title: Active diffraction gratings: development and tests.
abstract: We present the realization and characterization of an active spherical diffraction grating with variable radius of curvature to be used in grazing-incidence monochromators. The device consists of a bimorph deformable mirror on the top of which a diffraction grating with laminar profile is realized by UV lithography. The experimental results show that the active grating can optimize the beam focalization of visible wavelengths through its rotation and focus accommodation.
authors.affiliation: Institute of Photonics and Nanotechnologies, National Council for Research of Italy, via Trasea, 7, Padova 35131, Italy. Stefano.bonora@dei.unipd.it
authors.forename: S
authors.initials: S
authors.lastname: Bonora
authors.forename: F
authors.initials: F
authors.lastname: Frassetto
authors.forename: E
authors.initials: E
authors.lastname: Zanchetta
authors.forename: G
authors.initials: G
authors.lastname: Della Giustina
authors.forename: G
authors.initials: G
authors.lastname: Brusatin
authors.forename: L
authors.initials: L
authors.lastname: Poletto