Determining the volume and the volume distribution of suspended

Details Determining the volume and the volume distribution of suspended Determining the volume and the volume distribution of suspended

1976-11-05

1979-01-16

Clark, Conrad J.

Optics: measuring and testing

For size of particles

By particle light scattering

250574, G01N 1502, G01N 2100, G01N 2126

Patent

active

041346793

ABSTRACT:
A histogram of the volume of the particles in a sample of fluid-suspended particles, including those in the submicron region, can be obtained by using an incident light beam having a wavelength approximately twice the average particle diameter in each of the ranges of particle sizes making up the histogram. The 90.degree. scatter from the sample is measured in two orthogonal polarizations. The first polarization has its electric vector perpendicular to the plane containing the point of observation and the incident light beam and the second is parallel to that plane. The magnitude of the light flux having the second polarization is subtracted from that having the first polarization in each range to give a measure of the volume of the particles in that range.

REFERENCES:
patent: 3603689 (1971-09-01), Shelnutt
patent: 3653767 (1972-04-01), Liskowitz
patent: 3835315 (1974-09-01), Gravitt
patent: 4053236 (1977-10-01), Atwood
Barsic et al., Light Scattering: Polarization Ratio Methods, National Technical Information Service, pp. 167-174.

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