title: Radial gradient-index lenses with zero Petzval aberration.
abstract: Lenses with radial gradients can exhibit zero Petzval curvature of field. This class of lens is examined in terms of its other third-order aberrations.
authors.forename: D T
authors.initials: DT
authors.lastname: Moore
authors.forename: R T
authors.initials: RT
authors.lastname: Salvage