公开(公告)号：US20190172698A1

公开(公告)日：2019-06-06

申请号：US16095909

申请日：2017-04-12

Applicant: USHIO DENKI KABUSHIKI KAISHA

Inventor： Yuichi SASAKI ,  Takumi YAMANE

IPC: H01J61/30 ,  H01J61/16 ,  H01J61/36

CPC classification number: H01J61/30 ,  C03B2201/075 ,  H01J61/04 ,  H01J61/16 ,  H01J61/36

Abstract: A discharge lamp includes a discharge vessel. A xenon gas is sealed within the discharge vessel so as to serve as a light emitting gas, the discharge vessel is made from quartz glass, a pair of electrodes are arranged so as to face each other in the discharge vessel, and the discharge vessel has a chip portion. The chip portion is made from a glass member that has a composition different from that of the discharge vessel, and the glass member has a transmittance of 50% or more over a wavelength range from 170 nm to 300 nm.