| abstract |
The invention relates to a deuterium lamp having a lamp base, which has electrode passages, with a piston made of glass and with a housing structure comprising anode, cathode and aperture, wherein at least a part of the piston forms a jet exit surface and wherein lamp base and piston enclose a gas space, and consists in that the piston has on its surface facing the gas space at least at the jet exit surface a gas diffusion barrier layer. |