Patent ID: 8573801

Claim:
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.