Patent ID: 6573657
Filing Date: 2003-06-03
Classification: H01J

Abstract:
A short-arc high-pressure discharge lamp (1) with a discharge vessel (2) which, besides a cathode (6) and an anode (8) that are situated opposite each other, contains a fill comprising at least xenon, wherein the cathode (6) has a conical end section (6a) facing the anode (8) and the anode (8) has a circular-cylindrical middle section (8a) and a frustoconical end section (8c) facing the cathode (6), characterized in that, for use in digital projection technologies, the high-pressure discharge lamp (1) has the following further features:the separation L in mm of the two mutually facing end sections (6a, 8c) of the cathode (6) and the anode (8) when the lamp is hot is given by the relationship 0.8Ã—P&lE;L&lE;1Ã—P+1, â€ƒwhere P is the lamp power in kw the diameter D of the circular-cylindrical middle section (8a) of the anode (8) in mm is given by the relationship D&gE;2.1Ã—L+10, â€ƒwhere L is the separation of the mutually facing end sections (6a, 8c) of the cathode (6) and the anode (8) in mm.