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Optics Express

Optics Express

  • Editor: C. Martijin de Sterke
  • Vol. 15, Iss. 9 — Apr. 30, 2007
  • pp: 5641–5648

A numerical wave-optical approach for the simulation of analyzer-based x-ray imaging

A. Bravin, V. Mocella, P. Coan, A. Astolfo, and C. Ferrero  »View Author Affiliations


Optics Express, Vol. 15, Issue 9, pp. 5641-5648 (2007)
http://dx.doi.org/10.1364/OE.15.005641


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Abstract

An advanced wave-optical approach for simulating a monochromator-analyzer set-up in Bragg geometry with high accuracy is presented. The polychromaticity of the incident wave on the monochromator is accounted for by using a distribution of incoherent point sources along the surface of the crystal. The resulting diffracted amplitude is modified by the sample and can be well represented by a scalar representation of the optical field where the limitations of the usual ‘weak object’ approximation are removed. The subsequent diffraction mechanism on the analyzer is described by the convolution of the incoming wave with the Green-Riemann function of the analyzer. The free space propagation up to the detector position is well reproduced by a classical Fresnel-Kirchhoff integral. The preliminary results of this innovative approach show an excellent agreement with experimental data.

© 2007 Optical Society of America

OCIS Codes
(080.2720) Geometric optics : Mathematical methods (general)
(110.7440) Imaging systems : X-ray imaging
(340.6720) X-ray optics : Synchrotron radiation
(340.7440) X-ray optics : X-ray imaging

ToC Category:
X-ray Optics

History
Original Manuscript: February 20, 2007
Revised Manuscript: March 26, 2007
Manuscript Accepted: April 1, 2007
Published: April 25, 2007

Citation
A. Bravin, V. Mocella, P. Coan, A. Astolfo, and C. Ferrero, "A numerical wave-optical approach for the simulation of analyzer-based x-ray imaging," Opt. Express 15, 5641-5648 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-9-5641


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