Reciprocal-space up-sampling from real-space over sampling in x-ray ptychography

被引:62
|
作者
Batey, D. J. [1 ]
Edo, T. B. [1 ]
Rau, C. [2 ]
Wagner, U. [2 ]
Pesic, Z. D. [2 ]
Waigh, T. A. [3 ]
Rodenburg, J. M. [1 ,4 ]
机构
[1] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England
[2] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England
[3] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England
[4] Res Complex Harwell, Didcot OX11 0DE, Oxon, England
来源
PHYSICAL REVIEW A | 2014年 / 89卷 / 04期
基金
英国工程与自然科学研究理事会;
关键词
COMPUTED-TOMOGRAPHY; PHASE RETRIEVAL; SPECIMENS; NANOSCALE;
D O I
10.1103/PhysRevA.89.043812
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We retrieve x-ray phase images from ptychographical data which, according to the conventional coherent diffractive imaging (CDI) criterion, have been grossly undersampled. Ptychographical data are intrinsically oversampled in real space, as the illumination function of subsequent exposures overlap. By exploiting the real- space redundancy in ptychography, we are able to recover the conventional CDI reciprocal sampling, despite an increase in the solid angle of the detector pixels. As a result the current experimental geometrical constraints placed upon probe size, object to detector distance, and pixel size are all relaxed.
引用
收藏
页数:5
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