Light scattering by a spheroid. Relations between ‘spheroidal’ and ‘spherical’ T-matrices

Using the solution of the problem of light scattering by a homogeneous spheroid, derived by separation of variables in spheroidal coordinates, we find the ‘spheroidal’ T -matrix. We suggest a transformation of this matrix into the ‘spherical’ T -matrix useful in applications. The procedure consists of two steps: first, transition from spheroidal to spherical basis, and then from spherical non-orthogonal to orthogonal basis.