title: Background suppression in double-beam interferometry.
abstract: An optical background suppression technique is described in which the lower spatial frequencies of a background field are effectively suppressed, thereby enhancing the detectability of localized sources. The technique is particularly applicable for use in image-forming double-beam interferometers in which the individual detector elements are matched to the diffraction-limited resolution of the instrument. The technique uses pairs of optical systems whose modulation transfer functions are suitably matched, and a number of these pairs are described.
authors.forename: T F
authors.initials: TF
authors.lastname: Zehnpfennig
authors.forename: O
authors.initials: O
authors.lastname: Shepherd
authors.forename: S
authors.initials: S
authors.lastname: Rappaport
authors.forename: W P
authors.initials: WP
authors.lastname: Reidy
authors.forename: G
authors.initials: G
authors.lastname: Vanasse