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Proceedings Paper

Range of measurement of computer-aided speckle interferometry
Author(s): Duan-Jun Chen; Shen Li; T. Y. Hsu; Fu-Pen Chiang
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Paper 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.

Paper Details

Date Published: 1 December 1991
Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); doi: 10.1117/12.49543
Show Author Affiliations
Duan-Jun Chen, SUNY/Stony Brook (United States)
Shen Li, SUNY/Stony Brook (United States)
T. Y. Hsu, SUNY/Stony Brook (United States)
Fu-Pen Chiang, SUNY/Stony Brook (United States)

Published in SPIE Proceedings Vol. 1554:
Second International Conference on Photomechanics and Speckle Metrology
Fu-Pen Chiang; Fu-Pen Chiang, Editor(s)

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