Information reader for optically reading code on object
US7871003B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2007 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Jul 16, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10574
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An information reader has blocks of bright field illuminating units illuminating an information code directly marked on an object with first lights to regularly reflect the lights on the code, blocks of dark field illuminating units illuminating the code with second lights to irregularly reflect the lights on the code, an optical system, and a control section lighting the blocks of bright and dark field illuminating units by turns or simultaneously. The optical system forms an image of the code from each of the first and second lights or a combination of the first and second lights reflected on the code and reads the code from the images. The first lights are transmitted along an optical axis of the optical system. The second lights are transmitted toward the optical axis while slightly shifted toward the code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.