Position correction algorithm combined with Fresnel CDI for ptychography

Zhenjiang Xing; Zijian Xu; Xiangzhi Zhang; Tianxiao Sun; Haigang Liu; Zhi Guo; Yong Wang; Renzhong Tai

doi:10.1117/12.2580183

7 October 2020 Position correction algorithm combined with Fresnel CDI for ptychography

Zhenjiang Xing, Zijian Xu, Xiangzhi Zhang, Tianxiao Sun, Haigang Liu, Zhi Guo, Yong Wang, Renzhong Tai

Proceedings Volume 11571, Optics Frontier Online 2020: Optics Imaging and Display; 115710O (2020) https://doi.org/10.1117/12.2580183
Event: Optics Frontiers Online 2020: Optics Imaging and Display (OFO-1), 2020, Shanghai, China

Abstract

X-ray Ptychography is a high-resolution coherent diffraction imaging method, which has been widely used in the third generation of synchrotron radiation sources. In this method, diffraction images are collected with a series of probe incident positions on an extended sample with partial overlapping between neighbored exposure areas. Accurate location information of the probe is very crucial to obtain high-resolution reconstruction images in experiment. However, the motor movement errors are usually unavoidable, which are caused by thermal drift or mechanical inaccuracy. We proposed an effective method to correct the scanning position errors, which combined the Fresnel CDI algorithm and the image registration method. The feasibility and robustness of the algorithm have been verified by both simulation and xray experiments.

Citation Download Citation

Zhenjiang Xing, Zijian Xu, Xiangzhi Zhang, Tianxiao Sun, Haigang Liu, Zhi Guo, Yong Wang, and Renzhong Tai "Position correction algorithm combined with Fresnel CDI for ptychography", Proc. SPIE 11571, Optics Frontier Online 2020: Optics Imaging and Display, 115710O (7 October 2020); https://doi.org/10.1117/12.2580183

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KEYWORDS

Reconstruction algorithms

Diffraction

Synchrotron radiation

Computer simulations

Charge-coupled devices

Sensors

X-ray imaging

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