High detection rate particle identifier

Details High detection rate particle identifier High detection rate particle identifier

2005-12-06

2005-12-06

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S222200

Reexamination Certificate

active

06972424

ABSTRACT:
An improvement is described for use in a system that identifies particles in a fluid such as water by passing the fluid through a passage in a transparent carrier and detecting light from a laser beam that is scattered by particles, followed by comparing the scatter pattern to those of known particles, which increases the rate at which particles are detected. A plurality of transparent carriers with through passages are provided, and a narrow beam is directed through each carrier to scatter light from particles at a detect zone in each carrier passage. In one arrangement (60), the carriers (62, 64, 66) are connected in series, so a limited amount of water passes through detect zones (24A,24B.24C) to generate a high rate of particle detection. In another arrangement (130), the carrier passages are connected in parallel, so when a larger sample of water is available different parts of the water sample pass through different carrier passages, to again increase the rate of particle detection.

REFERENCES:
patent: 3770351 (1973-11-01), Wyatt
patent: 3901602 (1975-08-01), Gravatt et al.
patent: 4070113 (1978-01-01), Frazer et al.
patent: 4173415 (1979-11-01), Wyatt
patent: 4265538 (1981-05-01), Wertheimer
patent: 4548500 (1985-10-01), Wyatt et al.
patent: 4565448 (1986-01-01), Abbott et al.
patent: 4639137 (1987-01-01), Hazan et al.
patent: 4702598 (1987-10-01), Böhmer
patent: 4728190 (1988-03-01), Knollenberg
patent: 4906094 (1990-03-01), Ashida
patent: 4907884 (1990-03-01), Stevens et al.
patent: 4942305 (1990-07-01), Sommer
patent: 4952055 (1990-08-01), Wyatt
patent: 4987539 (1991-01-01), Moore et al.
patent: 5125737 (1992-06-01), Rodriguez et al.
patent: 5247340 (1993-09-01), Ogino
patent: 5305071 (1994-04-01), Wyatt
patent: 5414508 (1995-05-01), Takahashi et al.
patent: 5436465 (1995-07-01), Borden et al.
patent: 5534999 (1996-07-01), Koshizuka et al.
patent: 5627040 (1997-05-01), Bierre et al.
patent: 5737078 (1998-04-01), Takarada et al.
patent: 5999256 (1999-12-01), Jones et al.
patent: 6023324 (2000-02-01), Myers
patent: 6100541 (2000-08-01), Nagle et al.
patent: 6118531 (2000-09-01), Hertel et al.
patent: 6120734 (2000-09-01), Lackie
patent: 6313908 (2001-11-01), McGill et al.
patent: 6421121 (2002-07-01), Haavig et al.
patent: 2317228 (1998-03-01), None
“Recent Overview Article—Aerosol Characterization Research at the University of Hertfordshire”, by Prof. Paul Kaye, STRC Particle Instruments Research Group, Science and Technology Research Centre, University of Hertfordshire, Hatfield, United Kingdom, reproduced from the Aerosol Society Newsletter, No. 33, Sep. 18-20, 1998.
“Discrimination of phytoplankton via light-scattering properties”, by Philip J. Wyatt and Christian Jackson, Limnology And Oceanography, 34(1), 1989, pp. 96-112, American Society of Limnology and Oceanography, Inc.

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