HEAT RAY SCREENING GLASS

摘要

A panel of radiant heat screening glass comprises a sheet of glass (5), a first layer (1) deposited on the sheet of glass (5) 55 nm to 70 nm thick and having a refractive index of 1.8 to 2.1 at a wavelength of 550 nm, a second layer (2) deposited on the first layer (1) and consisting of a TiO2 film which is 30 nm to 55 nm thick and has a refractive index of 2.3 to 2.5 at a wavelength of 550 nm, and a third layer (3) deposited on the second layer (2), 45 nm to 60 nm thick, and having a refractive index of 1.8 to 2.1 at a wavelength of 550 nm. Change in the color of the light transmitted through and reflected by the panel is very small and a comparatively high visible light transmittance and a low visible light reflectivity is provided. A film (4) of titanium nitride may be provided between the second and third layers (2, 3).