Hand-held optical character reader with means for instantaneously reading information from a predetermined area at an optical sensing area
US5019699A · kind A · utility
348Cited by
12References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/147
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a preferred arrangement, a lens system having circular symmetry in the hand-held reader focuses the entire width of area information onto an area photosensor array with a single flash of a ring-type xenon flash tube which surrounds the lens system and is symmetrically disposed relative to the axis of the lens system. In this way, the area information image can be disposed at any angle relative to the photosensor array, and the sensed information as stored in digital form can be rotated to a desired orientation prior to decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.