DISCHARGE LAMP MANUFACTURING METHOD

摘要

In a discharge lamp manufacturing method according to which a pair of electrodes is formed by fusion cutting a predetermined part of a tungsten rod (16) disposed within a sealed arc space, the fusion cutting of tungsten rod (16) for forming a pair of electrodes is executed with the entire arc-tube part heated to a temperature at which at least an arc material that includes mercury (118) enclosed within the arc tube evaporates. This allows for the arc material within the arc space to evaporate sufficiently, and for the adhesion, to the inner wall of the arc tube, of tungsten electrode material that evaporates due to the fusion cutting by laser beam to be suppressed. <IMAGE>