title: Optical grating evaluator: a device for detailed measurement of diffraction grating efficiencies in the vacuum ultraviolet.
abstract: A device for detailed measurement of diffraction grating efficiencies and over-all performance in the VUV has been designed and constructed at the Naval Research Laboratory. The system employs semiautomated mechanisms to scan the face of the grating with a narrow monochromatic beam, and an efficiency map of the grating surface is produced on a strip chart recorder. Grating efficiency in the various diffracted orders and intensity of light scattered between orders may also be measured. A unique feature is the ability to determine the angle and effectiveness of grating blaze and variations in blaze under different conditions of illumination.
authors.forename: D J
authors.initials: DJ
authors.lastname: Michels
authors.forename: T L
authors.initials: TL
authors.lastname: Mikes
authors.forename: W R
authors.initials: WR
authors.lastname: Hunter