Lighting system enabling combination of several light beams
US7505205B2 · kind B2 · utility
3Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2004 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Aug 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/143
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to an illumination system for combining two light beams. A prism bounded by two entrance faces that form a dihedron. An integrator is coupled to an exit face (20.3) of the prism. Each beam penetrates the prism via one of the entrance faces and is reflected by internal reflection on the other entrance face toward the exit face. These beams are substantially focused onto the entrance face of the integrator in such a way that the latter delivers an almost uniform exit beam. Applications: Projection and backprojection apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.