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Lamp bulb with integral reflector

United States Patent

January 30, 2001
View the Complete Patent at the US Patent & Trademark Office
An improved electrodeless discharge lamp bulb includes an integral ceramic reflector as a portion of the bulb envelope. The bulb envelope further includes two pieces, a reflector portion or segment is cast quartz ceramic and a light transmissive portion is a clear fused silica. In one embodiment, the cast quartz ceramic segment includes heat sink fins or stubs providing an increased outside surface area to dissipate internal heat. In another embodiment, the quartz ceramic segment includes an outside surface fused to eliminate gas permeation by polishing.
Levin; Izrail (Silver Spring, MD), Shanks; Bruce (Gaithersburg, MD), Sumner; Thomas L. (Wheaton, MD)
Fusion Lighting, Inc. (Rockville, MD)
09/ 380,832
September 10, 1999
This invention was made with Government Support under Contract No. DE-FG01-95EE23796 awarded by the Department of Energy. The Government has certain rights in this invention.