Two-dimensional surface strain measurement based on a variation of Yamaguchi's laser-speckle strain gauge

John P. Barranger

doi:10.1117/12.51127

1 January 1991 Two-dimensional surface strain measurement based on a variation of Yamaguchi's laser-speckle strain gauge

John P. Barranger

Author Affiliations +

Proceedings Volume 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection; (1991) https://doi.org/10.1117/12.51127
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

A novel optical method of measuring 2-D surface strain is proposed. Two linear strains along orthogonal axes and the shear strain between those axes is determined by a variation of Yamaguchi's laser-speckle strain gage technique. It offers the advantages of shorter data acquisition times, less stringent alignment requirements, and reduced decorrelation effects when compared to a previously implemented optical strain rosette technique. The method automatically cancels the translational and rotational components of rigid body motion while simplifying the optical system and improving the speed of response.

Citation Download Citation

John P. Barranger "Two-dimensional surface strain measurement based on a variation of Yamaguchi's laser-speckle strain gauge", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); https://doi.org/10.1117/12.51127

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