LED illuminator
First Claim
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1. An illumination device comprising:
- a first light source configured to emit light at a first wavelength range and a second wavelength range, the first light source comprising;
a light emitting diode configured to emit light at substantially the first wavelength range; and
a wavelength converting material configured to convert the light emitted by the light emitting diode to light at substantially the second wavelength range;
a first dichroic optical element associated with the first light source, the first dichroic optical element configured to pass the light emitted at the second wavelength range and to block the light emitted at the first wavelength range;
a second light source configured to emit light at the first wavelength range; and
a second dichroic optical element disposed in a light path of the first light source and a light path of the second light source, the optical system configured pass light emitted at the second wavelength range and to reflect light emitted at the first wavelength range in order to optically combine light passing through the first dichroic optical element with light emitted from the second light source.
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Abstract
Disclosed is an exemplary illumination device for enhancing the brightness and chromaticity of an illuminator employing light emitting diodes (LED). The illumination device may include a first light source configured to emit light at a first wavelength range. A first dichroic optical element associated with the first light source may be configured to optically block less than the entire wavelength range of the light emitted from the first light source. The illumination device may also include a second light source configured to emit light at second wavelength range substantially corresponding to the wavelength range optically blocked by the first dichroic optical element.
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Citations
13 Claims
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1. An illumination device comprising:
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a first light source configured to emit light at a first wavelength range and a second wavelength range, the first light source comprising; a light emitting diode configured to emit light at substantially the first wavelength range; and a wavelength converting material configured to convert the light emitted by the light emitting diode to light at substantially the second wavelength range; a first dichroic optical element associated with the first light source, the first dichroic optical element configured to pass the light emitted at the second wavelength range and to block the light emitted at the first wavelength range; a second light source configured to emit light at the first wavelength range; and a second dichroic optical element disposed in a light path of the first light source and a light path of the second light source, the optical system configured pass light emitted at the second wavelength range and to reflect light emitted at the first wavelength range in order to optically combine light passing through the first dichroic optical element with light emitted from the second light source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An illumination device comprising:
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a first light source configured to emit a first portion of light in a first wavelength range and a second portion of light in a second wavelength range; a first reflective element optically associated with the first light source, the first reflective element configured to reflect light in the first and second wavelength ranges; a first dichroic element optically associated with the first light source, the first dichroic element configured to block light in the first wavelength range, and to pass light in the second wavelength range; a second light source configured to emit light in the first wavelength range; a second reflective element optically associated with the second light source, the second reflective element configured to reflect light in at least the first wavelength range; and a second dichroic element disposed in a light path of the first light source and a light path of the second light source. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification