High-pressure discharge lamp, high-pressure discharge lamp operating apparatus, and illuminating apparatus.

摘要

A high-pressure discharge lamp includes a translucent ceramic discharge vessel (1) having a surrounding part (1a) formed of translucent ceramic, and a pipe (1b) connected to the surrounding part (1a), formed of translucent ceramic having an average crystal particle size of 50 µm or less in a region close to an intended sealing portion (SP), and having a smaller diameter than the surrounding part (1a). A current introducing conductor (2) is inserted into the pipe (1b) of the translucent ceramic discharge vessel (1), and is sealed at least by a sealing portion (SP) formed by fusion of the translucent ceramic in the pipe (1b). An electrode (3) is connected to and disposed in the current introducing conductor (2) in the translucent ceramic discharge vessel (1). A discharge medium is sealed in the translucent ceramic discharge vessel (1).