Journal of the European Optical Society - Rapid publications, Vol 1 (2006)
Laser Doppler imaging of microflow
Abstract
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.
© The Authors. All rights reserved. [DOI: 10.2971/jeos.2006.06025]
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