title: Local foci of a parabolic binary diffraction lens.
abstract: The intensity distribution on the optical axis of a parabolic binary diffraction lens is theoretically and experimentally studied. The binary diffraction lens is shown to form an array of focal spots of near-equal intensity on the optical axis. In each local focus, the focal-spot size decreases as the square of the focus number until the paraxiality condition is broken. Theory and experiment are shown to be in good agreement.
authors.forename: Svetlana N
authors.initials: SN
authors.lastname: Khonina
authors.forename: Andrey V
authors.initials: AV
authors.lastname: Ustinov
authors.forename: Roman V
authors.initials: RV
authors.lastname: Skidanov
authors.forename: Alexey P
authors.initials: AP
authors.lastname: Porfirev