Three line scanner for bar code symbols
US3988573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Jun 9, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10871
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical scanner is disclosed for reading of optical bar codes of the type used for point-of-sale data acquisition. The optical scanner provides a 3-line scan pattern adapted for omnidirectional reading of a bar code symbol. Beam deflection means in the path of a single light beam is operative to deflect the beam about a deflection axis and to tilt the deflection axis from one deflection plane to another after each beam deflection thereby producing three trace segments in separate deflection planes. Trace orienting means in each of the deflection planes redirect the beams so that the trace segments are projected into the scanning field to produce 3-line pattern of trace segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.