Laser Doppler velocimetry – measuring principle for precise length and speed measurement

Laser Surface Velocimeters operate according to the laser Doppler measurement principle, evaluating the backscattered laser light from a moving object, surface and typically moving belts in continuous production processes. Polytec LSV Laser Surface Velocimeters use the heterodyne detection method, which allows to detect the direction of motion and even standstill. This differential measurement technique provides outstanding precision that is independent from the velocity, allowing to even detect the slightest movements on strip goods and continuous goods. LSV length and speed sensors measure without contact avoiding slippage and wear for utmost precision in production process control.
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