High-pressure discharge lamp

A high-pressure discharge lamp, comprising:

• an arc tube that is made up of a main-tube part in which a discharge space is formed, and two thin-tube parts extending from both ends of the main-tube part, the main-tube part and the two thin-tube parts being made from a translucent ceramic material;
• and
• a pair of electrodes having rods that respectively extend through the two thin-tube parts into the discharge space so that tops thereof face each other with a predetermined distance in-between, the rod of at least one of the electrodes being held by a tubular electrode holder embedded in and bonded to the thin-tube part via an adhesive agent, the electrode holder being made of a halide-resistant metal, the adhesive agent including a sintered halide-resistant metal impregnated with mixture glass,
• wherein a temperature of one end, closer to the discharge space, of a bonding area formed using the adhesive agent does not exceed a lowest temperature at which an erosion action of a light-emitting material enclosed in the discharge space on the mixture glass occurs.

A high-pressure discharge lamp, comprising:

• an arc tube that is made up of a main-tube part in which a discharge space is formed, and two thin-tube parts extending from both ends of the main-tube part, the main-tube part and the two thin-tube parts being made from a translucent ceramic material;
• and
• a pair of electrodes having rods that respectively extend through the two thin-tube parts into the discharge space so that tops thereof face each other with a predetermined distance in-between, the rod of at least one of the electrodes being held by a tubular electrode holder embedded in and bonded to the thin-tube part via an adhesive agent, the electrode holder being made of a halide-resistant metal, the adhesive agent including a sintered halide-resistant metal impregnated with mixture glass,
• wherein the adhesive agent is at such a position that is away from a top of the electrode whose rod is held by the electrode holder, by a distance that is out of a range where the mixture glass receives an erosion action of a light-emitting material enclosed in the discharge space at steady lighting.