Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-04-29
1989-12-05
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356339, G01N 1506
Patent
active
048854735
ABSTRACT:
An apparatus and method for detecting particles in a clean environment provides for forming a beam of electromagnetic radiation into an instantaneous scattering volume and scanning the scattering volume in space defined by a flow cell. Particles are transported by fluid means into the space occupied by the scattering volume and individual particles are multiply scanned while passing through the scanning scattering volume. A fluid conduit is provided to transport the fluid and the particles and windows are provided to transmit the radiation beam into the space defined by the flow cell and to transmit scattered radiation from the particles out of the space. The radiation from the particles is collected and detected to provide an output signal. In the preferred embodiment, the output signal is analyzed to determine the concentration of the particles in the fluid and to determine the size and velocity of each individual particle.
REFERENCES:
patent: 3279305 (1962-03-01), Akinor et al.
patent: 3603689 (1969-10-01), Shelnutt
patent: 3797937 (1974-03-01), Shofner
patent: 3879615 (1975-04-01), Moser
patent: 4249244 (1981-02-01), Shofner et al.
patent: 4396286 (1983-08-01), Shofner et al.
patent: 4473296 (1984-09-01), Shofner et al.
patent: 4697925 (1987-10-01), Hyodo et al.
Technical Paper, (6/6/87, San Francisco), entitled "An Inline Optical Particle Counter for High Purity Pressurized Gases", Authors--Gerhard Kreikebaum, Arthur C. Miller, Jr., and Frederick M. Shofner.
Brochure--(5/88)--PPM's Aerosol Scanner.
Brochure--(10/87)--PPM's Handheld Aerosol Monitor.
Brochure--(10/87)--PPM's Multiple Sensor Continuous Aerosol Monitor Cam--TX.
Kreikebaum Gerhard
Miller, Jr. Arthur C.
Shofner Frederick M.
Nelms David C.
Shofner Engineering Associates, Inc.
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