X-ray optics and imaging with hard coherent synchrotron radiation

Jose Baruchel; Jean-Yves Buffiere; Peter Cloetens; Jean-Pierre Guigay; Lucia Mancini; Gilles Peix; Francoise Peyrin; Murielle Pateyron-Salome; Michel Schlenker; Per O. Spanne

doi:10.1117/12.293370

1 November 1997 X-ray optics and imaging with hard coherent synchrotron radiation

Jose Baruchel, Jean-Yves Buffiere, Peter Cloetens, Jean-Pierre Guigay, Lucia Mancini, Gilles Peix, Francoise Peyrin, Murielle Pateyron-Salome, Michel Schlenker, Per O. Spanne

Author Affiliations +

Proceedings Volume 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications; (1997) https://doi.org/10.1117/12.293370
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

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Jose Baruchel, Jean-Yves Buffiere, Peter Cloetens, Jean-Pierre Guigay, Lucia Mancini, Gilles Peix, Francoise Peyrin, Murielle Pateyron-Salome, Michel Schlenker, and Per O. Spanne "X-ray optics and imaging with hard coherent synchrotron radiation", Proc. SPIE 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications, (1 November 1997); https://doi.org/10.1117/12.293370

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