Predicting visibility of interference fringes in X-ray grating interferometry

被引：17
|
作者：
Yan, Aimin [1 ]
Wu, Xizeng [1 ]
Liu, Hong [2 ,3 ]
机构：
[1] Univ Alabama Birmingham, Dept Radiol, Birmingham, AL 35249 USA
[2] Univ Oklahoma, Ctr Bioengn, Norman, OK 73019 USA
[3] Univ Oklahoma, Sch Elect & Comp Engn, Norman, OK 73019 USA
来源：
OPTICS EXPRESS | 2016年 / 24卷 / 14期
基金：
美国国家卫生研究院;
关键词：
TALBOT-LAU INTERFEROMETER; PHASE-CONTRAST; FOURIER IMAGES;
D O I：
10.1364/OE.24.015927
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The interference fringe visibility is a common figure of merit in designs of x-ray grating-based interferometers. Presently one has to resort to laborious computer simulations to predict fringe visibility values of interferometers with polychromatic x-ray sources. Expanding the authors' previous work on Fourier expansion of the intensity fringe pattern, in this work the authors developed a general quantitative theory to predict the intensity fringe pattern in closed-form formulas, which incorporates the effects of partial spatial coherence, spectral average and detector pixel re-binning. These formulas can be used to predict the fringe visibility of a Talbot-Lau interferometer with any geometry configuration and any source spectrum. (C) 2016 Optical Society of America
引用
收藏
页码：15927 / 15939
页数：13
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