Projection apparatus with light source to output light into an integrating tunnel through a first and a second medium
US7059726B2 · kind B2 · utility
13Cited by
1References
25Claims
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Key dates
| Filing date | Jul 2, 2004 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Jul 2, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection apparatus that includes a light source optically coupled to an integrating tunnel to output light into the integrating tunnel through a first and a second medium from a direction nonparallel to the output direction of the integrating tunnel. The first and second mediums having different indices of refraction to facilitate reflection of the output light from the light source off a reflective surface of the integrating tunnel and propagating the reflected light substantially towards an output end of the integrating tunnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.