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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 30 — Oct. 20, 2009
  • pp: 5853–5862

Windowed defocused photographic speckle vibration measurement

Jose Diazdelacruz  »View Author Affiliations

Applied Optics, Vol. 48, Issue 30, pp. 5853-5862 (2009)

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The out-of-plane vibration of a rough surface causes an in-plane vibration of its speckle pattern when observed with a defocused optical photographic system. If the frequency of the oscillations is high enough, a time-averaged specklegram is recorded from which the amplitude of the vibration can be estimated. The statistical character of speckle distributions along with the pixel sampling and intensity analog-to-digital conversion inherent to electronic cameras degrade the accuracy of the amplitude measurement to an extent that is analyzed and experimentally tested in this paper. The relations limiting the mutually competing metrological features of a defocused speckle system are also deduced mathematically.

© 2009 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: July 30, 2009
Revised Manuscript: September 24, 2009
Manuscript Accepted: September 30, 2009
Published: October 19, 2009

Jose Diazdelacruz, "Windowed defocused photographic speckle vibration measurement," Appl. Opt. 48, 5853-5862 (2009)

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