title: Versatile high-precision multiple-pass reflectometer.
abstract: A confocal mirror assembly is used to measure radiant reflectances in excess of 0.99 with high precision. The mirrors can be either plano or curved with a few diopters of power, and the angle of incidence can vary from 5 degrees to 70 degrees . Multilayer dielectric reflectors consisting of alternate layers of tantalum pentoxide and silica were prepared by evaporation in a vacuum. A maximum reflectance of 0.9996 +/- 0.0002 was measured at 520 nm.
authors.forename: O
authors.initials: O
authors.lastname: Arnon
authors.forename: P
authors.initials: P
authors.lastname: Baumeister