Range of measurement of computer-aided speckle interferometry

Duan-Jun Chen; Shen Li; T. Y. Hsu; Fu-Pen Chiang

doi:10.1117/12.49543

1 December 1991 Range of measurement of computer-aided speckle interferometry

Duan-Jun Chen, Shen Li, T. Y. Hsu, Fu-Pen Chiang

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49543
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Measurable area, accuracy, and ranges of displacement, strain and rotation of the CASI are estimated. The measurable area for a given video camera is proportional to the area of each individual speckle. The displacement uncertainty is proportional to speckle size. The measurable displacement ranges from a few percent of speckle size to several centimeters. Strain and rotation up to 3 ~ 5% can be detected. Experimental results from CASI on crack opening displacement (COD) and normal strain distribution ahead of a crack tip of an aluminum specimen under mode I loading are presented.

Citation Download Citation

Duan-Jun Chen, Shen Li, T. Y. Hsu, and Fu-Pen Chiang "Range of measurement of computer-aided speckle interferometry", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49543

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