EP 0604207 B1 20000614 - A metal halide arc discharge lamp
Title (en)
A metal halide arc discharge lamp
Title (de)
Metall-Halogen Bogen Lampe
Title (fr)
Lampe à arc à halogénure métallique
Publication
Application
Priority
US 99560392 A 19921222
Abstract (en)
[origin: EP0604207A1] An arc tube (6) for a metal halide discharge lamp (2) is formed of titanium oxide doped vitreous silica. In one embodiment of the invention the doped vitreous silica is fused quartz made from a melt doped with TiO2. In a preferred embodiment, the concentration of titanium oxide in the vitreous silica is approximately 250 parts per million by weight. Metal halide discharge lamps utilizing arc tubes formed from the doped vitreous silica demonstrate improved lumen output and lumen maintenance. It is believed that arc tubes formed from the doped vitreous silica also suffer less sodium loss than arc tubes formed from conventional fused quartz. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/30 (2006.01)
CPC (source: EP)
H01J 61/302 (2013.01)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0604207 A1 19940629; EP 0604207 B1 20000614; CA 2112063 A1 19940623; DE 69328857 D1 20000720; DE 69328857 T2 20010222
DOCDB simple family (application)
EP 93310407 A 19931222; CA 2112063 A 19931221; DE 69328857 T 19931222