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Electro-Optical Instrumentation: Sensing and Measuring with Lasers by Silvano Donati - University of Pavia

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Chapter 6Laser Doppler Velocimetry

The Laser Doppler Velocimeter, (LDV) was invented in 1964 by Yeh and Cummins [1] and soon became another bright chapter of optoelectronic instrumentation. The first commercial velocimeter appeared in the market soon after the laser interferometer, that is, about the year 1970. Since then, velocimeters sold in several thousand unit-per-year [2] volume and have been recognized as an unparalleled tool for non-contact measurements of flow velocity in fluids [3]. The fluid can be either a liquid or a gas, and the velocity is desired for test, diagnostics and design applications to hydraulics, fluidics and wind tunnel. Because of the application, velocimeters are also called Laser Doppler Anemometers (LDA) and sometimes ...

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