Open AccessQuantitative theory of X-ray interferometers based on dual phase grating: fringe period and visibility
Author(s) -
Aimin Yan,
Xizeng Wu,
Hong Liu
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.023142
Subject(s) - grating , optics , astronomical interferometer , interferometry , interference (communication) , visibility , phase (matter) , physics , blazed grating , diffraction grating , interferometric visibility , dual (grammatical number) , phase contrast imaging , computer science , telecommunications , channel (broadcasting) , quantum mechanics , phase contrast microscopy , art , literature
In most of grating x-ray interferometry one needs an absorbing grating as the analyzer to measure high-resolution interference fringes. Dual phase grating interferometry is a technique to get rid of the absorbing grating for radiation dose reduction. The authors present a quantitative theory of dual grating x-ray interferometry. The theory elucidates the fringe formation mechanism. The derived formulas of fringe period and fringe visibility provide useful tools for design optimization of dual phase grating interferometers.