title: Instrument for measuring the roughness of supersmooth surfaces.
abstract: An instrument, based upon a measurement of the relative magnitudes of scattered light from a standard and the test mirror, was built and tested. Although the theory of the data reduction depends upon Gaussian statistics, we have obtained good results even with non-Gaussian surfaces. This paper describes the instrument, its theory, and experimental results.
authors.forename: B P
authors.initials: BP
authors.lastname: Hildebrand
authors.forename: R L
authors.initials: RL
authors.lastname: Gordon
authors.forename: E V
authors.initials: EV
authors.lastname: Allen