Nephelometer

Details Nephelometer Nephelometer

1981-06-18

1983-03-01

Corbin, John K.

Optics: measuring and testing

For size of particles

By particle light scattering

356339, 356341, 356343, G01N 1502

Patent

active

043753345

ABSTRACT:
A nephelometer and method for measuring optical quality of a marine atmosphere and particularly characterizing its aerosol particle size distribution, visual range and aerosol optical effects in the visible and infrared. There is provided a housing for entrapping a momentary aerosol sampling, a laser source for providing a narrow collimated beam of radiant energy (usually light) through the sample, and plural spaced-apart cosine sensors facing across the radiant energy illuminated sample, with one reading a slightly greater angle than the other, for receiving aerosol particle scattered light. Integrated outputs from the sensors when compared with laser output intensity as a reference signal provide an indication of aerosol particle size distribution and concentration.

REFERENCES:
patent: 2626361 (1953-01-01), Martine
patent: 3563661 (1971-02-01), Charlson et al.
patent: 3953127 (1976-04-01), Ahlquist et al.
patent: 4123665 (1978-10-01), Frungel
Beuttell et al., "Instruments for the Measurement of the Visual Range," J. ci. Instru., vol. 26, pp. 357-359, Nov. 1949.

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