发明授权
- 专利标题： High-pressure discharge lamp including a limited amount of carbon remaining on an electrode surface
- 专利标题（中）： 包括残留在电极表面上的有限量的碳的高压放电灯
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申请号： US09458793申请日： 1999-12-10
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公开(公告)号： US06249086B1公开(公告)日： 2001-06-19
- 发明人: Hisashi Honda , Seiji Ashida , Kiyoshi Saita , Ariyoshi Ishizaki , Akira Itoh , Shigehisa Kawatsuru , Tatsuo Otabe
- 申请人： Hisashi Honda , Seiji Ashida , Kiyoshi Saita , Ariyoshi Ishizaki , Akira Itoh , Shigehisa Kawatsuru , Tatsuo Otabe
- 优先权： JP10-106801 19980416; JP10-210056 19980724
- 主分类号： H01J1704
- IPC分类号： H01J1704
摘要：
A high-pressure discharge lamp which includes a light-transmitting air-tight discharge container, an electrode formed of tungsten as a main component and fixedly sealed in the discharge container, and a discharge medium containing a halide of a light emitting metal and sealed in the discharge container. The surface of the electrode is defined as follows. That is, the average value of center line average roughness Ra of the surface, is set to 0.3 &mgr;m or less, or the average value of the center line average roughness Rz of the surface of the electrode, is set to 1.0 &mgr;m or less, or the average value of the surface area increasing rate of the surface of the electrode is set to 1.0% or less.
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