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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 5 — Mar. 1, 2009
  • pp: 650–652

Optimal signal-to-noise ratios for soft x-ray lensless imaging

R. Rick, A. Scherz, W. F. Schlotter, D. Zhu, J. Lüning, and J. Stöhr  »View Author Affiliations

Optics Letters, Vol. 34, Issue 5, pp. 650-652 (2009)

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We propose and demonstrate a method to gauge and optimize the signal-to-noise ratios (SNRs) in lensless imaging using partially coherent sources. Through spatial filtering we tuned the coherence width of an incoherent soft x-ray undulator source, and we deduce that there exists an optimal spatial filter setting for imaging micrometer-sized objects, while high-resolution imaging is best executed without spatial filtering. Our SNR analysis, given spatial coherence, allows for an estimation of the required exposure time at synchrotron sources and pulse fluence at x-ray laser sources.

© 2009 Optical Society of America

OCIS Codes
(030.4280) Coherence and statistical optics : Noise in imaging systems
(110.4980) Imaging systems : Partial coherence in imaging
(340.7430) X-ray optics : X-ray coded apertures
(260.6048) Physical optics : Soft x-rays

ToC Category:
Coherence and Statistical Optics

Original Manuscript: October 13, 2008
Revised Manuscript: January 13, 2009
Manuscript Accepted: January 13, 2009
Published: February 25, 2009

R. Rick, A. Scherz, W. F. Schlotter, D. Zhu, J. Lüning, and J. Stöhr, "Optimal signal-to-noise ratios for soft x-ray lensless imaging," Opt. Lett. 34, 650-652 (2009)

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