Light scattering method and apparatus for detecting particles in

Details Light scattering method and apparatus for detecting particles in Light scattering method and apparatus for detecting particles in

1989-05-30

1991-07-23

Rosenberger, Richard A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356436, G01N 2100

Patent

active

050338510

ABSTRACT:
A method and apparatus for detecting particles contained in a liquid sample includes using a nozzle to form the liquid sample into an unconfined stream having substantially flat sides and directing the stream into intersection with a laser beam in the external cavity of a laser, wherein the sides of the stream are oriented at the Brewster angle with respect to the laser beam. Light scattered from the laser beam by particles in the liquid stream as they pass through the laser beam is collected and directed by a lens to a photodetector which, in response to the impinging scattered light, emits signals for counting and measuring the particles contained in the liquid stream.

REFERENCES:
patent: 3406289 (1968-10-01), Schleusener
patent: 3766489 (1973-10-01), Rosenberg et al.
patent: 3840304 (1974-10-01), Hirafuji
patent: 4281924 (1981-08-01), Auer et al.
patent: 4571079 (1986-02-01), Knollenberg
patent: 4842406 (1989-06-01), VonBargen
patent: 4854705 (1989-08-01), Bachalo

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