| 摘要 |
PROBLEM TO BE SOLVED: To simplify a structure by dispensing with a circulation mechanism and an agitation mechanism for a medium liquid including a specimen under measurement. SOLUTION: The lower part of a specimen cell lengthened in its vertical direction is illuminated with laser light to measure particle distribution from the spacial intensity distribution of its scattered light. After once dispersing particles in a measurement cell uniformly, the specimen cell is left at rest to start the measurement of the scattered light. Assuming that measurement time is t seconds and a distance covered by a sedimenting particle D3 in t seconds is X3, the particle diameter of the particle D3 being largest, only distances X2 and X1 smaller than X3 are covered by sedimenting particles D2 and D1 of smaller diameters. Accordingly, particle distribution has no deviation in a laser-illuminated part lower than the distance X3, making it possible to measure accurate particle size distribution on the whole group of particles without being affected by particle sedimentation. COPYRIGHT: (C)2006,JPO&NCIPI
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