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.
Two-dimensional x-ray beam phase sensing / S. Bérujon, E. Ziegler, R. Cerbino, L. Peverini. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 108:15(2012 Apr 11), pp. 158102.1-158102.5.
Two-dimensional x-ray beam phase sensing
R. CerbinoPenultimo
;
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.File | Dimensione | Formato | |
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026_Berujon_PRL_2012_suppl.pdf
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