Particle counter with photointensity compensation

Details Particle counter with photointensity compensation Particle counter with photointensity compensation

1989-07-19

1991-02-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356339, G01N 1506, G01N 2149, G01N 2185

Patent

active

049907956

ABSTRACT:
A particle counter for measuring the concentration and particle-size distribution of minute particles in a fluid by irradiating the particles with a laser beam from a direction that is substantially perpendicular to the fluid flow direction and by detecting the light scattered from the particles. The laser beam, prior to irradiating the particles, is flattened with a lens system and its otherwise Gaussian photointensity distribution is converted to a square pattern with a slit member. The light scattered from a central portion of the fluid is detected and formed into a real image with a focusing lens system and a detecting slit that cuts the real image only in the irradiating direction. The scattered light may be detected from a third direction that is substantially perpendicular to the flow direction and the irradiating direction.

REFERENCES:
patent: 3703641 (1972-11-01), Rosen
patent: 3786261 (1974-01-01), Tucker
patent: 3901602 (1975-08-01), Gravatt, Jr.
patent: 4242194 (1980-12-01), Steiner et al.
patent: 4247783 (1981-01-01), Berber et al.
patent: 4265538 (1981-05-01), Wertheimer
patent: 4318180 (1982-03-01), Lundqvist et al.
patent: 4676641 (1987-06-01), Bott
patent: 4781459 (1988-11-01), Suzuki
patent: 4783599 (1988-11-01), Borden
patent: 4830494 (1989-05-01), Ishikawa et al.

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