Patent ID: 6250758
Filing Date: 2001-06-26
Classification: B32B,C23C,G02B

Abstract:
Plastic optical devices in which an antireflection film (13) is coated at least on one surface of a plastic base material (10), characterized in that said antireflection film (13) is a multi-layered film which is formed by depositing a first layer (131) on the side of said plastic base material substantially by a high-refractive material and the next layer (132) by a low-refractive material and by alternately laminating those high-refractive materials and low-refractive materials, whose dominant wavelength range is 480 to 550 nm, excitation purity range is 10 to 30% and luminous reflectance is 0.7 to 1.8%, and which has a greenish interference color.