title: Focusing cam design for normal incidence VUV monochromators.
abstract: The design of a focusing cam suitable for use in McPherson-type normal incidence VUV scanning monochromators is described. An approximate analytic procedure is given which enables the rapid calculation of cam shape to a sufficient accuracy to maintain an accurate focus over the operational wavelength range of such monochromators.
authors.forename: B R
authors.initials: BR
authors.lastname: Lewis