| 摘要 |
PURPOSE:To improve weatherability, wear resistance and antireflection effect by providing multi-layered films contg. diamond-like carbon film on a surface. CONSTITUTION:At least one layer of the diamond-like carbon film is used in the multi-layered films provided on at least one surface of a synthetic resin lens. The substrate is permitted to be increased up to just about 120 deg.C if the substrate is of a synthetic resin and therefore, a plasma cracking vapor deposition method, ion beam sputtering method or ion plating method in which vapor deposition is possible at about a room temp. is adequate. The mechanical strength over the entire part of the film is thereby increased. The improvement in wear resistance is observed as compared to the case when a material such as SiO2 is directly deposited by evaporation on the surface of the synthetic resin even if the diamond-like carbon film is not formed on the uppermost layer. The diamond-like carbon film is a film which deteriorates less with lapse of time even in a high refractive index material and contributes to the improvement in the durability over the entire part of the multi-layered film. |
