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Proceedings Paper

Refractive index determination as a tool for temperature measurement and process control: a new approach
Author(s): Johannes K. Schaller; S. Wassenberg; Detlev K. Fiedler; Christo G. Stojanoff
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Paper Abstract

Recently a new method for temperature measurement of droplets was presented. This method determines the index of refraction of a spherical scatterer with high accuracy and utilizes the dependence of the index of refraction on the temperature to finally determine the temperature. In this paper we show that the method is likewise applicable to cylindrical scatterers with a homogeneous refractive index distribution, like liquid jets. The method can be used to optically determine the temperature of a liquid jet, or to measure other properties of the liquid that influence the index of refraction of that liquid. One such property is the concentration of one liquid in another, like that of glycerol in an aqueous solution, which was studied experimentally for assessing some properties of the proposed method. An estimation of the sensitivity of the method was gained by detecting temperature changes of a cylindrical water jet.

Paper Details

Date Published: 15 November 1994
PDF: 8 pages
Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); doi: 10.1117/12.194335
Show Author Affiliations
Johannes K. Schaller, RWTH Aachen (Germany)
S. Wassenberg, RWTH Aachen (Germany)
Detlev K. Fiedler, RWTH Aachen (Germany)
Christo G. Stojanoff, RWTH Aachen (Germany)

Published in SPIE Proceedings Vol. 2248:
Optical Measurements and Sensors for the Process Industries
Christophe Gorecki; Richard W. T. Preater, Editor(s)

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