title: Optically produced linear zone plates.
abstract: Linear zone plates (LZP) have been constructed using optical methods both in amplitude and in phase. The results obtained confirm that focal distances follow the relation f/n, and the focal number and its diffraction efficiencies increase by transforming a LZP from amplitude to phase.
authors.forename: C
authors.initials: C
authors.lastname: Gomez-Reino
authors.forename: J M
authors.initials: JM
authors.lastname: Cuadrado
authors.forename: M V
authors.initials: MV
authors.lastname: Martin