Motion tolerant bar code reader
US8556179B2 · kind B2 · utility
6Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2011 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Aug 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A 2D bar code reader with improved motion tolerance is presented. The 2D bar code reader includes a lens configuration that enhances chromatic aberration to separate the focal planes on which bar code images from two different color components of a light will be focused. An imager interprets one of the focal planes as the image and the other one as noise to be ignored. In addition, the increased depth of field generated by the chromatic aberration allows for a larger aperture stop setting and quicker shutter speed, thereby improving motion tolerance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.