PRODUCTION METHOD OF DISCHARGE LAMP

摘要

A discharge lamp manufacturing method that enables the energy loss of a laser beam irradiated from outside an arc tube to be suppressed when forming a pair of electrodes by fusion cutting a predetermined cutting site of a tungsten rod disposed within a sealed arc space. Even when a film of an arc material (e.g., mercury) forms on an inner wall of an arc tube (10) due to the arc material evaporating when the temperature of the arc tube (10) is raised as a result of a laser beam (60) being irradiated from outside the arc tube (10), this manufacturing method is able to eliminate the film through evaporation by heating the arc tube (10) with a coil heater (125) before irradiating the laser beam (60) again.