Optical integrating chamber lighting using multiple color sources
First Claim
1. An apparatus for emitting radiant energy, comprising:
- a first of source of radiant energy of a first wavelength;
a second source of radiant energy of a second wavelength, the second wavelength being different from the first wavelength;
an optical cavity having a diffusely reflective interior surface for receiving and combining radiant energy of the first and second wavelengths from the sources of radiant energy, and having an aperture for allowing emission of combined radiant energy containing both radiant energy of the first wavelength and radiant energy of the second wavelength; and
an optical processing element coupled to the aperture of the optical cavity.
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Accused Products
Abstract
A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination of light) uses an optical integrating cavity to combine energy of different wavelengths from different sources. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the cavity. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture. A variety of different elements may optically process the combined light output, such a deflector, a variable iris, a lens, a variable focusing lens system, a collimator, a holographic diffuser and combinations thereof. Such systems are useful in various luminous applications as well as various illumination applications.
121 Citations
2 Claims
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1. An apparatus for emitting radiant energy, comprising:
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a first of source of radiant energy of a first wavelength;
a second source of radiant energy of a second wavelength, the second wavelength being different from the first wavelength;
an optical cavity having a diffusely reflective interior surface for receiving and combining radiant energy of the first and second wavelengths from the sources of radiant energy, and having an aperture for allowing emission of combined radiant energy containing both radiant energy of the first wavelength and radiant energy of the second wavelength; and
an optical processing element coupled to the aperture of the optical cavity.
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2-46. -46. (canceled)
Specification