Bar-code reader
US5880450A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Mar 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1098
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bar code reader includes a laser source for emitting a laser beam, and a scan device for scanning a bar code with the laser beam according to a predetermined scanning pattern. A window passes the laser beam from the scanning device toward the bar code which is in the vicinity of the window. A condenser condenses reflected light return from the bar code through the window and scanning device along the route traced by the laser beam. A photosensor detects the condense light and provides an electric signal which is proportional to the intensity of the detected light. A main body accommodates the laser source, the scanning device, the window, the condenser, and the photosensor. A cover is attached to the main body, and has an opening corresponding to the window. A buzzer is provided, to create a buzzing sound which resonates in a space formed between the main body and the cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.