Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-10-25
1992-08-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250574, 356338, G01V 904
Patent
active
051421402
ABSTRACT:
An apparatus for counting and analyzing sample particles such as cells suspended in a fluid by applying an irradiation beam such as a laser beam to the sample particles in a flow cell. The apparatus includes a device for supplying a flow cell with suspension of sample particles, an optical system for applying a laser beam to the sample particles in the above-mentioned suspension, a light gathering device for forming image of the above-mentioned sample particles, a light sensing device for sensing light from the above-mentioned formed image of the sample particles, and an analysis for analyzing the above-metnioned sample particles on the basis of the above-mentioned sensed light. The optical system may include a polarizing beam splitter and such convergent lenses having mutually different magnifications relative to two directions perpendicular to the optical axis of the laser beam.
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patent: 3612688 (1971-10-01), Liskowitz
patent: 4072421 (1978-02-01), Coyne et al.
patent: 4548499 (1985-10-01), Eisert et al.
patent: 4572676 (1986-02-01), Biermans et al.
patent: 4636075 (1987-01-01), Knollenberg
Kaneko Toshio
Kataoka Keiji
Ohki Hiroshi
Yamazaki Isao
Davenport T.
Hitachi , Ltd.
Nelms David C.
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