Compact optical scanning system.

摘要

A compact scan document system is enabled by adding motion to the scanning and projection components used in a foided optical system. A general and preferred velocity relationship is set for the system optical elements and a mechanical drive arrangement is disclosed which enables the specific ratios required.

In a preferred embodiment, a pulley/belt system is used to provide four velocities such that a document (10) is scanned by a first mirror (20) moving at a first velocity V, the document image is reflected to a folding mirror arrangement (26) traveling at .75V and projected by a lens (32) moving at .5V to a photoreceptor image plane (42) via another folding mirror arrangement (34) moving at .25V.