Particle size measuring instrument with direct scattered light detection
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United States of America Patent
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-
Apr 17, 1990
Grant Date -
N/A
app pub date -
Jul 11, 1988
filing date -
Jul 11, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an instrument for measuring the size of particles entrained in a fluid stream, photodetectors are mounted on the walls of tubing shaping the flow of the fluid stream through a laser beam. The photodetectors generate electric current pulses in response to scattering of the light which is generated by the particles passing through the laser beam. The pulses generated by the photodetectors provide a measurement of particle size. The photodetectors are mounted either adjacent to the laser beam on the tubing walls or, alternatively, the tubing walls are mirrored above and below the laser beam and the photodetectors are mounted on the tubing walls at right angle bends of the tubing to receive the light reflected from the mirrored surfaces.
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