title: Edge-enhanced imaging with polyvinyl alcohol/acrylamide photopolymer gratings.
abstract: We demonstrate edge-enhanced imaging produced by volume phase gratings recorded on a polyvinyl alcohol/acrylamide photopolymer. Bragg diffraction, exhibited by volume gratings, modifies the impulse response of the imaging system, facilitating spatial filtering operations with no need for a physical Fourier plane. We demonstrate that Kogelnik's coupled-wave theory can be used to calculate the transfer function for the transmitted and the diffracted orders. The experimental and simulated results agree, and they demonstrate the feasibility of our proposal.
authors.affiliation: Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain. amarquez@dfists.ua.es
authors.forename: Andrés
authors.initials: A
authors.lastname: Márquez
authors.forename: Cristian
authors.initials: C
authors.lastname: Neipp
authors.forename: Augusto
authors.initials: A
authors.lastname: Beléndez
authors.forename: Sergi
authors.initials: S
authors.lastname: Gallego
authors.forename: Manuel
authors.initials: M
authors.lastname: Ortuño
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Pascual