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.
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Citations
46 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A lighting system, for providing variable color lighting for studio or theater applications, the lighting system comprising:
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a first of source of light of a first wavelength; a second source of light of second wavelength, the second wavelength being different from the first wavelength; an optical cavity having a diffusely reflective interior surface for receiving and combining light of the first and second wavelengths from the sources, and having an aperture for allowing emission of combined light of both the first wavelength and the second wavelength; a variable opening iris optically coupled to the aperture of the optical cavity, for controlling an amount of the combined light emitted toward a subject to be illuminated; and control circuitry coupled to the first and second sources for establishing intensity of light from the sources, so as to set a spectral characteristic of the combined light directed toward the subject to be illuminated in the studio or theater. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A lighting fixture, for a luminous lighting application, the fixture comprising:
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a first of source of light of a first wavelength; a second source of light of second wavelength, the second wavelength being different from the first wavelength; an optical cavity having a diffusely reflective interior surface for receiving and combining light of the first and second wavelengths from the sources, and having an aperture for allowing emission of combined light of both the first wavelength and the second wavelength; and at least one optical processing element coupled to the aperture of the optical cavity, for processing the combined light in a manner facilitating the luminous lighting application. - View Dependent Claims (34, 35, 36, 37)
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38. A method of illuminating a subject, comprising:
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generating a variable amount of light of a first wavelength and a variable amount of light of a second wavelength, wherein the second wavelength is different from the first wavelength; optically combining the light of the first wavelength with the light of the second wavelength; illuminating the subject with the combined light; adjusting the amount of the light of the first wavelength or the amount of the light of the second wavelength, to achieve a color characteristic of a desired illumination of the subject with the combined light; recording the amount of the light of the first wavelength and the amount of the light of the second wavelength contained in the combined light used to achieve the desired illumination of the subject; setting a lighting system to generate the recorded amount of the light of the first wavelength and to generate the recorded amount of the light of the second wavelength; operating the lighting system to generate the set recorded amounts of light of the first and second wavelengths; optically combining the light of the first and second wavelengths generated by the lighting system to produce a combined light output corresponding to the desired illumination; and irradiating the subject with the combined light output from the lighting system, to achieve the desired illumination of the subject using the lighting system. - View Dependent Claims (39, 40, 41, 42)
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43. A method of illuminating a subject with light of a desired color characteristic, comprising:
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setting a first amount for light of a first wavelength; generating light of the first wavelength from a first source, in a first intensity corresponding to the first set amount; setting a second amount for light of a second wavelength; generating light of the second wavelength from a second source, in a second intensity corresponding to the second set amount;
wherein the second wavelength is different from the first wavelength, and the first and second set amounts correspond to the desired color characteristic for the illumination of the subject;diffusely reflecting the generated light of the first and second wavelengths from the first and second sources within a cavity, to produce combined light containing amounts of light of the first and second wavelengths in proportion to the first and second set amounts; and emitting at least a portion of the combined light through an aperture of the cavity to illuminate the subject with light of the desired color characteristic. - View Dependent Claims (44, 45, 46)
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Specification