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Proceedings Paper

New differential laser microanemometer
Author(s): B. Reuter; N. Talukder
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Paper Abstract

A laser microanemometer has been developed for contactless measurement of flow velocity distributions in the immediate vicinity of vessel walls. This new anemometer is basically a microscope using incident coherent light and spatial frequency plane filtering for noise suppression. Velocities of submicroscopic particles suspended in the fluid and backscattering the laser light are measured using a modulating prism grating, a differential photodetection system and a digital correlator. With this system a flow velocity distribution can be analysed with a spatial resolution approaching the theoretical resolution limit given by the numerical aperture of the objective lens. Flow velocity profiles in glass capillaries could be measured down to wall distances on the order of 1 micron (μm) for water as well as human blood plasma.

Paper Details

Date Published: 15 May 1981
PDF: 5 pages
Proc. SPIE 0236, 1980 European Conf on Optical Systems and Applications, (15 May 1981); doi: 10.1117/12.959015
Show Author Affiliations
B. Reuter, Abteilung fur Angewandte Optik and Abteilung fur Physiologie (Germany)
N. Talukder, Abteilung fur Angewandte Optik and Abteilung fur Physiologie (Germany)

Published in SPIE Proceedings Vol. 0236:
1980 European Conf on Optical Systems and Applications
D. J. Kroon, Editor(s)

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