Abstract: A short arc type discharge lamp has a pair of electrodes, at least one of which has an electrode body and an axis part. A taper part is formed at a base side of the electrode body. Plural holes extending in an axis direction of the electrode in line are formed at the taper part.

Abstract: A short arc type discharge lamp comprises a pair of electrodes, at least one of which has an electrode main body portion and an axis portion and/or a taper portion formed between the electrode main body portion and the axis portion, wherein in the at least one of the electrodes, the axis portion has an outer diameter smaller than that of the electrode main body portion, and at least one groove extending in an axis line direction of the electrode is formed in the electrode main body portion, the axis portion or the taper portion.

Abstract: In a light emission portion of a short arc type high pressure discharge, a pair of electrodes, each of which has a block portion at a tip thereof, is provided, wherein a pseudo coil area made up of ring-like portions is formed in part of the block portion, and an unprocessed area whose diameter is approximately the same as that of the pseudo coil area is formed in a back side of the pseudo coil area.

Abstract: A fused joint structure comprises a metallic foil; and a conductive member made of high melting point metal, wherein a concave portion is formed in the metallic foil and the conductive member on an area where the metallic foil is put together on a surface of the conductive member, and wherein a circumferential edge of the concave portion is covered with the conductive member.

Abstract: A resistor for an electron gun assembly, for applying a resistor-divided voltage to an electrode provided in the electron gun assembly, comprises an insulative substrate, at least two first resistor elements disposed at predetermined positions on the insulative substrate, and a second resistor element having a predetermined pattern which electrically connects the first resistor elements. The resistor has a structure in which an effective length of the second resistor element between the first resistor elements varies in accordance with a position of the second resistor element relative to the first resistor elements.

Abstract: A resistor for an electron gun assembly, for applying a resistor-divided voltage to an electrode provided in the electron gun assembly, comprises an insulative substrate, at least two first resistor elements disposed at predetermined positions on the insulative substrate, and a second resistor element having a predetermined pattern which electrically connects the first resistor elements. The resistor has a structure in which an effective length of the second resistor element between the first resistor elements varies in accordance with a position of the second resistor element relative to the first resistor elements.