Arc tube for electrodeless high pressure sodium lamp

Details Arc tube for electrodeless high pressure sodium lamp Arc tube for electrodeless high pressure sodium lamp

H - Electricity

01

J

H01J 65/00 (2006.01) H01J 61/36 (2006.01)

Patent

CA 2183288

Electrodeless arc tubes for high pressure sodium discharge lamps comprise a substantially tubular, translucent body formed from a material comprising sintered polycrystalline alumina. The body has an inside diameter and an outside diameter and a given length. A fill comprising sodium and xenon are loaded within the body. At least one end-seal is provided for the body, the end-seal comprising a first alumina disc sealed within the inside diameter by compression, the first disc being spaced inwardly from an end of the body and having a substantially centrally located aperture therein. A second alumina disc seals the aperture, the second disc being bonded to the first disc and to the inner wall of the body by a sealing frit.

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