Camera flash with reconfigurable emission spectrum
First Claim
1. A method for producing an output spectrum of a flash unit, comprising:
- combining a plurality of emissive light sources for providing a combined output beam; and
producing the output spectrum for the combined output beam at least partially based on a reference spectrum.
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Abstract
A method and an apparatus for spectrum synthesis for use in a flash unit, wherein the spectrum synthesis includes combining a plurality of emissive light sources in order to provide a combine output beam and producing the output spectrum for the combined output beam at least based on a reference spectrum. The reference spectrum can be obtained by sensing the spectrum of ambient light or selected from a plurality of stored spectra. The flash unit has at least two emissive light sources and each of the light sources can be adjusted relative to each other so that the outputs from the light sources can mimic a selected illumination scenario. It is possible to use a mixture of quantum dots to tailor each light source so that the combined spectra from different light sources can reasonably mimic a number of frequently used illumination scenario.
45 Citations
20 Claims
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1. A method for producing an output spectrum of a flash unit, comprising:
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combining a plurality of emissive light sources for providing a combined output beam; and producing the output spectrum for the combined output beam at least partially based on a reference spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A flash unit for use in a camera, comprising:
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a plurality of emissive light sources for providing a combined output beam; and a power receiver for receiving electric current to power each of the plurality of emissive light sources, wherein the electric current to power at least some of the plurality of emissive light sources is adjustable so as to produce an output spectrum for the combined output beam at least partially based on a reference spectrum. - View Dependent Claims (10)
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11. An apparatus, comprising:
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a connector for receiving a flash unit, wherein the flash unit comprises a plurality of emissive light sources arranged to receive electric current for producing a combined light output; a processor configured to adjust the electric current so as to produce an output spectrum of the combined light output at least based on a reference spectrum. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification