Monitor for particles of various materials

Details Monitor for particles of various materials Monitor for particles of various materials

1987-03-26

1989-05-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, 356339, G01N 1506

Patent

active

048271438

ABSTRACT:
A monitor for particles of various materials which counts the number of the particles on real-time and in situ basis. The monitor comprises a unit for illuminating an object to be inspected with an illumination light beam of a predetermined cross-sectional area, a unit for detecting a change in optical mode of the illumination light beam caused by the particles being contained in the inspected object and illuminated with the illumination light beam, the illuminating and detecting units being of a unitary structure, and a unit for counting an amount of the particles contained in the inspected object by using a change in intensity of an optically mode changed light beam.

REFERENCES:
patent: 4146799 (1979-03-01), Pitt et al.
patent: 4267509 (1981-05-01), Graham
patent: 4420256 (1983-12-01), Fladda et al.
patent: 4678326 (1987-07-01), Harjunmaa
patent: 4696571 (1987-09-01), Goldberg et al.
patent: 4707134 (1987-11-01), McLachlan et al.
Van Nostrand's Scientific Encyclopedia, Fifth Edition, edited by Douglas Considine, Van Nostrand Reinhold Co. 1976, p. 1606.

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