Patent ID: 6800998
Filing Date: 2004-10-05
Classification: H01J

Abstract:
A discharge lamp, comprising:a discharge vessel, wherein the discharge vessel comprises Ar and a mixture of metal iodides at a pressure of 60 mbar; an outer bulb filled with gas containing nitrogen, wherein the discharge vessel is surrounded, at a distance, by the outer bulb filled with gas; and a non-activated getter disposed within the outer bulb, wherein the getter comprises more than 80 percent by weight Zr and Co and furthermore comprises one or more elements chosen from among rare earth metals, wherein the non-activated getter is configured to remove hydrogen present in the outer bulb to a quantity of less than 0.001 molecular percent of hydrogen in the gas of the outer bulb after 100-200 hours of burning and without the non-activated getter becoming poisoned by the nitrogen.