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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 16 — Jun. 1, 2009
  • pp: 3094–3101

Optics InfoBase > Applied Optics > Volume 48 > Issue 16 > Page 3094

Time-average TV holography for vibration fringe analysis

Upputuri Paul Kumar, Yanam Kalyani, Nandigana Krishna Mohan, and Mahendra Prasad Kothiyal  »View Author Affiliations


Applied Optics, Vol. 48, Issue 16, pp. 3094-3101 (2009)
http://dx.doi.org/10.1364/AO.48.003094


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Abstract

Time-average TV holography is widely used method for vibration measurement. The method generates speckle correlation time-averaged J 0 fringes that can be used for full-field qualitative visualization of mode shapes at resonant frequencies of an object under harmonic excitation. In order to map the amplitudes of vibration, quantitative evaluation of the time-averaged fringe pattern is desired. A quantitative evaluation procedure based on the phase-shifting technique used in two beam interferometry has also been adopted for this application with some modification. The existing procedure requires a large number of frames to be recorded for implementation. We propose a procedure that will reduce the number of frames required for the analysis. The TV holographic system used and the experimental results obtained with it on an edge-clamped, sinusoidally excited square aluminium plate sample are discussed.

© 2009 Optical Society of America

OCIS Codes
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(120.6165) Instrumentation, measurement, and metrology : Speckle interferometry, metrology

ToC Category:
Holographic Interferometry

History
Original Manuscript: February 18, 2009
Revised Manuscript: April 24, 2009
Manuscript Accepted: May 2, 2009
Published: May 27, 2009

Citation
Upputuri Paul Kumar, Yanam Kalyani, Nandigana Krishna Mohan, and Mahendra Prasad Kothiyal, "Time-average TV holography for vibration fringe analysis," Appl. Opt. 48, 3094-3101 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-16-3094

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