title: An image-scanning three-beam photoelectric photometer for astronomical observations.
abstract: A high-speed focal-plane image scanning system is described. With such a system an astronomical image can be linearly scanned without moving either telescope or detector, and without defocusing. The application of the scanning system, used in conjunction with a three-beam photoelectric photometer, to lunar research is discussed briefly.
authors.affiliation: Department of Astronomy, Universityof Manchester, Manchester 13, England.
authors.forename: G L
authors.initials: GL
authors.lastname: Roberts