Two-dimensional x-ray beam phase sensing - PubMed (original) (raw)

Two-dimensional x-ray beam phase sensing

Sébastien Bérujon et al. Phys Rev Lett. 2012.

Abstract

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.

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