title: Comment on "Quality of paraxial electromagnetic beams".
abstract: We comment on a recent paper by Seshadri [Appl. Opt.45, 5335 (2006)]APOPAI0003-693510.1364/AO.45.005335. In the cited work the author utilized the so-named Felsen method in order to derive the full wave expression of a scalar Bessel-Gauss field, propagating in free space, originated from an assigned input distribution on the source plane z = 0. As we show, the author's obtained results do not correctly reproduce the aforesaid input field distribution, as, on the contrary, they have to do.
authors.affiliation: ing.elgawhary@hotmail.it
authors.forename: Omar
authors.initials: O
authors.lastname: El Gawhary
authors.forename: Sergio
authors.initials: S
authors.lastname: Severini