Patent ID: 6844280

Claim:
A high transmittance glass sheet formed of a composition comprising silica as a main component and as coloring components, expressed in wt. %: greater than or equal to 0.005% to less than 0.02% of total iron oxide in terms of Fe 2 O 3 (T—Fe 2 O 3 ); less than 0.008% of FeO; and 0.02 to 0.25% of cerium oxide, wherein the composition has a ratio (FeO ratio) of FeO in terms of Fe 2 O 3 to T—Fe 2 O 3 of lower than 22%; and the glass sheet has, on a 4.0 mm thickness basis, a solar radiation transmittance of 90.0% or higher, a visible light transmittance of 90.5% or higher, a dominant wavelength of 540 to 580 nm, and an excitation purity of 0.36% or lower, where the visible light transmittance, the dominant wavelength, and the excitation purity are measured with illuminant C.