G. Beyerle et Is. Mcdermid, RAY-TRACING FORMULAS FOR REFRACTION AND INTERNAL-REFLECTION IN UNIAXIAL CRYSTALS, Applied optics, 37(34), 1998, pp. 7947-7953
Formulas for the calculation of the direction cosines of refracted and
internally reflected rays in anisotropic uniaxial crystals are presen
ted. The method is based on a transformation to a nonorthonormal coord
inate system in which the normal surface associated with the extraordi
nary ray is of spherical shape. A numerical example for the case of re
fraction and internal reflection in calcite is given. (C) 1998 Optical
Society of America.