REFLECTION PREVENTIVE FILM OF PLASTIC OPTICAL PARTS

摘要

PURPOSE:To obtain a reflection preventive film superior in intimate adhesion to a plastic surface and durability and suitable for mass production by forming a thin dielectric film serviceable as the reflection preventive film on a thin metal film layer. CONSTITUTION:A reflection preventive film, etc., of an optical parts 1 made of plastics is composed of a thin dielectric single film layer 4 made of MgF2 formed in a film thickness of 100nm on said plastic optical part 1 and a thin metallic film layer 5 made of Ni. Each layer is formed by the vacuum vapor deposition method in the state of the optical part maintained at a temp. of <=60 deg.C in an atm. of air.