Optical integrating chamber lighting using multiple color...

Details Optical integrating chamber lighting using multiple color... Optical integrating chamber lighting using multiple color...

H - Electricity

05

B

H05B 37/02 (2006.01) F21V 7/04 (2006.01) H05B 33/02 (2006.01) H05B 33/08 (2006.01) F21S 8/02 (2006.01)

Patent

CA 2680501

A lighting apparatus, for a white light illuminating type application, to illuminate or to provide task or object illumination in a region or area intended to be occupied by a person. The lighting apparatus having a chamber with a diffusely reflective interior surface for combining at least some light by diffuse reflection within the chamber and having an optical passage for allowing emission of combined light from the chamber in a direction to facilitate the white light illuminating type application; a first source for producing substantially white light, the first source being coupled to supply the substantially white light to the interior of the chamber; and a second source for producing light of a defined wavelength, the second source being coupled to supply the light of the defined wavelength to the interior of the chamber, so that the emission of combined light from the chamber is white light of a spectral characteristic determined by a combination of the substantially white light and the light of the defined wavelength. The lighting apparatus also includes a control circuit coupled to the sources for establishing output intensity of light of each of the sources to set contributions of the substantially white light and the light of the defined wavelength to the combined light and thus set the spectral characteristic of the combined white light emitted through the optical passage of the chamber.

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