Low-reflectance glass article and process for preparing the same

摘要

The present invention is a low reflection glass article which is prepared by laminating a first layer which has a middle refractive index (n₁) from 1.60 to 1.95 and has a film thickness of (60 to 130 nm)/n₁, a second layer which has a high refractive index (n₂) which is in a range from 1.91 to 2.60 and higher than the refractive index of said first layer by at least 0.20 and has a film thickness of (140 to 230 nm)/n₂, and a third layer which has a low refractive index (n₃) which is in a range from 1.35 to 1.59 and lower than the refractive index of said first layer by at least 0.20 and has a film thickness of (110 to 150 nm)/n₃ in this order on a transparent glass substrate having a refractive index from 1.47 to 1.53, wherein said second layer contains titanium oxide and other metal oxides in an amount of 70 mol % or more in total, said third layer contains a silicon oxide in an amount from 50 to 100 mol % and said metal oxides in an amount from 0 to 10 mol % in total, and said first layer contains a silicon oxide in an amount from 15 to 80 mol % and said metal oxides in an amount from 20 to 70 mol % in total.;According to the present invention, there can be provided a low reflection glass article coated with an optical multi-layer film which can reduce the reflectivity in wide visible light range.