| 摘要 |
PURPOSE:To maintain the relatively high reflectivity of a bronze-colored mirror and to color the mirror to the bronze color at an adequate density by laminating a thin transparent dielectric film having a prescribed film thickness and thin reflective copper alloy film having a prescribed film thickness successively to one face of a transparent substrate and mounting electrical heating means thereto. CONSTITUTION:The thin transparent dielectric film 13 consisting of a material such as TiO2, CeO2, ZrO2, SnO2 or ZnS is formed on the transparent substrate 12 consisting or glass, plastic, etc. and the optical film thickness thereof is specified to <=1,000Angstrom . The thin reflective copper alloy film 14 essentially consisting of copper and having >=200Angstrom , more preferably >=500Angstrom film thickness is formed thereon. A pair of electrodes 16 are provided on both sides of the surface of the thin film 14 and lead wires 17 connected thereto are provided as the electrical heating means. The mirror surface is maintained at >=60 deg.C by electrical heating, by which the fogging is prevented. |
