title: Spatial filter for increasing the depth of focus.
abstract: The Strehl ratio, in the form of McCutchen's theorem, is employed to design a spatial filter that increases the depth of focus. Computer-simulated images show the increment in focal depth.
authors.forename: J
authors.initials: J
authors.lastname: Ojeda-Castañeda
authors.forename: L R
authors.initials: LR
authors.lastname: Berriel-Valdos
authors.forename: E
authors.initials: E
authors.lastname: Montes