Imaging system for producing reduced or enlarged images of an original document

US4537499A · kind A · utility

Assignee

• Xerox Corporation · US

Inventors

• Joachim Ritter · Herzogenaurach, DE
• Edward C. Bock · Webster, US
• Richard A. Spinelli · Rochester, US
• John Dennis · Oakland, US

Key dates

• Filing date: Mar 21, 1983
• Grant date: Aug 27, 1985
• Expiry date: Mar 21, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G15/041
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A flash exposure optical imaging system is provided which includes a light housing having a movable top and bottom surface. The top surface contains a document platen, the bottom surface a fixed, wide-angle projection lens. These surfaces are vertically translated past a fixed, central housing wall to vary the system conjugate in response to changes in magnification. In a preferred embodiment, a pair of football shaped cams are rotated in response to position signals from a controller initiated by a magnification change. A pair of T-bars and linkage mechanisms are associated with these cams and their motion provides simultaneous vertical motions to the top and bottom housing surfaces, respectively.