公开(公告)号：US11482406B2

公开(公告)日：2022-10-25

申请号：US17456273

申请日：2021-11-23

申请人： Ushio Denki Kabushiki Kaisha

发明人： Takashi Yuki

IPC分类号： H01J61/073 ,  H01J61/52 ,  H01J61/35

摘要： At least one of the electrodes of a discharge lamp, including at an interior of a main body of the electrode: a heat-transmitting substance of the melting point lower than that of a material which makes up the main body; and a regulating body that is made up of a material of the melting point higher than that of the heat-transmitting substance, that includes a blade which extends in the axial direction and in a radial direction perpendicular to the axial direction, and that regulates convection of the heat-transmitting substance. Surface roughness Rz of at least one of a region which is on an inner wall face of the main body and with which the regulating body makes contact and a region which is on a surface of the regulating body and with which the inner wall face makes contact is not greater than 1.52 μm.