title: Asymptotic focusing properties of a sinusoidal phase grating.
abstract: The lensing behavior of sinusoidal phase gratings is studied in the limit of large phase amplitudes phi. The resulting asymptotic expressions are compared with the exact results and are shown to represent excellent approximations even for moderate values of phi. They are well suited to a quantitative description of focusing imperfections caused by the strong spherical aberrations encountered in this type of microlens array.
authors.affiliation: Instituto de Física, Universidade Federal do Rio de Janeiro, 21941-972 Rio de Janeiro, Brazil. bernd@if.ufrj.br
authors.forename: Bernd
authors.initials: B
authors.lastname: Rohwedder
authors.forename: Pablo
authors.initials: P
authors.lastname: Barberis-Blostein