Patent ID: 8310156
Filing Date: 2012-11-13
Classification: H01J

Abstract:
1. A high-pressure discharge lamp, comprising: a discharge vessel made from quartz glass which is sealed in a gas-tight manner and in which electrodes and an ionizable fill for generating a gas discharge are enclosed, the ionizable fill being in the form of a mercury-free fill which comprises xenon and halides of the metals sodium, scandium, zinc and indium, wherein the weight ratio of the halides of zinc and indium is in the range of from 20 to 100, wherein the weight proportion of the halides of zinc is in the range of from 0.88 microgram to 2.67 micrograms per 1 mm wherein the weight proportion of the halides of sodium is in the range of from 6.6 micrograms to 13.3 micrograms per 1 mm wherein the coldfilling pressure of xenon is in the range of from 1.3 megapascal to 1.8 megapascal, and wherein the volume of the discharge vessel is greater than or equal to 20 mm