Line contact hand-held scanning device and method having a light path substantially perpendicular to the orientation of the object at a line portion

摘要

The present invention is directed to a hand-held scanning device which contacts an object to be scanned only at substantially colinear points, e.g., via a roller. This configuration allows the scanning device to scan very close to the edge of an object to be scanned while remaining fully supported by the object. In order to counteract detrimental effects caused by tilting of the scanning device during a scan, the scan region of the scanning device is located close to the roller, a relatively high f-number lens is used and a widened illumination area is employed. The scanning device is also configured to provide for easy grasping by a user and to allow the user to view the scan region during a scan.