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Proceedings Paper

Thermal strain measurement of joint materials over a small spatial region using statistical interferometry
Author(s): Hirofumi Kadono; Hirofumi Kitajima; Satoru Toyooka
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Paper Abstract

Statistical interferometry is applied to the measurement of thermal strain of object having an interface of two different materials. The technique is based on the statistics of the fully developed speckle field. The complete randomness of the speckle phase can play the role of a standard phase in a statistical sense, and the phase of the object under testing can be derived in a statistical way, in contrast to the conventional interferometry. In this study, the optical system is optimized to measure the thermal strain in a very small region around the interface of joint specimen. Experimental results show that the present method permits the measurement of strain with the accuracy approximately 10-6 with a spatial resolution > 50 micrometers .

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.354986
Show Author Affiliations
Hirofumi Kadono, Saitama Univ. (Japan)
Hirofumi Kitajima, Saitama Univ. (Japan)
Satoru Toyooka, Saitama Univ. (Japan)

Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics
Alexander J. Glass; Joseph W. Goodman; Milton Chang; Arthur H. Guenther; Toshimitsu Asakura, Editor(s)

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