| 摘要 |
A lamp bulb for a high pressure discharge lamp that includes a pair of opposing electrodes that projects a predetermined distance into a discharge chamber, molybdenum foils, lead wires, and a bulb, the lamp bulb includes a discharge chamber filled with a metal halide and a rare gas, the discharge chamber including at least a concave surface curving inwardly with respect to a Z-axis of the automotive high pressure discharge lamp, a discharge chamber portion surrounding the discharge chamber, including at least a convex surface curving outwardly along the Z-axis of the discharge lamp, tapered portions tapering towards the discharge chamber, sealed ends in which are located the molybdenum foils, the electrodes, and the lead wires, and sealed portions substantially free from substantial curvature change, the sealed portions being located between the discharge chamber and the sealed ends.
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