Scanning system for copier

Details Scanning system for copier Scanning system for copier

G - Physics

03

G

314/28

G03G 15/00 (2006.01) G03B 27/52 (2006.01)

Patent

CA 1189130

ABSTRACT OF THE DISCLOSURE An optical system for a copying device is disclosed which scans a document lying in an object plane by means of a pivoting mirror and projects an image of the document onto the surface of a photoreceptor drum. By rotating the projection lens while simultaneously moving an aperture slit in a direction of movement opposite to the movement of the drum, a condition is constantly maintained wherein the object plane, lens plane and image plane are maintained parallel thereby eliminating field tilt. With this configuration, the image is also precessed onto the drum providing a precession distance which can be used to relax constraints normally imposed by scan return conditions.

403985

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