Electrodeless discharge lamp

摘要

An electrodeless discharge lamp having an ultraviolet radiation transmission envelope containing a plasma-forming medium. The envelope is formed from two different types of quartz, one of which blocks transmission of ultraviolet radiation 253 nm and shorter, and the other of which transmits radiation of 253 nm or shorter. The quartz which transmits the short wavelength radiation serves as a window for transmitting into the envelope ultraviolet having a wavelength short enough to initiate ionization of the plasma-forming medium within the envelope.