title: Simple ray tracing formulas for uniaxial optical crystals.
abstract: A method for ray tracing in uniaxial crystals is presented. General formulas for the direction of extraordinary rays are obtained. The method used in this paper is simpler than the general method based on Huygens's construction, and its physical picture is clearer.
authors.forename: Q T
authors.initials: QT
authors.lastname: Liang