Document illuminator with stepped optical element
US7467879B2 · kind B2 · utility
12Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2006 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Jul 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02885
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for scanning a document comprises a platen for supporting at least a portion of the document; a light source; and an optical element for directing light from the light source to the platen. The optical element defines a plurality of small planar surfaces, the small planar surfaces being arranged in a linear array. Light emanating from a source is reflected from one of the small planar surfaces and emerges substantially perpendicular to an exit surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.