Experimental Mechanics

, Volume 12, Issue 10, pp 454–460 | Cite as

Full-field surface-strain and displacement analysis of three-dimensional objects by speckle interferometry

Method presented by the authors depends on the speckle effect which is produced when coherent light impinges on diffuse surfaces
  • Y. Y. Hung
  • J. D. Hovanesian


A method of full-field measurement of displacements as well as strain on arbitrarily curved surfaces is introduced. The speckle effect of coherent light is utilized to produce fringes due to displacements. Unlike the fringes produced by holographic interferometry, these fringes have a unique interpretation in relating to displacements and they localize on the surface.

Three measurements are required to determine the three components of displacement; and, knowing the geometry of the object, its surface strains can be deduced.

Three ways of recording displacement fringes, namely, real time, double exposure and superposition, are described.


Mechanical Engineer Fluid Dynamics Curve Surface Displacement Analysis Surface Strain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Society for Experimental Mechanics, Inc. 1972

Authors and Affiliations

  • Y. Y. Hung
    • 1
  • J. D. Hovanesian
    • 2
  1. 1.Dept. of Theoretical and Applied MechanicsUniversity of IllinoisUrbana
  2. 2.Oakland UniversityRochester

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