Short arc high-pressure discharge lamp

Details Short arc high-pressure discharge lamp Short arc high-pressure discharge lamp

2007-10-09

2007-10-09

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Electrode composition

C313S572000

Reexamination Certificate

active

10506528

ABSTRACT:
A short arc high-pressure discharge lamp (1) for dc operation, includes a discharge vessel (2) that has two necks (4) diametrically opposite each other, in which an anode (26) and a cathode (7) 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 (11) contains lanthanum oxide La2O3and at least another oxide from the group consisting of hafnium oxide HfO2and zirconium oxide ZrO2in addition to the abovementioned tungsten.

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