Abstract

A digital polar nephalometer has been constructed to measure the intensity and polarization of light pulses scattered at 94 angles from 9° to 176° from monodisperse aerosol particles of controlled shape. The dye laser gave 20-kW, 4-nsec pulses at 0.627 μm. Data from polystyrene latex spheres agrees with Mie theory within about 10%. Data for spheroidal and quasi-cubical particles are shown. It is found that the backscatter from nonspherical particles of size parameter ≈10 differs significantly from that for the best-fit sphere, so that a tumbled irregular particle is not equivalent to a sphere.

© 1979 Optical Society of America

Light scattering properties of spheroidal particles

Shoji Asano
Appl. Opt. 18(5) 712-723 (1979)

Polarized light scattered from monodisperse randomly oriented nonspherical aerosol particles: measurements

R. G. Pinnick, D. E. Carroll, and D. J. Hofmann
Appl. Opt. 15(2) 384-393 (1976)

Optical particle sizing for in situ measurements Part 1

Don Holve and Sidney A. Self
Appl. Opt. 18(10) 1632-1645 (1979)

Light scattering by randomly oriented spheroidal particles

Shoji Asano and Makoto Sato
Appl. Opt. 19(6) 962-974 (1980)

Dynamics of structural changes in biological particles from rapid light scattering measurements

S. J. Morris, H. A. Shultens, M. A. Hellweg, G. Striker, and T. M. Jovin
Appl. Opt. 18(3) 303-311 (1979)