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Adaptive-window angular spectrum algorithm for near-field ptychography
Pan, An1,2; Zhou, Meiling1,2; Zhang, Yan1,2; Min, Junwei1; Lei, Ming1; Yao, Baoli1
作者部门瞬态光学技术国家重点实验室
2019
发表期刊Optics Communications
ISSN00304018
卷号430页码:73-82
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摘要

Near-field ptychography provides advantages over far-field ptychography that large field-of-view (FOV) can be imaged with fewer diffraction images, and with weaker requirements on the detector dynamic range and beam coherence, which has drawn attention recently. However, the propagation distance of traditional angular spectrum (AS) method is limited and the reconstruction of the smallest resolvable object detail is restricted by the sensor's pixel size. To this end, we propose an adaptive-window angular spectrum (AWAS) algorithm to solve both problems by adding the window adaptively associated with the propagation distance and avoid the extra computations via extra scaling factors. Meanwhile, it features validity for the independent sample size and the sample number on the observation plane. This algorithm is strictly deduced from the Rayleigh–Sommerfeld formula and based on the linear convolution, which can be evaluated by fast Fourier transform effectively. The burden of calculations is comparable to traditional AS method. The performance has been achieved both in two-dimensional and three-dimensional near-field ptychography with simulations and experiments. This method will make near-field ptychography more practical and can be used in X-ray or electron-microscopy and other computational imaging techniques. © 2018

关键词Fourier Optics And Signal Processing Phase Retrieval Diffraction Computational Imaging Ptychography
DOI10.1016/j.optcom.2018.08.035
收录类别SCI ; EI
语种英语
WOS记录号WOS:000446073900010
出版者Elsevier B.V.
EI入藏号20183405732339
引用统计
文献类型期刊论文
条目标识符http://ir.opt.ac.cn/handle/181661/30577
专题瞬态光学技术国家重点实验室
通讯作者Yao, Baoli
作者单位1.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China
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GB/T 7714
Pan, An,Zhou, Meiling,Zhang, Yan,et al. Adaptive-window angular spectrum algorithm for near-field ptychography[J]. Optics Communications,2019,430:73-82.
APA Pan, An,Zhou, Meiling,Zhang, Yan,Min, Junwei,Lei, Ming,&Yao, Baoli.(2019).Adaptive-window angular spectrum algorithm for near-field ptychography.Optics Communications,430,73-82.
MLA Pan, An,et al."Adaptive-window angular spectrum algorithm for near-field ptychography".Optics Communications 430(2019):73-82.
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