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Proceedings Paper

Two Fringe Evaluation Methods Applied To Thermal Expansion Coefficient Measurements By Speckle-Photography: A Comparison
Author(s): P. Koulev; P. Aswendt; V. Balavessov; R. Hofling; I. Roussev; V. Grosser
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Paper Abstract

Two fully automated and essentially different methods for Young's fringes analysis are applied to thermal expansion coefficient determination of engineering ceramics by double-exposure speckle-photography. The first one creates fringe structures and fits them to the experimental images. The cross-correlation functions between the given image and the generated fringe structure are calculated and serve as a measure of coincidence. In order to reduce the computational demands,the second method analyses the fringe intensity profile along four selected directions.

Paper Details

Date Published: 12 April 1990
PDF: 7 pages
Proc. SPIE 1183, Holography '89, (12 April 1990); doi: 10.1117/12.963840
Show Author Affiliations
P. Koulev, Bulgarian Academy of Sciences (Bulgaria)
P. Aswendt, Academy of Sciences of G D R (Germany)
V. Balavessov, Bulgarian Academy of Sciences (Bulgaria)
R. Hofling, Academy of Sciences of G D R (Germany)
I. Roussev, Bulgarian Academy of Sciences (Bulgaria)
V. Grosser, Academy of Sciences of G D R (Germany)


Published in SPIE Proceedings Vol. 1183:
Holography '89
Yuri N. Denisyuk; Tung H. Jeong, Editor(s)

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