Experimental Mechanics

, Volume 13, Issue 8, pp 339–344 | Cite as

Vibration analysis of plates by real-time stroboscopic holography

The authors discuss the versatility of real-time vs. time-averaged holography for vibration analysis
  • C. R. Hazell
  • S. D. Liem


The application of time-averaged holography to the analysis of vibrating surfaces is now a widespread and very powerful experimental technique. However, the realtime method of exactly superimposing the reconstructed static image on the vibrating object and observing the resulting fringe patterns under stroboscopic illumination is becoming more common. In fact, by introducing an initial family of interference fringes by the rotation of the object (or image) before vibration begins, the advantages of both methods are combined.

List of Symbols


amplitude of vibration


intensity distribution of reconstructed image of static object


intensity ofIo modulated by fringe function


zero-order Bessel function


fringe order


wavelength of light


zeroes ofJo

θ> 1

angle between direction of object illumination and direction of vibration


angle between direction of object viewing and direction of vibration


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Copyright information

© Society for Experimental Mechanics, Inc. 1973

Authors and Affiliations

  • C. R. Hazell
    • 1
  • S. D. Liem
    • 1
  1. 1.Department of Mechanical EngineeringThe University of British ColumbidVancouver 8Canada

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