Accession Number : ADD013519
Title : Nephelometer.
Descriptive Note : Patent, Filed 18 Jun 81, patented 1 Mar 83,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Gerber, Hermann E
Report Date : 01 Mar 1983
Pagination or Media Count : 9
Abstract : Described is 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.
Descriptors : *AEROSOLS, *MARINE ATMOSPHERES, *NEPHELOMETERS, *PATENTS, OPTICAL PROPERTIES, DISTRIBUTION, PARTICLE SIZE, ENERGY, INTENSITY, LASERS, OUTPUT, LIGHT SCATTERING, PARTICLES, SAMPLING, INTEGRATED SYSTEMS, SOURCES, MEASUREMENT, DETECTORS, RANGE(DISTANCE), VISUAL PERCEPTION, CLOUD PHYSICS, COLLECTING METHODS, RADIATION, DETECTORS
Subject Categories : Test Facilities, Equipment and Methods
Lasers and Masers
Optical Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE