An apparatus for the optical recognition of documents (1) extends over the entire width of a transfer plane (3). Regularly disposed photoelectric elements (4), whose optical axes create a single sensor plane (5) that is perpendicular to transfer plane (3), receive light (7) as altered by document (1)....http://www.google.co.uk/patents/US5304813?utm_source=gb-gplus-sharePatent US5304813 - Apparatus for the optical recognition of documents
