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Proceedings Paper

Development of a transfer standard for laser thermometry
Author(s): C. J. Rieck; B. Boedefeld; Reinhard Noll; G. J. Edwards; S. Boyes; Michel Pealat; P. Bouchardy; N. Dorwal; Joachim Fischer; M. Stock
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Paper Abstract

The measurement of gas temperatures is important in many combustion, chemical manufacturing and materials processing applications. Different laser spectroscopic methods are applied to measure the temperature of gases. Nevertheless, up to now none of these methods have been calibrated against the international temperature scale of 1990. A transfer standard for laser thermometry has been developed to calibrate laser thermometry techniques. The standard provides optical access to a sample volume of a gas maintained at a stable temperature within the range of 300 K to 1850 K. The gas temperature is measured using built-in, calibrated thermometers including thermocouples. Accufiber optical-fiber probes and an optical pyrometer for traceability to the ITS-90. Broadband coherent anti-stokes raman scattering (CARS) and scanning CARS experiments have been performed inside the furnace. The measuring uncertainty of broadband CARS amounts to less than 4 percent between room temperature and 800 K. At temperatures between 800 K and 1850 K an uncertainty of less than 2 percent has been achieved. For scanning CARS the uncertainty and the precision amounts to 2 percent between 295 K and 1850 K.

Paper Details

Date Published: 23 May 1997
PDF: 12 pages
Proc. SPIE 3107, Remote Sensing of Vegetation and Water, and Standardization of Remote Sensing Methods, (23 May 1997); doi: 10.1117/12.274743
Show Author Affiliations
C. J. Rieck, Fraunhofer-Institut fuer Lasertechnik (Germany)
B. Boedefeld, Fraunhofer-Institut fuer Lasertechnik (Germany)
Reinhard Noll, Fraunhofer-Institut fuer Lasertechnik (Germany)
G. J. Edwards, National Physical Lab. (United Kingdom)
S. Boyes, National Physical Lab. (United Kingdom)
Michel Pealat, ONERA (France)
P. Bouchardy, ONERA (France)
N. Dorwal, ONERA (France)
Joachim Fischer, Physikalisch-Technische Bundesanstalt (Germany)
M. Stock, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 3107:
Remote Sensing of Vegetation and Water, and Standardization of Remote Sensing Methods
Giovanna Cecchi; Torsten Lamp; Rainer Reuter; Konradin Weber, Editor(s)

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