Patent ID: 7750569
Filing Date: 2010-07-06
Classification: H01J

Abstract:
1. A high-frequency discharge lamp comprising a coaxial waveguide for high-frequency electromagnetic wave transmission wherein the coaxial waveguide comprises a discharge tube for emitting light of discharge by plasma generated by electromagnetic waves, wherein the discharge tube is constructed in a double end shape in which both ends of a ceramic tube or a glass tube are pinched and sealed, wherein the ceramic tube or the glass tube comprises an approximately ellipse spherical bulged part formed in a middle of a longitudinal direction, wherein a conductor assembly is sealed and attached to at least a proximal side seal attachment part, wherein a rare gas for starting with 1 atmospheric pressure or more at room temperature together with a light emission substance is enclosed inside of the approximately ellipse spherical bulged part, wherein an electromagnetic wave irradiation part is constructed by the conductor assembly and the external conductor top of the coaxial waveguide surrounding said conductor assembly by inserting and holding the proximal side seal attachment part of the discharge tube in a top opening of the coaxial waveguide so that the conductor assembly approaches the internal conductor of the waveguide, and wherein an auxiliary electrode for starting to which a high-voltage pulse generated by a high-voltage pulse generator is applied through a pulse transmission line is disposed near the approximately ellipse spherical bulged part of the discharge tube.