Particle measuring device with elliptically-shaped scanning beam

Details Particle measuring device with elliptically-shaped scanning beam Particle measuring device with elliptically-shaped scanning beam

1988-12-30

1990-04-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356338, G01N 1506

Patent

active

049202758

ABSTRACT:
A particle measuring device having a light source, scanning means for optically scanning a light from the light source in a direction intersecting the direction of passage of particles to be examined in a portion to be examined through which the particles to be examined pass, means for making the shape of the scanning light applied to the particles to be examined into a shape longer than the length of the particles to be examined in the direction of passage of the particles to be examined, and light receiving means for receiving the light from the portion to be examined.

REFERENCES:
patent: 3918812 (1975-11-01), Holm
patent: 4577964 (1986-03-01), Hansen, Jr.
patent: 4636075 (1987-01-01), Knollenberg
patent: 4827144 (1989-05-01), Zaitsu et al.

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