Patent ID: 7034460

Claim:
A high pressure discharge lamp comprising: a luminous bulb with a luminous substance enclosed therein; a side tube portion for retaining the airtightness of the luminous bulb; and a trigger wire wound around the side tube portion, wherein the side tube portion includes a first glass portion extending from the luminous bulb and a second glass portion distinct from said side tube portion and provided in at least a portion of the inside of the first glass portion, in the second glass portion, at least one selected from the group consisting of Li, Na, and K is contained in an amount of from 0.001 wt % to 1.0 wt % inclusive, within the luminous bulb, a pair of electrodes are opposed to each other, each of the pair of electrodes is electrically connected to a metal foil, the metal foil is embedded in the side tube portion and at least a portion of the metal foil is covered with the second glass portion, and the side tube portion includes a portion to which a compressive stress is applied.