| 摘要 |
PROBLEM TO BE SOLVED: To consider a source of ultraviolet light so as to perform a proper measure. SOLUTION: A discharge lamp includes an ultraviolet light generation means generating ultraviolet light; and a valve 1 which is composed of vitreous silica including the ultraviolet light generation means, and has compressive strain SI provided on one inner surface layer. COPYRIGHT: (C)2008,JPO&INPIT
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