Line contact hand-held scanning device and method having a light path substantially perpendicular to the orientation of the object at a line portion
US5723859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jan 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.