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Laser-Zwei-Focus Velocimetry (L2F)

DLR-Institut für Antriebstechnik

The measurement principle of L2F is rather simple. The L2F-measuring device generates two highly focused light beams in the probe volume which act as a 'light gate' for tiny particles in the flow. The scattered light from the particles provides two successive pulses and from the time interval between the pulses the velocity perpendicular to the Laser beams can be derived.

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