| 摘要 |
An objective is to prevent a niobium lead wire protruding from a narrow tube portion of a discharge container from being readily broken in a lamp production process, or the like, such that the lamp production process becomes more efficient. The ceramic metal halide lamp has a translucent external tube, a discharge container having a light-emitting portion (130C) and a narrow tube portion (130A), and an electrode system (120a) mounted in the narrow tube portion (130A) of the discharge container, the electrode system (120a) having a tungsten electrode (123), a current-supplying conductor (122), and a niobium lead wire (121). A connecting portion between the current-supplying conductor (122) and the lead wire (121) is disposed inside the narrow tube portion (130A). A portion of the lead wire (121) is disposed inside the narrow tube portion (130A) and the remaining portion of the lead wire (121) protrudes from a front end of the narrow tube portion (130A). A gas-absorbing member (131) is fitted in the periphery of the protruding portion, close to the narrow tube portion (130A), for absorbing a gas that is generated when a sealing portion is formed on the narrow tube portion (130A). |
