Particle counter employing a solid-state laser with an intracavi

Details Particle counter employing a solid-state laser with an intracavi Particle counter employing a solid-state laser with an intracavi

1996-03-08

1997-06-24

Rosenberger, Richard A.

Optics: measuring and testing

By particle light scattering

With photocell detection

2502222, 372 22, G01N 1506

Patent

active

056421931

ABSTRACT:
A particle detector employs a laser having a solid-state lasing medium, such as an Nd:YAG crystal, disposed in a resonant cavity, and includes an intracavity view volume. The resonant cavity is defined by two spaced apart mirrors, with the laser medium positioned between them, defining a light path. A pump source is optically coupled to drive the laser medium to produce coherent light having a first wavelength. The view volume is positioned in the light path, between the first mirror and the laser medium, to introduce particles into the resonant cavity so that light impinging thereupon produces scattered light. A detector is disposed to sense light scattered from the view volume and produces signals proportional to the light sensed. A displaying device, such as a pulse height analyzer, is in electrical communication to receive the signals produced by the detector to quantitatively display the intensity of the light sensed. In an alternate embodiment, a harmonic generator is disposed within the light path to shorten the wavelength of light impinging upon particles in the view volume, making the detector more sensitive to particles of sub-micron size.

REFERENCES:
patent: 4571079 (1986-02-01), Knollenberg
patent: 4594715 (1986-06-01), Knollenberg
patent: 4746215 (1988-05-01), Gross
patent: 5084879 (1992-01-01), Suzuki et al.
patent: 5085500 (1992-02-01), Blesener
patent: 5092675 (1992-03-01), Sommer
patent: 5121988 (1992-06-01), Blesener et al.
patent: 5135304 (1992-08-01), Miles et al.
patent: 5191588 (1993-03-01), Dacquay
patent: 5317447 (1994-05-01), Baird et al.
patent: 5483546 (1996-01-01), Johnson et al.
Burton G. Schuster et al., "Detection and Sizing of Small Particles in an Open Cavity Gas Laser", Applied Optics, vol. 11, No. 7, pp. 1515-1520, (Jul. 1972).
Robert G. Knollenberg et al., "Open Cavity Laser `Active` Scattering Particle Spectrometry from 0.05 to 5 Microns", Fine Particles--Aerosol Generation, Measurement, Sampling, and Analysis, Academic Press, pp. 669-696, (May, 1975).

Affiliated with

Also associated with

Rating

Particle counter employing a solid-state laser with an intracavi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Particle counter employing a solid-state laser with an intracavi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Particle counter employing a solid-state laser with an intracavi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-152112