Document illuminator
US7755811B2 · kind B2 · utility
7Cited by
8References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2005 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | May 13, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A document illuminator includes a light-transmissive element having an embedded source of illumination fitted in a cavity formed therein. The light-transmissive element preferably has one or more optical notches and preferably is encased in an opaque surround to promote total internal reflection of the light rays emanating from the LED. The one or more optical notches may include a dual-V notch or an elliptical notch. The reflected light rays are collected at an aperture which in turn transmit light at high power and highly uniform illumination profile to illuminate a document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.