| abstract |
(57) [Problem] To provide an ultraviolet ray reflective glass article using an optical thin film having a high refractive index or a low refractive index for enhancing the reflection performance in the ultraviolet region and the heat ray region. SOLUTION: On a transparent glass substrate, a layer of a first high refractive index film having a refractive index of 2.0 to 2.6 and an optical film thickness of 190 to 260 nm, a refractive index of 1.6 or less and 240 to 340 1. a layer of a low refractive index film having an optical thickness of Three layers of a second high refractive index film having a refractive index of 0 to 2.6 and an optical film thickness of 190 to 260 nm are laminated in this order, wherein the low refractive index film is It has an optical film thickness that is at least 20 nm larger than both the optical film thickness of the first high-refractive-index film layer and the optical film thickness of the second high-refractive-index film layer, and has an ultraviolet reflectance (35% or more). An ultraviolet ray reflective glass article having a solar light reflectance of 15% or more (the surface of the multilayer film) and a visible light transmittance of 70% or more. |