Two-dimensional x-ray beam phase sensing

We present a new method to analyze quantitatively the wave front of a partially coherent x-ray beam. The technique is based on the use of two-dimensional speckle patterns combined with digital image correlation algorithms and offers a pixel size resolution, a high accuracy, and a reduced sensitivity...

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Bibliographic Details
Published in:Physical review letters 2012-04, Vol.108 (15), p.158102-158102, Article 158102
Main Authors: Bérujon, Sébastien, Ziegler, Eric, Cerbino, Roberto, Peverini, Luca
Format: Article
Language:English
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Summary:We present a new method to analyze quantitatively the wave front of a partially coherent x-ray beam. The technique is based on the use of two-dimensional speckle patterns combined with digital image correlation algorithms and offers a pixel size resolution, a high accuracy, and a reduced sensitivity to mechanical vibrations thanks to a very simple setup. The requirements on transverse and longitudinal coherence are also low. Finally, we show how the method can be used for phase contrast imaging applications by a single sample exposure process.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.108.158102