Osram Gmbh

Bernhard Winzek

Rainer Koger

Adam Kotowicz

The invention relates to an electrode for a discharge lamp, wherein the electrode has a base body having an electrode plateau providing an end face of the electrode, wherein the base body is delimited by the electrode plateau in a longitudinal extension direction of the electrode. Furthermore, the electrode has a coating, arranged in at least a first region of the base body that is different from the electrode plateau, to increase an emission of heat. In addition, the electrode has an at least partially contiguous free region of the base body extending at least partly in the longitudinal extension direction as far as the electrode plateau, in which the coating for increasing the emission of heat is not arranged, and wherein the first region adjoins at least one section of the free region in the circumferential direction of the electrode.

Electrode for a discharge lamp, discharge lamp and method for producing an electrode

A discharge lamp () comprising a discharge vessel (), at least one electrode () arranged within the discharge vessel, wherein at least parts of the electrode () are provided with a particle composite coating () made up of a matrix layer and particles embedded in the matrix layer, wherein the extinction coefficient k of the material for the matrix layer is less than 0.1 in the spectral range between 600 nm and 2 &#x3bc;m, and wherein the extinction coefficient k of the material for the particles is greater than 0.1 in the spectral range between 600 nm and 2 &#x3bc;m.

Discharge lamp comprising coated electrode

A high-pressure discharge lamp comprising two electrodes (), which are arranged facing each other in a discharge vessel () and are each in electric contact via a current feed system (), wherein each current feed system penetrates a piston shaft () arranged in a gastight manner on the discharge vessel (), wherein in the region of the outer current feed () of at least one piston shaft () a cooling element () is arranged, and wherein the outer current feed () and the cooling element () are in direct thermal and electric contact.

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Berlin, Germany

Bernhard Winzek