Abstract
The existing theory of imaging through an aerosol medium based on the small-angle approximation to radiative transfer is extended to the general case of multiple scattering with an arbitrary degree of anisotropy. By applying the discrete-ordinates finite-element radiation transport code twotran, we compute the modulation transfer function for a medium characterized by optical depth, single-scattering albedo, and asymmetry parameter. To partially suppress the ray effect in the discrete-ordinates solution to the transfer equation, the first-collision source approach is employed. The results of our modeling which apply to the case of incoherent imaging indicate a strong dependence on the angular divergence of an isotropic source of radiation. Distinctions between the coherent and incoherent illumination cases are stressed, and the earlier small-angle approximation results are rederived.
© 1984 Optical Society of America
Full Article | PDF ArticleMore Like This
A. Zardecki, S. A. W. Gerstl, and J. F. Embury
Appl. Opt. 22(9) 1346-1353 (1983)
A. Zardecki, S. A. W. Gerstl, W. G. Tam, and J. F. Embury
J. Opt. Soc. Am. A 3(4) 393-400 (1986)
Deric J. Gray
Appl. Opt. 51(28) 6753-6764 (2012)