Ray tracing through a toric refracting surface.
A procedure has been developed for tracing a ray through a toric refracting surface. The surface is defined in terms of a rectangular coordinate system. The ray is specified by the rectangular coordinates of a point through which it passes and its direction-cosines.
D007909:Lenses; D008027:Light; D008433:Mathematics; D055095:Optics and Photonics