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Proceedings Paper

In-situ measurement of the water vapor concentration in industrial ovens by a user-friendly semiconductor laser system
Author(s): Peter Kohns; R. Stoermann; E. Budzynski; N. Walter; J. Knoop; R. Kuester
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Paper Abstract

Laser diodes are very promising tools for spectroscopic applications, e.g. for the contactless analysis of gases. We describe a prototype of a laser diode spectrometer which fulfills industrial requirements. We present results obtained at a brick-kiln over a period of several months. In this special application information about the moisture of the gas in the oven was required to optimize the baking process. In order to obtain an absorption signal without strong temperature dependence a special absorption line at (lambda) equals 1303.5 nm was selected. This wavelength was generated by a distributed feedback laser diode. Due to a normalization technique we obtained stable signals even at high dust loads within the measure volume.

Paper Details

Date Published: 17 September 1997
PDF: 8 pages
Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); doi: 10.1117/12.281202
Show Author Affiliations
Peter Kohns, Optikzentrum NRW (Germany)
R. Stoermann, Optikzentrum NRW (Germany)
E. Budzynski, Optikzentrum NRW (Germany)
N. Walter, Optikzentrum NRW (Germany)
J. Knoop, Optikzentrum NRW (Germany)
R. Kuester, Optikzentrum NRW (Germany)

Published in SPIE Proceedings Vol. 3098:
Optical Inspection and Micromeasurements II
Christophe Gorecki, Editor(s)

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