| abstract |
An ultraviolet resistant quartz glass having durability against an excellent harmonic laser and a method for producing the same are provided. A method for producing an ultraviolet resistant quartz glass comprising melting synthetic silica powder. A method for producing an ultraviolet-resistant quartz glass, which comprises arc plasma melting silica powder. When the YAG laser (irradiation conditions: YAG laser output: 180 mW, pulse width: 20 nsec, frequency: 80 kHz) is irradiated with the fourth harmonic (266 nm), the initial transmittance at an optical path length of 30 mm is 100%, and the transmittance is reduced by 3%. The irradiation time until is defined as resistance to ultraviolet rays (hereinafter referred to as ultraviolet resistance), and the ultraviolet resistance quartz glass having the ultraviolet resistance of 2500 seconds or more. A YAG laser harmonic optical member made of the quartz glass of the present invention. [Selection figure] None |