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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 18 — Aug. 30, 2010
  • pp: 18922–18931

Wavefield back-propagation in high-resolution X-ray holography with a movable field of view

Erik Guehrs, Christian M. Güunther, Bastian Pfau, Torbjörn Rander, Stefan Schaffert, William F. Schlotter, and Stefan Eisebitt  »View Author Affiliations


Optics Express, Vol. 18, Issue 18, pp. 18922-18931 (2010)
http://dx.doi.org/10.1364/OE.18.018922


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Abstract

Mask-based Fourier transform holography is used to record images of biological objects with 2.2 nm X-ray wavelength. The holography mask and the object are decoupled from each other which allows us to move the field of view over a large area over the sample. Due to the separation of the mask and the sample on different X-ray windows, a gap between both windows in the micrometer range typically exists. Using standard Fourier transform holography, focussed images of the sample can directly be reconstructed only for gap distances within the setup’s depth of field. Here, we image diatoms as function of the gap distance and demonstrate the possibility to recover focussed images via a wavefield back-propagation technique. The limitations of our approach with respect to large separations are mainly associated with deviations from flat-field illumination of the object.

© 2010 Optical Society of America

OCIS Codes
(340.7440) X-ray optics : X-ray imaging
(090.1995) Holography : Digital holography
(070.7345) Fourier optics and signal processing : Wave propagation

ToC Category:
X-ray Optics

History
Original Manuscript: May 20, 2010
Revised Manuscript: July 22, 2010
Manuscript Accepted: July 24, 2010
Published: August 20, 2010

Virtual Issues
Vol. 5, Iss. 13 Virtual Journal for Biomedical Optics
September 7, 2010 Spotlight on Optics

Citation
Erik Guehrs, Christian M. Günther, Bastian Pfau, Torbjörn Rander, Stefan Schaffert, William F. Schlotter, and Stefan Eisebitt, "Wavefield back-propagation in high-resolution X-ray holography with a movable field of view," Opt. Express 18, 18922-18931 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-18-18922


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