An image sensor system having very long Depth Of Focus (DOF) on the document plane and very short optical distance from the document plane to the image plane provides the advantages of both a lens reduction image sensor system and a contact type image sensor system. The inventive image sensor system...http://www.google.de/patents/US6111244?utm_source=gb-gplus-sharePatent US6111244 - Long depth of focus contact image sensor (LF-CIS) module for compact and light weight flatbed type scanning system
