High pressure discharge lamp

Abstract

To provide a high pressure discharge lamp in which no fusing of the metal foil occurs even if the high pressure discharge lamp is switched on for a certain time a high pressure discharge lamp is provided having a discharge vessel comprised of a light emission part and sealing parts made of glass connected to opposite ends of said light emission part; metal foils buried in a respective one of said sealing parts; a pair of electrodes comprised of core rods and tip end parts, said tip end parts being arranged oppositely to each other in the light emission part; and said core rods being melted and fused together with a respective one of the metals foils; wherein cavities are formed which reach from a surface of a respective one of the metal foils to an interior of the core rod, and the glass constituting said sealing part has entered into said cavities.

Dependencies are inferred from the claim text.