High pressure discharge lamp with two part lead through elements that can withstand thermal shocks and are exposed to less high temperatures.

摘要

The discharge vessel has a ceramic wall (10) and is sealed by a ceramic plug (30,40). The discharge space accommodates electrodes (50,60) connected to leadthrough elements (70,80) projecting into the ceramic plug with a gas tight fit and secured by means of a sealing ceramic (15). The leadthrough element includes a first part (71,81) that forms a cermet, and a second part (72,82) of metal which extends from the cermet in the direction of the electrodes.