title: Two-frame algorithm to design quadrature filters in phase shifting interferometry.
abstract: The main purpose of this paper is to present a method to design tunable quadrature filters in phase shifting interferometry. From a general tunable two-frame algorithm introduced, a set of individual filters corresponding to each quadrature conditions of the filter is obtained. Then, through a convolution algorithm of this set of filters the desired symmetric quadrature filter is recovered. Finally, the method is applied to obtain several tunable filters, like four and five-frame algorithms.
authors.affiliation: Universidad Tecnológica de León, Blvd. Universidad Tecnológica # 225 San Carlos, León, Gto. 37670, México. jfmosino@gmail.com
authors.forename: J F
authors.initials: JF
authors.lastname: Mosiño
authors.forename: J C
authors.initials: JC
authors.lastname: Gutiérrez-García
authors.forename: T A
authors.initials: TA
authors.lastname: Gutiérrez-García
authors.forename: J M
authors.initials: JM
authors.lastname: Macías-Preza