Patent ID: 8704436

Claim:
A high-pressure discharge lamp comprising: an arc tube within which a discharge space is formed; and a pair of electrodes whose respective heads face each other within the discharge space, each electrode including: an electrode rod; a melted part formed by melting, and then solidifying, particular portions of at least one helical wire wound around a section of the electrode rod where a head of the electrode rod is included, the particular portions including a portion of an outer surface layer of the at least one helical wire and a portion of the at least one helical wire located around the head of the electrode rod; and a coil part consisting of an unmelted portion of the at least one helical wire, and partially covered with the melted part, wherein 0 < La L < 0.3 where La denotes an average value of a length in units of mm of an exposed portion of the coil part in an axial direction of the electrode rod, the exposed portion being not covered with the melted part, and L denotes a maximum value of a length in units of mm between a tip of the head of the electrode rod and an opposite edge of the coil part to the melted part, measured in the axial direction.