Hand-held optical character recognition wand with visual aligner
US4240748A · kind A · utility
28Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1978 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Jun 26, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/142
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hand-held optical reading device, commonly called a wand, for reading a field of printed characters. The wand includes a light source for illuminating the printed characters, a photodiode array and a lens for collecting reflected light and forming an image on the diode array corresponding to the printed characters. Apertures are formed in the lower portion of the wand housing for projecting light from the light source onto the surface upon which the characters are printed. The projected light forms a pattern on the surface which is used for visually aligning the wand with respect to character field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.