 2013 Optical Society of America
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