Device for preventing image quality reduction caused by incidental light
US7489424B2 · kind B2 · utility
0Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2003 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Jun 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading device is provided with a guide member having a light-blocking portion with its upper surface positioned above an extended surface of a reading surface of an optical reader. The device is also provided with a slant surface between the reading surface of the optical reader and the light-blocking portion. The device is further provided with upper guide surfaces facing the light-blocking portion and the slant surface respectively, at a predetermined distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.