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Proceedings Paper

Temperature profile measurement with a multiple-pass laser beam deflection probe
Author(s): Janez Diaci; Janez Ivan Mozina
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Paper Abstract

We report noncontact measurement of temperature profiles in fluids by means of a novel laser beam deflection probe. We use optoacoustic generation by a pulsed Nd:YAG laser to emit a short acoustic transient wave within the fluid region under study. Propagation region several times before it reaches the deflection-detecting photodetector. A single oscilloscope trace of the photodetector output gives us then the timing of the acoustic wavefront at several distances from the source. By measuring the acoustic wavefront transit times and the distance between the probe beam segments we can determine local sound velocity and there from the local temperature.

Paper Details

Date Published: 25 September 1995
PDF: 10 pages
Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); doi: 10.1117/12.221710
Show Author Affiliations
Janez Diaci, Univ. of Ljubljana (Slovenia)
Janez Ivan Mozina, Univ. of Ljubljana (Slovenia)

Published in SPIE Proceedings Vol. 2510:
Fiber Optic and Laser Sensors XIII
Ramon P. DePaula; John W. Berthold III, Editor(s)

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