Document illuminator with surface lens
US7760434B2 · kind B2 · utility
1Cited by
2References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2006 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | May 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02895
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning apparatus includes an illuminator for illuminating a portion of a document to be scanned. The illuminator includes an array of discrete light sources and an optical element. The optical element includes a light-transmissive material and defines a focusing portion and an angular modification portion. The angular modification portion tends to reduce specular flare by modifying the angular distribution of light from the light sources which are within the acceptance angle of a lens arrangement which focuses light from the document onto a sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.