Discharge lamp

A discharge lamp comprising:

• a coaxial waveguide comprising an internal conductor and a pipe-shaped external conductor surrounding the internal conductor, and
• a discharge tube comprising:
• a glass tube having:
• an ellipse spherical bulged part formed in a middle of a longitudinal direction, an inside of which forms a discharge space, and
• both ends pinched and sealed;
• and
• a conductor assembly sealed and attached to an end of the glass tube, and
• wherein the discharge tube is inserted conductor assembly end first and held in a top opening of the coaxial waveguide.

A method of manufacturing a discharge lamp comprising a coaxial waveguide and a discharge tube, the method comprising:

• constructing the discharge tube by
• forming an ellipse spherical bulged part in a middle of a longitudinal direction of a glass tube having a double end shape, wherein an inside of the ellipse spherical bulged part forms discharge space,
• pinching and sealing both ends of the glass tube, and
• sealing and attaching a conductor assembly to an end the glass tube;
• constructing the coaxial waveguide with an internal conductor and a pipe-shaped external conductor surrounding said internal conductor;
• adapting the coaxial waveguide to hold the discharge tube in a top opening thereof;
• and
• inserting the discharge tube conductor assembly end first into the top opening of the coaxial waveguide.