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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 23 — Aug. 10, 2000
  • pp: 4070–4075

Spatial filtering for zero-order and twin-image elimination in digital off-axis holography

Etienne Cuche, Pierre Marquet, and Christian Depeursinge  »View Author Affiliations


Applied Optics, Vol. 39, Issue 23, pp. 4070-4075 (2000)
http://dx.doi.org/10.1364/AO.39.004070


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Abstract

Off-axis holograms recorded with a CCD camera are numerically reconstructed with a calculation of scalar diffraction in the Fresnel approximation. We show that the zero order of diffraction and the twin image can be digitally eliminated by means of filtering their associated spatial frequencies in the computed Fourier transform of the hologram. We show that this operation enhances the contrast of the reconstructed images and reduces the noise produced by parasitic reflections reaching the hologram plane with an incidence angle other than that of the object wave.

© 2000 Optical Society of America

OCIS Codes
(040.1520) Detectors : CCD, charge-coupled device
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(100.2000) Image processing : Digital image processing

History
Original Manuscript: January 18, 2000
Revised Manuscript: May 22, 2000
Published: August 10, 2000

Citation
Etienne Cuche, Pierre Marquet, and Christian Depeursinge, "Spatial filtering for zero-order and twin-image elimination in digital off-axis holography," Appl. Opt. 39, 4070-4075 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-23-4070

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