DISCHARGE LAMP AND ELECTRODE USED FOR THE SAME

To achieve higher output and longer life of a discharge lamp.SOLUTION: At least one electrode of the discharge lamp includes a body that has a sealed space inside the electrode, a heat transfer body filled within the sealed space and having a lower melting point than a material that constitutes the body, and a regulating body that is arranged in the sealed space, regulates the convection of the heat transfer body, and has a higher melting point of the surface than the melting point of the heat transfer body. The regulating body includes a first regulating body, the density of which is higher than that of the heat transfer body and a second regulating body, the density of which is lower than that of the heat transfer body.SELECTED DRAWING: Figure 2 【課題】放電ランプの高出力化及び長寿命化を図る。【解決手段】放電ランプの少なくとも一つの電極は、前記電極の内部に密閉空間を有する本体と、前記密閉空間内に充填され、前記本体を構成する材料よりも融点の低い伝熱体と、前記密閉空間内に配置され、前記伝熱体の対流を規制するとともに、前記伝熱体の融点よりも表面の融点が高い、規制体と、を備え、前記規制体は、前記伝熱体よりも密度が大きい、第一規制体と、前記伝熱体よりも密度が小さい、第二規制体と、を含む。【選択図】図２