1999 , Volume 4, Special issue, p.86-99

The formation of the scattered light intensity with varying size, ellipticity, and refractive index of a homogeneous spheroid oriented by the axis of revolution along the incident light direction is studied analytically and numerically. The Wentzel-Kramers-Brillouin approximation is used for relative refractive indices ranging from 1.025 to 1.200. The inverse light scattering problem is solved in the generalized coordinates making use of the ``flight" light scattering indicatrix method. The feasibility of determining the particle size at a distance between indicatrix extrema is considered. The patterns of the formation of the radiation scattered by particles into the solid angle $\theta_0$ (integral light scattering indicatrix F) are obtained in connection with the change in the size, phase shift parameter ($\Delta$) and relative refractive index. The theoretical and numerical investigation reveals that F can be represented as a combination of two mechanisms, i.,e., Fraunhofer diffraction and geometrical optics ($\Delta \geq 3$). The feasibility of determining the relative refractive index of the studied particles has been shown.