Article | REF: AF3460 V1

Particle scattering of laser beams

Authors: Gérard GOUESBET, Gérard GRÉHAN

Publication date: July 10, 1998, Review date: July 1, 2015

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7. Phase-Doppler technique

The aim of phase-Doppler anemometry is to measure the speed and size of individual particles in situ in a flow. In principle, this method requires no calibration.

This paragraph is divided into three sub-paragraphs:

  • the first is dedicated to presenting the principle of the technique;

  • the second takes a closer look at the effect of trajectory ambiguity, due to the finite lateral extension of laser beams;

  • the third describes the extensions currently being developed for this technique, which exploit the finite aspect of laser beams.

7.1 Fundamental principle of technology

The principle of phase-Doppler anemometry...

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Phase-Doppler technique