Compact color illumination device
US7220021B2 · kind B2 · utility
8Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2004 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Jul 31, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a compact color illumination device (100) for emitting collimated light. The illumination device comprises a reflector cup (102), a blazed diffraction grating (108) formed on the inner surface of the reflector cup, and a plurality of light emitting sources (110) positioned linearly in a focal plane of the reflector cup. Each light emitting source emits a different color of light that is incident on the blazed diffraction grating. The light emitted by the light emitting sources is reflected by the blazed diffraction grating, wherein the reflected light is collimated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.