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Proceedings Paper

Deformation Measurements At Very High Temperatures By ESPI And Moire Methods
Author(s): Ole J. Lokberg; Jan T. Malmo
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Paper Abstract

We describe two optical methods which have been used to measure the deformation and general behaviour of objects heated to high temperatures. TV-holography or ESPI has proven capable to follow and measure the surface behaviour and deformation with interferometric sensitivity to temperatures about +1600 °C, where the temperature limit is mainly determined by practical experimental problems and is not of fundamental character. Some preliminary results will be presented. The Moire method can be used to measure in-plane object movements to temperatures so far up to about +1300 °C by recording the variation in emissivity of an inscribed surface grating without external illumination.

Paper Details

Date Published: 25 November 1986
PDF: 7 pages
Proc. SPIE 0661, Optical Testing and Metrology, (25 November 1986); doi: 10.1117/12.938593
Show Author Affiliations
Ole J. Lokberg, The Norwegian Institute of Technology (Norway)
Jan T. Malmo, Foundation of Scientific & Industrial Research (Norway)

Published in SPIE Proceedings Vol. 0661:
Optical Testing and Metrology
Chander Prakash Grover, Editor(s)

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