title: Interferometric measurement of angles.
abstract: A new interferometric device for measuring small angles or rotations with high accuracy is described. This instrument works by counting fringes formed by the rotation of a flat-parallel plate of glass illuminated with a collimated beam from a gas laser. Some possible applications are given.
authors.forename: D
authors.initials: D
authors.lastname: Malacara
authors.forename: O
authors.initials: O
authors.lastname: Harris