title: Angle eikonals for a perfect zoom system.
abstract: I show that it is possible to choose the eikonals for the lens groups of a zoom lens such that extended objects at infinity are imaged perfectly, without any aberrations, at all zoom settings.
authors.affiliation: Department of Physics, Worcester Polytechnic Institute, Massachusetts 01609, USA.
authors.forename: A
authors.initials: A
authors.lastname: Walther