Optical reader
US4471384A · kind A · utility
20Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Jun 25, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/03145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical reader which comprises: at least one yellow LED array as a light source for lighting original material; an optical lens or fibers for guiding the light reflected from the original material; and an image sensor which changes the reflected light to signal waves. In embodiments of the reader, the light source includes both a yellow LED array and a green LED array with colored filters either provided over the LED arrays or on the optical lens or fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.