Apparatus and method of using light sources of differing wavelengths in an unitized beam
US7083304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2004 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Aug 12, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A plurality of light sources, each radiating a color of light; a corresponding plurality of reflectors are arranged and configured so that the reflector reflects light from a predetermined one of the plurality of light sources. The reflected light from the plurality of reflectors is mixed to generate a composite light from the plurality of light sources. A sequenced or stacked array of the light sources and dichroic reflectors mixes the reflected light from the reflectors. Each reflector is positioned on a common optical axis with an aligned corresponding one of the plurality of light sources to provide a light source and reflector pair. Each reflector is coated with a dichroic filter material which reflects the color of light radiated by the corresponding light source of the pair, and which transmits light radiated by all preceding light sources in the sequenced array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.