High pressure discharge lamp and method for producing thereof

摘要

A high pressure discharge lamp includes a quartz glass bulb having a sealing portion; and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5x10-3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1x10-8 mumol/mm3 and 1x10-7 mumol/mm3.