Gte Products Corporation

Benjamin M Alexandrovich

Valery A Godyak

Robert B Piejak

A method and apparatus which prevent mercury and fill gas loss in capacitively coupled electrodeless lamps operated at low frequencies (below 100 MHz). The lamp includes a lamp envelope with an inner coating of phosphor. Outer electrodes coupled to a radio frequency source are positioned around the outer surface of the lamp envelope. The lamp contains a fill gas (e.g. mercury and argon) which forms a plasma causing UV radiation which excites the phosphor. Mercury loss is prevented by providing a pair of inner conductors aligned with the outer conductors but electrically insulated therefrom. The inner conductors prevent the mercury and fill gas ions from embedding themselves in the lamp envelope.

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Watertown, MA, United States of America

Benjamin M Alexandrovich