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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 30 — Oct. 20, 2010
  • pp: 5757–5763

Optimal noise suppression in Fresnel incoherent correlation holography (FINCH) configured for maximum imaging resolution

Barak Katz, Dov Wulich, and Joseph Rosen  »View Author Affiliations

Applied Optics, Vol. 49, Issue 30, pp. 5757-5763 (2010)

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An optimal setup in the sense of imaging resolution for the Fresnel incoherent correlation holography (FINCH) system is proposed and analyzed. Experimental results of the proposed setup in reflection mode suffer from low signal-to-noise ratio (SNR) due to a granular noise. SNR improvement is achieved by two methods that rely on increasing the initial amount of phase-shifted recorded holograms. In the first method, we average over several independent complex-valued digital holograms obtained by recording different sets of three digital phase-shifted holograms. In the second method, the least-squares solution for solving a system of an overdetermined set of linear equations is approximated by utilizing the Moore–Penrose pseudoinverse. These methods improve the resolution of the reconstructed image due to their ability to reveal fine and weak details of the observed object.

© 2010 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(110.4280) Imaging systems : Noise in imaging systems
(090.1995) Holography : Digital holography

ToC Category:

Original Manuscript: July 12, 2010
Manuscript Accepted: September 3, 2010
Published: October 14, 2010

Barak Katz, Dov Wulich, and Joseph Rosen, "Optimal noise suppression in Fresnel incoherent correlation holography (FINCH) configured for maximum imaging resolution," Appl. Opt. 49, 5757-5763 (2010)

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