Electrodeless lamp

A lamp has a body of sintered alumina ceramic material and an artificial sapphire window . The body is initially molded in green state and the window is pressed into a front recess . The combination is fired at a temperature of the order of 1500° C., to fuse the body into a coherent pressure-tight s...

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Bibliographic Details
Main Authors Pothoven, Floyd R, Pothoven, Terry A
Format Patent
LanguageEnglish
Published 15.02.2005
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Summary:A lamp has a body of sintered alumina ceramic material and an artificial sapphire window . The body is initially molded in green state and the window is pressed into a front recess . The combination is fired at a temperature of the order of 1500° C., to fuse the body into a coherent pressure-tight state with the window. After partial cooling to the order of 600° C., a pellet of excitable material is added through a rear, charging aperture . A disc of ceramic with frit is placed over the aperture. The disc is irradiated by laser to fuse the frit and the disc to the body, thus sealing the excitable material into the lamp.