Glass mirror for rearview mirror

Abstract

Abstract PURPOSE:To obtain the titled easily preparable resultant mirror having the preventing effects on the dazzling, by depositing the vapor of Al on a blue glass plate, containing SiO2, Al2O3, CaO, MgO, Na2O, K2O, Li2O and a colorant, and having given transmittance characteristics. CONSTITUTION:A blue glass plate, containing 60-75wt% SiO2, 0.5-5wt% Al2O3, 5-15wt% CaO, 0-10wt% MgO, 6-16wt% total of CaO and MgO, 10-18wt% Na2O, 0-10wt% K2O, 0-1wt% Li2O, 11-19wt% total of Na2O, K2O and Li2O, and 0.05-0.4wt% CuO, 0.002-0.1wt% Cr2O3 and 0.0005-0.005wt% CoO as a colorant, and having the following transmittance characteristics is used: The transmittance of the glass plate of 2mm. thickness is a maximum of 80+ or -10% at 500nm wavelength and 0.75+ or -0.15 ratio between the transmittances at 450nm and 550nm wavelengths. Al vapor is then deposited on one side of the blue glass plate to give the aimed glass mirror for a rearview mirror.

Inventors

• 👤 Takao Omori
• 👤 隆雄 大森

Bibliographic Details