| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 1, 2006
|
|
|---|---|---|
| Article Number | 06025 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.2971/jeos.2006.06025 | |
| Published online | 20 November 2006 | |
Regular papers
Laser Doppler imaging of microflow
1
Laboratoire Kastler-Brossel, École Normale Supérieure, UMR 8552 (ENS, CNRS, UMPC), 24 rue Lhomond 75231 Paris cedex 05, France
2
Laboratoire Microfluidique, MEMS, Nanostructures, ESPCI, CNRS UPR A0005, Université Pierre et Marie Curie, 10 rue Vauquelin 75005 Paris, France
Received:
13
September
2006
We report a pilot study with a wide-field laser Doppler detection scheme used to perform laser Doppler anemometry and imaging of particle-seeded microflow. The optical field carrying the local scatterers (particles) dynamic state, as a consequence of momentum transfer at each scattering event, is analyzed in the temporal frequencies domain. The setup is based on heterodyne digital holography, which is used to map the scattered field in the object plane at a tunable frequency with a multipixel detector. We show that wide-field heterodyne laser Doppler imaging can be used for quantitative microflow diagnosis; in the presented study, maps of the first-order moment of the Doppler frequency shift are used as a quantitative and directional estimator of the Doppler signature of particles velocity.
Key words: Laser Doppler anemometry / microflow / Doppler imaging
© The Author(s) 2006. All rights reserved.
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