Scanning system

Abstract

Briefly, the present invention is concerned with a low inertia scanning system for projecting an image of a stationary object on a flat platen onto a rotating photoreceptor drum. An aperture plate located adjacent the photoreceptor drum moves in a direction opposite the direction of the drum. A carriage disposed between a stationary lens and the photoreceptor drum supports a pair of mirrors. The light image is projected from the lens to one of the pair of mirrors for reflection to the second mirror rotating about a pivot point to scan the image through the aperture onto the photoreceptor drum. During scanning of the platen, the carriage moves in a linear direction toward and away from the photoreceptor drum and together with the rotation of the second mirror maintains a constant magnification ratio. A second pair of mirrors disposed between the platen and the lens is adapted for movement in a linear direction with respect to the flat platen to predetermined positions in cooperation with the shifting of the lens to provide a properly focused light image in a different magnification range.

Dependencies are inferred from the claim text.