title: An improvement in Fabry-Perot spectrometry.
abstract: In Fabry-Perot interferometry a large fraction of light can be reflected by the etalon; thus, it is lost for spectroscopic purposes. The present article shows the possibility of recovering this light, collecting it by means of reflectors and sending it back to the etalon under a different angle. Some devices are examined and some experimental proofs of the device are reported. The gain achieved is of the order of five.
authors.affiliation: Laboratori Gas Ionizzati, Association EURATOM-CERN, Casella Postale 65, Frascati, Roma, Italy.
authors.forename: U
authors.initials: U
authors.lastname: Ascoli-Bartoli
authors.forename: G
authors.initials: G
authors.lastname: Benedetti-Michelangeli
authors.forename: F
authors.initials: F
authors.lastname: Demarco