| 摘要 |
A discharge lamp with high radiance in which constant feed of the emitter to the electrode tip is achieved, in which a good electron emission characteristic is maintained, and which has electrodes by which stable operation over a long time is maintained is obtained in a discharge lamp (10) which has a translucent vessel (2) which is hermetically closed and contains a pair of opposite electrodes (3,4) that are electrically connected via hermetically sealed areas by at least one of the electrodes (3) being made of a metal with a high melting point that has a hermetically sealed chamber (20) that contains an emitter (30) and a space (40) which is not filled with the emitter (30).
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