Optical signal processor for barcode reader
US5239169A · kind A · utility
43Cited by
10References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 1991 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10702
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bar code reader having a scanned light and a stationary photodetector is disclosed. The photo detector uses a lens having a pyramidal frusta-like body to concentrate light. The input side has a pair of oppositely angles side planes facing opposite extremities of a scanned label. The faces can be used to mount filters to reject ambient light, and a polarizer can be used to reject specular reflection from the scanning laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.