REFLECTING MIRROR

PURPOSE:To prevent the oxidation and deterioration of the first and second metal films and interference film and to improve the heat resistance of the reflecting mirror by forming a thick protective film on the second metal film. CONSTITUTION:This reflecting mirror 6 is formed with a substrate 1 consisting of either of glass, metal and resin, a first metal film 2 vacuum-deposited on the surface of the substrate 1, an interference film 3 vapor-deposited on the surface of the first metal film 2 and a second metal film 4 vapor-deposited on the surface of the interference film 3. A chromium protective film 5 having >=150A thickness is further vapor-deposited on the surface of the second metal film 4. In this case, the first metal film 2 is the semi-transparent thin film partially reflecting incident light 7, and the brightness of the light is adjusted by changing the film thickness. The light transmitted through the first metal film 2 is partially reflected by the second metal film 4. The reflection of light is interfered by the film 3 between the first metal film 2 and the second metal film 4, and the hue is adjusted by changing the film thickness.