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Proceedings Paper

An optical method for measuring metal surface temperature in harsh environment conditions
Author(s): Chayan Mitra; Ayan Banerjee; Sandip Maity; Norman Turnquist
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Paper Abstract

Commercially available instruments for measuring and monitoring surface temperature of metal parts are very limited and often unsuitable for applications at harsh environment conditions. Another major challenge is to measure temperature of a rotating surface, as it is very difficult to take an electrical signal out from rotating parts. A novel optical reflectance based non-contact temperature measurement technique is discussed which can be used for temperature measurement on metal surfaces. The optical reflectivity of metals is known to depend on metal temperature and wavelength of the incident light. An increase in metal temperature resulted in the change (increase or decrease depending on particular metal properties) of reflected laser power from the metal surface. This also depends on the surface geometries of the metal surface being measured. We have shown that the sensitivity of the temperature measured depends on the angle of incidence, surface topology and surface properties of the object.

Paper Details

Date Published: 13 May 2010
PDF: 8 pages
Proc. SPIE 7726, Optical Sensing and Detection, 772619 (13 May 2010); doi: 10.1117/12.853221
Show Author Affiliations
Chayan Mitra, GE Global Research (India)
Ayan Banerjee, Indian Institute of Science Education and Research (India)
Sandip Maity, GE Global Research (India)
Norman Turnquist, GE Global Research (United States)

Published in SPIE Proceedings Vol. 7726:
Optical Sensing and Detection
Francis Berghmans; Anna Grazia Mignani; Chris A. van Hoof, Editor(s)

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