SHORT ARC TYPE EXTRA-HIGH PRESSURE DISCHARGE LAMP

摘要

PROBLEM TO BE SOLVED: To provide a discharge lamp having a lighting system suitable for a light source for a projector. SOLUTION: A discharge vessel 12 forms sealing parts on both ends, and contains mercury of 0.15 mg/mm<3> or more. A pair of main electrodes being 2.5 mm or less in an interval between electrodes 14 and 15 are oppositely arranged. A conductive wire We extending toward one sealing part from the root of the other sealing part is arranged on an outside surface of the discharge vessel 11. This conductive wire We is not directly electrically connected to the main electrodes, and is separately electrically connected by a starter.