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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 6 — Mar. 20, 2006
  • pp: 2117–2122

Real-time monitoring of vibration fringe patterns by optical reconstruction of digital holograms: mode beating detection

Nazif Demoli  »View Author Affiliations

Optics Express, Vol. 14, Issue 6, pp. 2117-2122 (2006)

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A new technique capable of monitoring two-dimensional vibration fringe patterns in real-time is presented. It is based on optical reconstructing of time-averaged digital holograms. Recording of the holograms is realized in a quasi-Fourier off-axis setup whilst reconstructing in an extended Fourier transform setup capable of spatial filtering of the hologram reconstructions. The effectiveness of the proposed device, tested on a silicon wafer, was verified by performing operations such as monitoring of vibration modes, adjusting the hologram recording parameters, or searching for resonant frequencies. Additionally, mode beating between two distant vibration frequencies is observed and reported. The proposed technique is suitable for various scientific and industrial applications.

© 2006 Optical Society of America

OCIS Codes
(090.1760) Holography : Computer holography
(090.2880) Holography : Holographic interferometry

ToC Category:

Original Manuscript: February 9, 2006
Revised Manuscript: March 10, 2006
Manuscript Accepted: March 10, 2006
Published: March 20, 2006

Nazif Demoli, "Real-time monitoring of vibration fringe patterns by optical reconstruction of digital holograms: mode beating detection," Opt. Express 14, 2117-2122 (2006)

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