Illumination system
US7499218B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Aug 31, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system including at least one first light source, a prism and a light uniforming device is provided. The first light source is capable of providing a first beam. The prism is disposed on a transmission path of the first beam, and has four first facets. Two of the first facets are opposite to each other, and the other two first facets are opposite to each other. The first beam passes through one of the first facets and is totally internally reflected by another first facet opposite to the one of the first facets. The light uniforming device is disposed on the transmission path of the first beam from the another first facet. The cost of the illumination system is lower, and the illumination system has high flexibility of the light source design and can provide illumination with high brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.