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

Etienne Cuche, Pierre Marquet, Christian Depeursinge

Research output: Contribution to journalArticlepeer-review

789 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)4070-4075
Number of pages6
JournalApplied Optics
Volume39
Issue number23
DOIs
StatePublished - Aug 10 2000

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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