HIGH-PRESSURE MERCURY VAPOR DISCHARGE LAMP AND METHOD OF MANUFACTURING A HIGH-PRESSURE MERCURY VAPOR DISCHARGE LAMP

摘要

A high-pressure mercury vapor discharge lamp (1) comprising an envelope (2) of a material capable of withstanding high temperatures with a discharge vessel (3) and two electrodes (5, 6) extending from two sealing sections (4) into the discharge vessel (3), said two electrodes having an electrode gap (dSUBe/SUB) smaller than or equal to 2.5 mm, preferably smaller than or equal to 1.5 mm, is described. The discharge vessel (3) contains a filling which essentially comprises the following substances: rare gas, oxygen, halogen consisting of chlorine, bromine, iodine, or a mixture thereof, as well as mercury in a quantity greater than or equal to 0.15 mg/ mmSUP3/SUP The electrodes (5, 6) are rod-shaped and designed such that they each have at their tip a nipple (7) extending in the longitudinal direction of the electrodes (5, 6) after a definite period of operation at the latest. In addition, a method of manufacturing such a high-pressure mercury vapor discharge lamp (1) as well as a projector system for such a high-pressure mercury vapor discharge lamp (1) is described.