CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Influence of central beamstop on ptychographic coherent diffractive imaging
Liu Hai-Gang; Xu Zi-Jian; Zhang Xiang-Zhi; Guo Zhi; Tai Ren-Zhong
2013
Source PublicationACTA PHYSICA SINICA
ISSN1000-3290
Volume62Issue:15
AbstractA beamstop is commonly used in coherent diffractive imaging (CDI) experiments to collect more high-angle diffraction signals. But it causes the low-frequency signals missed, which can make CDI reconstruction unstable or even fail. In this work, a systematic simulation investigation of the effects of the missing low-frequency signals on the quality of reconstructed images of ptychographic CDI (PCDI) is performed using the ptychographic iterative engine algorithm. We found that the robustness of PCDI to the beamstop is much higher than that of the plane-wave CDI, and a smaller incident probe or a larger probe overlap ratio (>= 70%) can further decrease the negative influence of missing low-freqency signals on the reconstruction image. The probe scanning position error will be the main degrading factor of PCDI instead of the beamstop in the higher overlap cases, and needs to be corrected in experiments by using high precision motors or adopting the position refinement algorithms. Our results provide quantitative guidelines for the usage of beamstops in ptychographic CDI experiments.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000323650000015
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13780
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Liu Hai-Gang,Xu Zi-Jian,Zhang Xiang-Zhi,et al. Influence of central beamstop on ptychographic coherent diffractive imaging[J]. ACTA PHYSICA SINICA,2013,62(15).
APA Liu Hai-Gang,Xu Zi-Jian,Zhang Xiang-Zhi,Guo Zhi,&Tai Ren-Zhong.(2013).Influence of central beamstop on ptychographic coherent diffractive imaging.ACTA PHYSICA SINICA,62(15).
MLA Liu Hai-Gang,et al."Influence of central beamstop on ptychographic coherent diffractive imaging".ACTA PHYSICA SINICA 62.15(2013).
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