| abstract |
To form side tubes with adequate resistance to pressure, and to provide a short-arc, ultra-high-pressure discharge lamp having such side tubes, and to provide a method of manufacturing such a lamp, a short-arc, ultra-high-pressure discharge lamp ( 1 ) has a luminescent tube ( 10 ) within which a pair of electrodes ( 2,2 ) face each other, and side tubes ( 11 ) that extend from opposite sides of the luminescent tube and in which a portion of the electrodes is sealed and in which a small space (B) is formed to enable the electrodes ( 2 ) to expand and contract freely without compression along their axes due to a difference in the indices of expansion of the materials that make up the electrodes ( 2 ) and the side tubes ( 11 ). |