title: Improvements of the ray trace through the generalized Luneburg lens.
abstract: An analytical expression for the gradient of the generalized Luneburg lens is found and applied to the computation of the profile and the gradient of the refractive index.
authors.affiliation: Imperial College, Physics Department, London SW7 2BZ, U.K.
authors.forename: S
authors.initials: S
authors.lastname: Doric
authors.forename: E
authors.initials: E
authors.lastname: Munro