SHORT ARC TYPE MERCURY LAMP AND LAMP UNIT

摘要

PROBLEM TO BE SOLVED: To improve reliability of a lamp action by preventing and suppressing formation of a mercury bridge. SOLUTION: This short arc type mercury lamp comprises an arc tube 10 having a pair of facing electrodes 12 and 12' disposed in a tube 15 filled with mercury 18 as luminescent material, and a pair of sealing parts 20 and 20' for sealing a pair of metal foils 24 and 24' electrically connected to the pair of facing electrodes 12 and 12', respectively. The center axis 19 of the electrode 12 is mutually shifted from the center axis 19' of the electrode 12'.