title: Diffraction grating ruling in australia.
abstract: An Australian ruling engine has been operating at the Division of Chemical Physics, CSIRO, Melbourne, since January 1960, construction having commenced in March 1958. The engine, which has a capacity of 14 cm x 18 cm, has now ruled approximately 250 gratings which show efficiencies of 60-80%, Rowland ghost intensities of approximately 0.01% of the parent line (638/mm,first order), and first order wavefronts within one-fifth of a fringe, over a ruled width of 15 cm. Ruling speed is 19 grooves/min. No servomechanism or period corrector is used.
authors.forename: D A
authors.initials: DA
authors.lastname: Davies
authors.forename: G M
authors.initials: GM
authors.lastname: Stiff