Abstract

Forced vibration of objects is used to transform physical quantities into the amount of the Doppler shift. By combining this with a real time Doppler imaging system, a method of real time imaging of classified objects is proposed. As an example, particles are vibrated through the vibration of a water cell, which includes the particles in it. The possibility of real time display of these particles classified according to size or weight is discussed. The display of particles of different size or weight by distinct color on a TV monitor in real time seems most interesting.

© 1977 Optical Society of America

Real-time measurements of spatial velocity distribution with a laser Doppler imaging system

Takeaki Yoshimura, Hirohiko Sakashita, and Nobuo Wakabayashi
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Laser Doppler particle measuring system using forced vibration synchronized detection and power spectral analysis

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Laser Doppler particle measuring system using nonsinusoidal forced vibration and bispectral analysis

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Instrument for the monochromatic observation of all sky auroral images

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