title: Optimal pulse-width modulation for sinusoidal fringe generation with projector defocusing: comment.
abstract: We comment on a recent Letter [Opt. Lett. 35, 4121 (2010)], in which the authors discuss an optimal pulse-width modulation (OPWM) method for sinusoidal fringe generation. We consider that the comparison of the squared binary method (SBM) and the sinusoidal pulse-width modulation (SPWM) method has considerable deficiencies.
authors.affiliation: Instituto de Física, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
authors.forename: Gastón A
authors.initials: GA
authors.lastname: Ayubi
authors.forename: José A
authors.initials: JA
authors.lastname: Ferrari