Optical information reader and illuminating method
US9378402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2014 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Oct 9, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10831
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A barcode reader, as an optical information reader which reads information indicated with a symbol having a light reflectance different from an ambient light reflectance, is provided with a linear sensor as a light receiving sensor, an image pickup lens to image-form light on the linear sensor, an LED as a light emitting device, a projection lens to project light emitted from the LED, a parting portion to regulate a light projection range of the light emitted from the LED, having a first opening and a second opening to shield light out of a predetermined range, a central position of the predetermined range being shifted from position of an optical axis of the projection lens to a side of an optical axis of the image pickup lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.