OFF-AXIS PROPAGATION OF A LASER BEAM IN LOW VISIBILITY WEATHER CONDITIONS

Authors
  1. Tam, W.G.
  2. Zardecki, A.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The role of non-small-angle scattering is examined for off-axis laser beam propagation under low visibility weather conditions. The near-axis radiance distribution function is obtained from a radiative transfer equation with the aid of the small-angle approximation. The contribution of the non-small-angle scattering is described via another transfer equation with the on-axis radiance as an external source, and this equation is solved in the diffusion approximation. Numerical results for radiational and advective fogs are presented to show the importance of non-small-angle scattering in the case of off-axis detection.
Date of publication
01 Jan 1980
Number of Pages
6
Reprinted from
Applied Optics, vol 19, no 16, 1980, p 2822-2827
DSTKIM No
80-03284
CANDIS No
90963
Format(s):
Hardcopy

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