Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masahito Yoshida0
Shunsuke Kakisaka0
Date of Patent
June 21, 2011
0Patent Application Number
122778430
Date Filed
November 25, 2008
0Patent Primary Examiner
Patent abstract
A metal halide lamp according to the present invention includes: an outer tube 2; an inner tube 3 that is provided in the outer tube 2, has a sealing portion 10 in at least one end portion, and is made of quartz glass; an inner tube 3 provided in the outer tube 2; and an arc tube 4 provided in the inner tube 3, wherein assuming that the outer tube 2 has a maximum outer diameter A (mm), the inner tube 3 has a maximum outer diameter B (mm), and the metal halide lamp 1 consumes P (W) of power, the following relationships are satisfied:0.06P+15.8≦A≦25,0.05P+9.0≦B, and1.14≦A/B,where P satisfies 20 W≦P≦130 W.
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