Method for preventing fading of dyed plastic lens

Abstract

Abstract PURPOSE:To provide a dyed plastic lens which prevents fading, provides resistance to scuffing, has a less glittering surface and improves the durability of a spectable lens, etc. by coating a silane coupling agent on the surface of the dyed plastic lens and forming further an antireflection film thereon by vacuum deposition. CONSTITUTION:After a plastic lens is dyed in a heated dyeing bath, a soln. of one kind among silane coupling agents such as H2NCONHCH2CH2Si(OCH2CH3)3, CH2=CHSi(OCH2CH3), etc. or the mixture composed thereof is uniformly coated thereon to 0.05-1.5mu thickness by a dipping method, spraying method, etc. and is cured for 30min-5hr at 50-80 deg.C. The film is then deposited thereon with >=2 kinds among SiO2, ZrO2, Ta2O5, Al2O3, SiO2, etc. in multiple layers by vapor deposition to 0.25-2mu thickness by which an antireflection film is formed. The decomposition and desorption of the dye molecules are thus prevented, by which the fading is prevented. The lens has the resistance to scuffing and the glitter on the surface is decreased.

Inventors

• 👤 Koji Futaki
• 👤 二木　宏治
• 👤 Toru Chiba
• 👤 亨 千葉
• 👤 Morio Takamizawa
• 👤 高見沢　守雄
• 👤 Takao Fujisawa
• 👤 藤沢　貴雄

Bibliographic Details