MULTIPLE SCATTERING OF NARROW LIGHT BEAMS IN AEROSOLS

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Authors
  1. Bissonnette, L.R.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A multiple scattering propagation model of narrow light beams in aerosol media is described. It is based on a paraxial approximation of the radiative transfer equation in which the flux normal to the incident beam direction is modeled by a diffusion process. The model solutions are the forward- and backscattered intensity profiles for the specified geometry and reciver aperture and field of view. The required inputs are the system parameters, and the aerosol single scattering angular phase function and extinction and scattering coefficients which are allowed to vary along the beam axis. Good agreement is shown with measurements performed in the laboratory over scales ranging from a few tens of mm to a few m, and in the atmosphere over a scale of the order of 1 km. The solutions are valid for optical depths smaller than or equals to 10, for phase functions corresponding to average size parameters of order one or greater, and for off-axis positions not exceeding or equals to 25% of the reciprocal of the scattering coefficient.
Keywords
Extinction coefficients;Radiative transfer equation;Modelling
Date of publication
29 Mar 1994
Number of Pages
9
Reprinted from
Appl Phys B, no 60, 1995, p 315-323
DSTKIM No
95-03119
CANDIS No
152221
Format(s):
Document Image stored on Optical Disk;Hardcopy

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