title: Fraunhofer diffraction patterns from uniformly illuminated square output apertures with noncentered square obscurations.
abstract: Theoretical Fraunhofer diffraction patterns are presented for uniformly illuminated square apertures with noncentered square obscurations. The energy within a given subtended solid angle in the far field is calculated. It is shown that the cornered-off-axis obscuration provides much more far-field energy in a given spot size than the centered obscuration for the same clear aperture area and total energy, for example, 82% more far-field energy in the first Airy square for 50% obscuration, thus providing superior performance for practical systems.
authors.forename: G W
authors.initials: GW
authors.lastname: Sutton
authors.forename: M M
authors.initials: MM
authors.lastname: Weiner
authors.forename: S A
authors.initials: SA
authors.lastname: Mani