hochspannungspulsgenerator for a hochdruckentladungslampe with improved zu00fcndfu00e4higkeit

摘要

Device for optical testing of an essentially rectangular examination zone (3) a mirroring or diffusely reflecting surface (2),• with at least one light source to the bright field illumination, which by means of a telecentric beam path to the examination zone (3) is imaged,• with an electronic camera (11) with a lens (12), which a portion of the surface (2) in the examination zone (3) light emitted by means of a telecentric beam path and the obtained pictures is transmitted to an evaluation device, and• with an electronic control system for controlling the illumination of the examination zone (3) and for controlling the functions of the camera (11),characterized in that the camera - and illumination-side beam path an aspherical field lens (4), the focal length is smaller than twice the maximum extension of the examination zone (3) and the projection surface on the surface to be examined (2) the examination zone (3) covers at least in a straight line, wherein the examination zone (3) by means of a less than 45 degrees to the optical axis..