Optical bar code reader
US4143809A · kind A · utility
45Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1977 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Oct 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10881
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical bar code reader is provided employing a dual focusing system in which a source of light is focused by a first lens to a small area of the bar code, which reflects the light back through a second lens to a detector. In preferred embodiments of the invention the source and detector are solid state semiconductors mounted on the same substrate, while the focusing lenses are integrally molded as part of a single lens support. Spherical aberration is minimized by utilizing aspheric lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.