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Proceedings Paper

X-ray optics and imaging with hard coherent synchrotron radiation
Author(s): Jose Baruchel; Jean-Yves Buffiere; Peter Cloetens; Jean-Pierre Guigay; Lucia Mancini; Gilles Peix; Francoise Peyrin; Murielle Pateyron-Salome; Michel Schlenker; Per O. Spanne
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Paper Abstract

Results obtained on the ID19 beamline at ESRF, where particularly high coherence is associated with the long source-to-sample distance and the small size of the x-ray source, illustrate the possibilities of imaging using coherence. These features make the imaging of phase objects extremely simple, since a 'propagation' technique, similar to the defocusing mode of electron microscopy and to in-line Gabor holography in optics, can be used. The physical principle involved is Fresnel diffraction. We used this 'propagation' technique both to measure, via the figures obtained from a fiber and a periodic grating, the source size, and to image objects with negligible absorption for hard x-rays but appreciable variations in optical path length. Examples of the latter ar two or three-dimensional images of light natural or artificial materials. The 3D reconstruction can be performed either with a filtered back- projection algorithm designed for attenuation tomography, which was shown to be a good approximation in some cases, or with a phase reconstruction procedure similar to that used for electron microscopy. The spurious images associated with beam line components, and the conditions for coherence preservation are also briefly discussed.

Paper Details

Date Published: 1 November 1997
PDF: 12 pages
Proc. SPIE 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications, (1 November 1997); doi: 10.1117/12.293370
Show Author Affiliations
Jose Baruchel, European Synchrotron Radiation Facility (France)
Jean-Yves Buffiere, LGPPM-INSA (France)
Peter Cloetens, European Synchrotron Radiation Facility (France) and Univ. of Antwerp (Belgium)
Jean-Pierre Guigay, European Synchrotron Radiation Facility and CNRS/Lab. Louis Neel (France)
Lucia Mancini, European Synchrotron Radiation Facility (France)
Gilles Peix, CNDRI INSA (France)
Francoise Peyrin, CNDRI INSA (France) and European Synchrotron Radiation Facility (France)
Murielle Pateyron-Salome, CNDRI INSA (France), European Synchrotron Radiation Facility (France), and CREATIS INSA (France)
Michel Schlenker, CNRS Lab. Louis Neel (France)
Per O. Spanne, European Synchrotron Radiation Facility (France)


Published in SPIE Proceedings Vol. 3154:
Coherent Electron-Beam X-Ray Sources: Techniques and Applications
Andreas K. Freund; Henry P. Freund; Malcolm R. Howells, Editor(s)

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