Adaptive-window angular spectrum algorithm for near-field ptychography | |
Pan, An1,2; Zhou, Meiling1,2; Zhang, Yan1,2; Min, Junwei1; Lei, Ming1; Yao, Baoli1 | |
刊名 | Optics Communications |
2019 | |
卷号 | 430页码:73-82 |
关键词 | Fourier Optics And Signal Processing Phase Retrieval Diffraction Computational Imaging Ptychography |
ISSN号 | 00304018 |
DOI | 10.1016/j.optcom.2018.08.035 |
产权排序 | 1 |
英文摘要 | 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 |
语种 | 英语 |
出版者 | Elsevier B.V. |
WOS记录号 | WOS:000446073900010 |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/30577] |
专题 | 西安光学精密机械研究所_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 |
推荐引用方式 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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