Optics: measuring and testing – For size of particles – By particle light scattering
Patent
1984-11-06
1987-09-15
Rosenberger, R. A.
Optics: measuring and testing
For size of particles
By particle light scattering
356343, 250227, G01N 1502
Patent
active
046936025
ABSTRACT:
The measurement of the scattering properties of very small particles by electro-optical means generally requires the use of an intense, though highly spatially inhomogeneous, light source such as a laser. Many instruments require, therefore, that the intersection of the particle stream with the illumination source be precisely regulated so that the flux incident on the particle be known accurately. A method and apparatus are described by which means the absolute intensity of the light incident on the particle need not be known. A special structure and measurement process are described by which means small particles are differentiated from larger particles grazing the illumination beam.
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"A Polarization-Modulated Light Scattering Instrument for Determining Liquid Aerosol Properties", Hunt et al, Applied Physics, 1975.
"Passive Remote Smoke Plume Opacity Sensing: A Technique", Lilenfeld et al, Applied Optics, vol. 20, #S, 1981.
Phillips Steven D.
Wyatt Philip J.
Cooper Crystal D.
Rosenberger R. A.
Wyatt Philip J.
Wyatt Technology Corporation
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