Temperature profile measurement with a multiple-pass laser beam deflection probe

Janez Diaci; Janez Ivan Mozina

doi:10.1117/12.221710

25 September 1995 Temperature profile measurement with a multiple-pass laser beam deflection probe

Janez Diaci, Janez Ivan Mozina

Proceedings Volume 2510, Fiber Optic and Laser Sensors XIII; (1995) https://doi.org/10.1117/12.221710
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

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.

Citation Download Citation

Janez Diaci and Janez Ivan Mozina "Temperature profile measurement with a multiple-pass laser beam deflection probe", Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); https://doi.org/10.1117/12.221710

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