title: Direct determination of the number of transverse modes of a light beam.
abstract: A method based on moiré deflectometry for direct determination of the number of transverse modes of radiation of a light beam is presented. An expression for the number of transverse modes of a light beam, as a function of the beam divergence, is derived. We demonstrate the method for a Cu-vapor laser-beam analysis.
authors.forename: Z
authors.initials: Z
authors.lastname: Karny
authors.forename: S
authors.initials: S
authors.lastname: Lavi
authors.forename: O
authors.initials: O
authors.lastname: Kafri