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
      Meteorology
      Lasers and Masers
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE