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Proceedings Paper

Vibration Analysis And Deformation Measurements At High Temperature By TV-Holography
Author(s): Jan T. Malmo; Ole J. Lokberg
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Paper Abstract

TV-holography is used in vibration analysis and surface inspection of very hot objects. Vibrational behavior (resonant frequencies, phase and amplitude of vibrations) has been studied as a function of increasing temperature. To reduce the effect of turbulence we use continuous averaging of TV-frames. Among typical applications of this technique is the testing of turbine components. We also show some examples of deformation measurements for various temperatures up to about 3000°C. The temperature limits are mainly set by the accessible laser illumination to suppress the background radiation. To block the background radiation we use narrow-band interference filters centered at the laser wavelength.

Paper Details

Date Published: 25 April 1990
PDF: 9 pages
Proc. SPIE 1162, Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series, (25 April 1990); doi: 10.1117/12.962753
Show Author Affiliations
Jan T. Malmo, The Foundation for Scientific & Industrial Research (SINTEF) (Norway)
Ole J. Lokberg, Norwegian Institute of Technology (Norway)

Published in SPIE Proceedings Vol. 1162:
Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series
Ryszard J. Pryputniewicz, Editor(s)

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