Laser diffraction-type particle size distribution measuring method and apparatus
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United States of America Patent
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Jun 27, 1995
Grant Date -
N/A
app pub date -
Oct 8, 1993
filing date -
Oct 11, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A particle-size distribution measuring apparatus and method is provided for suspending a sample containing particles in a fluid and introducing the suspended particles into a sample cell. The sample cell is illuminated with light from a laser source and the diffracted light from the particles is measured by an optical detector array. A computer circuit is capable of computing a plurality of graphs of particle-size distribution in repetitive measurement over a predetermined time period. A video display discloses the plurality of graphs in a juxtapositioned arrangement or stacked arrangement to enable the observer to distinguish between any variations in adjacent graphs.
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