DISCHARGE LAMP AND LAMP UNIT

摘要

PURPOSE: A discharge lamp and lamp unit is provided to maintain the sealing structure of the sealing portions for a long period of time, while lengthening useful life of the lamp. CONSTITUTION: A discharge lamp(100) comprises a luminous bulb(10) in which a luminous material(18) is enclosed and a pair of electrodes(12,12') are opposed in the luminous bulb; and a pair of sealing portions(20,20') for sealing a pair of metal foils(24,24') electrically connected to the pair of electrodes, respectively. At least one of the pair of sealing portions is equipped with at least one constricted portion(26) whose length in a thickness direction of the metal foil in the sealing portion is smaller than that of other portions in the sealing portion.