Patent ID: 8679994

Claim:
A method of inspecting a synthetic silica glass molded body, comprising: irradiating the synthetic silica glass molded body with a spectrum line of an Hg lamp having a wavelength of 254 nm, at an irradiance condition of 10 mW/cm 2 or more, which has been transmitted through a filter for any one of blocking a visible light and reducing an intensity thereof; measuring, in a direction perpendicular to the irradiation direction of the spectrum line, an intensity of a bright line having a wavelength of 254 nm emitted by the synthetic silica glass molded body, and a fluorescent light intensity from a green to a yellow fluorescent light having a center wavelength of 500 nm to 600 nm emitted by the synthetic silica glass molded body; and screening a portion which satisfies a condition that a ratio of the bright line intensity and the fluorescent light intensity (fluorescent light intensity/bright line intensity) is 0.005 or less.