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Proceedings Paper

Speckle Photography For Strain Measurement - A Critical Assessment
Author(s): E. Archbold; A. E. Ennos; M. S. Virdee
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Paper Abstract

Speckle photography is a simple technique for measuring displacement in the plane of a surface, so allowing the strain field to be evaluated in two dimensions. A direct experimental comparison of speckle photography with photoelasticity and with finite element analysis on a notched tensile test specimen showed that serious errors could, however, occur due to local surface tilting and to aberrations of the imaging lens. Methods of minimising these effects and those of the speckle decorrelation that can also take place, are discussed.

Paper Details

Date Published: 18 April 1978
PDF: 8 pages
Proc. SPIE 0136, 1st European Conf on Optics Applied to Metrology, (18 April 1978); doi: 10.1117/12.956169
Show Author Affiliations
E. Archbold, National Physical Laboratory (United Kingdom)
A. E. Ennos, National Physical Laboratory (United Kingdom)
M. S. Virdee, National Physical Laboratory (United Kingdom)

Published in SPIE Proceedings Vol. 0136:
1st European Conf on Optics Applied to Metrology
Michel H. Grosmann; Patrick Meyrueis, Editor(s)

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