Omnidirectional laser scanning bar code symbol reader generating a laser scanning pattern with a highly non-uniform scan density with respect to line orientation
US8523076B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2012 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Jan 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1096
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved laser scanning system is provided employing multiple off-center lasers and an irregular multi-sided scanning polygon, producing a laser scanning raster over a total sweep of approximately 180 degrees of polygon rotation (i.e. sweep), wherein the scanning region includes (i) a center scanning region with a first plurality of scanning lines, (ii) two mid scanning regions with a second plurality of scanning lines, and (iii) far left and right scanning regions each having a third plurality of scanning lines, to supports high (full) density, mid (⅔) density, and low (⅓) density scanning over the 180 degrees scanning region, for robust omni-directional scanning performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.