Patent ID: 8390195

Claim:
A high pressure discharge lamp, comprising: a ceramic discharge vessel and a longitudinal axis, wherein at least one electrode is led out of the discharge vessel by means of a metal-containing feed-through, wherein the feed-through is connected to one end of the discharge vessel by way of a ceramic-containing adjustment part, wherein the adjustment part is tubular and, apart from a first and last layers, consists of individual layers with different compositions, at least two materials A and B respectively forming a plurality of layers of the adjustment part, these materials being chosen such that their coefficient of thermal expansion is between that of the feed-through and that of the end of the discharge vessel or at most is 10% outside, the layer thickness of each layer having reduced shear forces acting upon the layered material, and the layer thickness of the same material being different, wherein the layer thickness of each layer of the same material increases or decreases monotonously, the layer thicknesses of the material A and that of the material B developing in opposite directions from a maximum to a minimum thickness.