Scanning devices and methods using surface emitting laser diodes
US7428995B1 · kind B1 · utility
10Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Sep 30, 2008 |
| Priority date | — |
| Expiry date | Feb 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10742
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bar code scanning device, system and method that utilizes one or more vertical cavity surface emitting laser diodes for producing at least one laser beam, where the vertical cavity surface emitting laser diodes are disposed on a substrate, and wherein the produced laser beam is substantially an essential single spatial mode laser beam. The bar code scanning device, system and method of present invention also comprise a photodiode attached to the substrate and arranged to receive at least a portion of the beam of light reflected off the scanned bar code or symbol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.