Predicting visibility of interference fringes in X-ray grating interferometry

被引：16

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

页码：15927 / 15939

页数：13

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