An interference technique for the measurement of in-plane displacements of opaque surfaces
- 1 January 1974
- journal article
- research article
- Published by SAGE Publications in Journal of Strain Analysis
- Vol. 9 (1) , 36-43
- https://doi.org/10.1243/03093247v091036
Abstract
A laser interferometer system is used to record two mutually perpendicular diffraction gratings on a photoresist coated specimen. When either grating is re-illuminated by the fringe pattern used to form it, real-time observations can be made of moiré fringes corresponding to surface displacements which occur as a tensile load is applied to the specimen. The technique has been used to study the in-plane deformations of carbon-fibre composites, and typical results are given.Keywords
This publication has 4 references indexed in Scilit:
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- Surface deformation measurement using deformation following hologramsNouvelle Revue d'Optique Appliquée, 1970
- Sensitivity of resist-coated silicon slices to argon-laser wavelengthsElectronics Letters, 1969