Light Scattering from Irregular Dielectric Particles.
Abstract
A digital polar nephalometer has been constructed to measure the intensity and polarization of light pulses scattered into 94 angles from 9 to 176 deg. from monodisperse aerosol particles of controlled shape. The light source was a tunable dye laser giving 10 kW 4 ns pulses, operated at 627 nm. Calibration data from polystyrene latex spheres agrees with Mie theory within about 10%. Data for spheroidal 2 micrometers cladosporium and quasi-cubical 4 micrometers NaCl particles are shown. It is found that the backscatter from non-spherical particles (of size parameter about 10) differs significantly from that for the best fit sphere, so that a tumbled irregular particle is not equivalent to a sphere.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 28, 1978
- Accession Number
- ADA055835
Entities
People
- Gray Ward
Organizations
- University of Florida