An image input terminal (IIT) with automatic document handler for feeding documents to be scanned into registered position on the IIT platen. The IIT includes a pair of multi-element scanning arrays with cooperating scan lamp and optics on a movable carriage disposed in scanning relationship with the...http://www.google.fr/patents/US4314281?utm_source=gb-gplus-shareBrevet US4314281 - Shading compensation for scanning apparatus
