title: Ray-tracing formulas for refraction and internal reflection in uniaxial crystals.
abstract: Formulas for the calculation of the direction cosines of refracted and internally reflected rays in anisotropic uniaxial crystals are presented. The method is based on a transformation to a nonorthonormal coordinate system in which the normal surface associated with the extraordinary ray is of spherical shape. A numerical example for the case of refraction and internal reflection in calcite is given.
authors.forename: G
authors.initials: G
authors.lastname: Beyerle
authors.forename: I S
authors.initials: IS
authors.lastname: McDermid