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1. (WO2001035443) HIGH-PRESSURE GAS DISCHARGE LAMP

Pub. No.:    WO/2001/035443    International Application No.:    PCT/EP2000/010221
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Tue Oct 17 01:59:59 CEST 2000
IPC: H01J 61/12
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors: VAN ERK, Willem
Title: HIGH-PRESSURE GAS DISCHARGE LAMP
Abstract:
The high-pressure gas discharge lamp (1) comprises a lamp vessel (2) having a wall (3) which is exposed to a wall load of at least 30 W/cm2 during operation of the lamp, and a discharge space (4) in which a pair of electrodes (5) is disposed. The discharge space (4) has a filling which comprises mercury, argon, and halides (not fluorides) of tin and indium, to which filling an alkali metal halide is added, the alkali metal being potassium, rubidium, or cesium, and the halide being chlorine, bromine, or iodine. The high-pressure discharge lamp (1) according to the invention has an improved resistance against corrosion and crystallization of the quartz glass wall (3).