Topics in Particle and Dispersion Science

Transmission function in the small-angle approximation for a medium illuminated at normal incidence: Geometry

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Fig. 1. Geometry of radiative transfer by multiple light scattering in a turbid medium (see Single and multiple scattering). Thick arrows indicate photon paths in the medium between scattering events. Small ellipses show locations at which the respective lines "puncture" the turbid medium box. Angle γ' is measured in the incidence plane. Angles γ and θ are measured in the observation plane. These angles are usually referred to in RTE and related equations by using their cosines: κ and µ respectively. The gray arrows show a multiple-scattering path of a photon in the medium. The scattering angle is denoted by θ. The azimuth angles, in a plane parallel to the turbid medium boundary (perpendicular to the line representing the normal), are denoted by φ and φ'. These angles vary each in a range of 0 to 2π, while the observation angle, γ, varies in a range of 0 to π.

CITATION: Kokhanovsky A. A. 2007. Transmission function in the small-angle approximation for a medium illuminated at normal incidence (www.tpdsci.com/Tpc/RTSAANmlTsm.php). In: Top. Part. Disp. Sci. (www.tpdsci.com).

HISTORY: Published: 14-Feb-2007 Modified: 31-Jan-2007 Peer-reviewed: PENDING

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