title: Optical vortex coronagraph.
abstract: We describe a method to observe dim exoplanets that eliminates light from the parent star across the entire exit pupil without sacrificing light from the planet by use of a vortex mask of topological charge m = 2.
authors.affiliation: College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA.
authors.forename: Gregory
authors.initials: G
authors.lastname: Foo
authors.forename: David M
authors.initials: DM
authors.lastname: Palacios
authors.forename: Grover A
authors.initials: GA
authors.lastname: Swartzlander