title: Sky input horn for a far-infrared interferometer.
abstract: A unique optical design consisting of a compound parabolic concentrator and an elliptical concentrator joined at their throats is discussed. The optic has a number of advantages over conventional infrared telescopes for applications in interferometry and photometry. Ray-tracing results are presented.
authors.forename: M S
authors.initials: MS
authors.lastname: Miller
authors.forename: W L
authors.initials: WL
authors.lastname: Eichhorn
authors.forename: J C
authors.initials: JC
authors.lastname: Mather