Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Gesellschaft MIT Beschrankter Haftung

Osram Ag

Plansee Se

Wolfgang Spielmann

Dietmar Ehrlichmann

Thomas Mehr

Nikolaus Reheis

Rainer Koger

Lars Menzel

Markus Kolodziejczyk

Stephen Berndanner

Peter Pohl

Markus KÖGL

Stephan Berndanner

The invention relates to a high-pressure mercury discharge lamp for DC operation at a nominal wattage of more than 1.5 kW. Said high-pressure mercury discharge lamp comprises an anode, at least some areas of which are made of a material containing at least some tungsten, said material having a grain number of more than 200 grains per mmand a density of more than 19.05 g/cm.

High-pressure mercury discharge lamp

A short arc high-pressure discharge lamp () for dc operation, includes a discharge vessel () that has two necks () diametrically opposite each other, in which an anode () and a cathode () made of tungsten are melted in a gastight manner, and which has a filling made of at least one noble gas and possibly mercury. According to the invention, at least the material of the cathode tip () contains lanthanum oxide LaOand at least another oxide from the group consisting of hafnium oxide HfOand zirconium oxide ZrOin addition to the abovementioned tungsten.

Short arc high-pressure discharge lamp

Growing community of inventors

Ehrwald, Austria

Wolfgang Spielmann