title: Phase-shifting point-diffraction interferometer developed by using the electro-optic effect in ferroelectric crystals.
abstract: A novel and simple phase-shifting point-diffraction interferometer using a z-cut lithium niobate wafer is proposed. The pinhole is realized by an optical lithography process, aluminum deposition, and subsequent lift-off on the surface of the wafer. The phase shifting is obtained by inducing the electro-optic effect along the z crystal axis. We demonstrate experimentally the possibility of retrieving an aberrated wavefront.
authors.affiliation: Istituto Nazionale di Ottica Applicata del CNR and LENS-European Laboratory for Nonlinear Spectroscopy, Pozzuoli, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Paturzo
authors.forename: F
authors.initials: F
authors.lastname: Pignatiello
authors.forename: S
authors.initials: S
authors.lastname: Grilli
authors.forename: S
authors.initials: S
authors.lastname: De Nicola
authors.forename: P
authors.initials: P
authors.lastname: Ferraro