Two Fringe Evaluation Methods Applied To Thermal Expansion Coefficient Measurements By Speckle-Photography: A Comparison

P. Koulev; P. Aswendt; V. Balavessov; R. Hofling; I. Roussev; V. Grosser

doi:10.1117/12.963840

12 April 1990 Two Fringe Evaluation Methods Applied To Thermal Expansion Coefficient Measurements By Speckle-Photography: A Comparison

P. Koulev, P. Aswendt, V. Balavessov, R. Hofling, I. Roussev, V. Grosser

Author Affiliations +

Proceedings Volume 1183, Holography '89; (1990) https://doi.org/10.1117/12.963840
Event: Holography '89, 1989, Varna, Bulgaria

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.

Citation Download Citation

P. Koulev, P. Aswendt, V. Balavessov, R. Hofling, I. Roussev, and V. Grosser "Two Fringe Evaluation Methods Applied To Thermal Expansion Coefficient Measurements By Speckle-Photography: A Comparison", Proc. SPIE 1183, Holography '89, (12 April 1990); https://doi.org/10.1117/12.963840

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