发明名称 |
High-pressure metal halide discharge lamp. |
摘要 |
The high-pressure metal halide discharge lamp has tungsten electrodes (2) in a light-transmitting lamp vessel (1) which is closed in a vacuumtight manner. The electrodes (2) comprise an emitter which is distributed throughout their mass and is formed by a first oxide chosen from hafnium oxide and zirconium oxide and by a second oxide chosen from yttrium oxide, lanthanum oxide, cerium oxide and scandium oxide, and are substantially free from thorium oxide. The lamp retains its initial light output to a high degree throughout its life. |
申请公布号 |
EP0647964(A1) |
申请公布日期 |
1995.04.12 |
申请号 |
EP19940202854 |
申请日期 |
1994.10.03 |
申请人 |
PHILIPS ELECTRONICS N.V. |
发明人 |
WILLEMSEN, MARTIN F. C.;GOODELL, PAUL DOUGLAS;VAN ERK, WILLEM |
分类号 |
H01J61/06;H01J61/073 |
主分类号 |
H01J61/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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