Xerox Corporation

Abbott Smith

James D Rees

David Alan Bartman

Vance J Carpenter

Gilbert Aser, Deceased

An imaging system in a copier is modified so as to scan original documents at speeds differing from the image medium speed through the exposure zone so as to anamorphically reduce or enlarge the projected image. A two process scanning operation results in an output image reduced or enlarged in two dimensions. Resolution is maintained by forming an effective imaging width of approximately 1 mm by using a combination of a lens array providing a narrow irradiance profile with an optically aligned slit of smaller width. Magnification values of from 0.50 to 1.5 are thereby enabled.

Document imaging system with bi-directional anamorphic magnification

An imaging system is provided for scanning stationary objects in an object plane and projecting the image onto a moving flat photoreceptor in such a manner that the image moves in a direction opposite the photoreceptor movement. In a preferred embodiment, the scanning illumination elements comprise a modified dual rate mirror system where the second mirror is moving at less than 1/2 the speed of the scan mirror thereby causing a resultant increase in platen-to-lens distance. This increase is compensated for, and image precession obtained, by moving the lens and mirror assembly along the optical axis in a direction opposed to that of the photoreceptor.

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Webster, NY, United States of America

Abbott Smith