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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 5 — Feb. 10, 2014
  • pp: 931–936

Vibration detection by observation of speckle patterns

Silvio Bianchi  »View Author Affiliations


Applied Optics, Vol. 53, Issue 5, pp. 931-936 (2014)
http://dx.doi.org/10.1364/AO.53.000931


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Abstract

When laser light illuminates a rough surface it is scattered into a speckle pattern that is strongly dependent on the surface geometry. Here, we show that it is possible to sense surface vibrations by measuring signal variations from a single pixel detector that collects a small portion of the scattered light. By carefully tuning the probing laser beam size and the detector’s aperture it was possible to record a good quality signal in the acoustic band. This approach eliminates the need for an interferometer and thus opens the door to the possibility of detecting vibrations at distances of few hundreds of meters.

© 2014 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: November 12, 2013
Revised Manuscript: January 12, 2014
Manuscript Accepted: January 13, 2014
Published: February 6, 2014

Citation
Silvio Bianchi, "Vibration detection by observation of speckle patterns," Appl. Opt. 53, 931-936 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-5-931

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