Illumination – Light source and modifier – Including selected wavelength modifier
Reexamination Certificate
2005-10-11
2009-06-09
Hammond, Briggitte R (Department: 2833)
Illumination
Light source and modifier
Including selected wavelength modifier
C257S098000
Reexamination Certificate
active
07543959
ABSTRACT:
A light emitting device includes a light emitting element, an optical concentrator, such as a compound parabolic concentrator, a dichroic filter between the light emitting element and the optical concentrator and a wavelength converting material, such as a phosphor. The optical concentrator receives light from the light emitting element, via the dichroic filter, and emits the light from an exit surface, which is smaller than the entrance surface. The optical concentrator may be manufactured from a material with a high refractive index, such as sapphire. The wavelength converting material is, e.g., disposed over the exit surface. The radiance of the wavelength converting material is increased by pumping the wavelength converting material through a high index of refraction material and outputting the converted light into a low refractive index medium, such as air.
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Bierhuizen Serge J.
Harbers Gerard
Girardi Vanessa
Hammond Briggitte R
Philips Lumiled Lighting Company, LLC
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