title: Two-Element Refracting System for Annular Gaussian-to-Bessel Beam Transformation.
abstract: A refracting system consisting of two lenses is designed to transform an annular Gaussian laser beam into a circular Bessel beam. The slopes of the input and output surfaces fit well with a sixth-order polynomial. A smooth variation of the radii of curvature of the resulting aspheric surfaces is very attractive for easy machining of the surfaces. The diffraction-free length for the designed system is 59.4735 m at 633 nm.
authors.forename: M
authors.initials: M
authors.lastname: Arif
authors.forename: M M
authors.initials: MM
authors.lastname: Hossain
authors.forename: A A
authors.initials: AA
authors.lastname: Awwal
authors.forename: M N
authors.initials: MN
authors.lastname: Islam