SHORT WAVELENGTH ULTRAVIOLET DISCHARGE LAMP AND ULTRAVIOLET RAY IRRADIATOR

摘要

An ultraviolet discharge lamp comprising an insulated conductor coated with a fluororesin and radiating ultraviolet-rays having a wavelength of 220 nm or less, in which generation of hydrogen fluoride and hydrofluoric acid harmful to the human body and causing reduction in quantity of radiation light is suppressed. The discharge lamp comprises a quartz glass tube (31), a pair of electrodes (32a, 32b) arranged at the opposite ends thereof, and a lead wire (60) extending along the outer wall of the quartz glass tube. The lead wire is obtained by covering an insulated conductor coated with an insulator composed of a fluororesin with a metal outer layer material. Since the fluororesin is not irradiated with ultraviolet rays while the lead wire is irradiated with ultraviolet-rays, hydrogen fluoride and hydrofluoric acid are not generated.