Performance and optimization of X-ray grating interferometry | Zendy

Thomas Thuering | Zendy; Marco Stampai | Zendy

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Performance and optimization of X-ray grating interferometry

Author(s) -

Thomas Thuering,

Marco Stampai

Publication year - 2014

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2013.0027

Subject(s) - optics , interferometry , grating , visibility , astronomical interferometer , monochromatic color , interference (communication) , physics , interferometric visibility , talbot effect , metric (unit) , refraction , computer science , computer network , channel (broadcasting) , operations management , economics

The monochromatic and polychromatic performance of a grating interferometer is theoretically analysed. The smallest detectable refraction angle is used as a metric for the efficiency in acquiring a differential phase-contrast image. Analytical formulae for the visibility and the smallest detectable refraction angle are derived for Talbot-type and Talbot–Lau-type interferometers, respectively, providing a framework for the optimization of the geometry. The polychromatic performance of a grating interferometer is investigated analytically by calculating the energy-dependent interference fringe visibility, the spectral acceptance and the polychromatic interference fringe visibility. The optimization of grating interferometry is a crucial step for the design of application-specific systems with maximum performance.

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