Patent ID: 6563267
Filing Date: 2003-05-13
Classification: H01J

Abstract:
A high-pressure discharge lamp comprising:a quartz glass discharge vessel, said discharge vessel enclosing a discharge space with a filling of at least a rare gas and mercury, a first electrode and a second electrode being present in said discharge space, a discharge extending between said first and second electrodes during lamp operation, the discharge vessel having a seal incorporating an electric conductor which connects the first electrode to a metal wire projecting from the seal to the exterior of the discharge vessel, the seal having a first and a second gastight portion between which a gas-filled cavity is present, the cavity containing a further rare gas or a gaseous constituent of the filling or a combination of both, the seal having a first external antenna at the area of the cavity, and the seal being connected to the discharge vessel at the area of a neck, and a second external antenna being present at the area of the neck.