title: Focusing of laser beams by a sequence of irises.
abstract: The properties of diffraction focusing systems composed of a series of irises, coaxially distributed along a laser beam, are analyzed. Based on diffracted-ray methods, complete design equations and optimization procedures are given. Focusing experiments on a He-Ne laser beam are reported with two types of focusing structures, and the results are found to agree completely with the theoretical predictions.
authors.forename: G
authors.initials: G
authors.lastname: Otis
authors.forename: J L
authors.initials: JL
authors.lastname: Lachambre
authors.forename: P
authors.initials: P
authors.lastname: Lavigne