Patent ID: 9459388
Filing Date: 2016-10-04
CPC Classification: G02B

Claim Text:
1. A multi-layered optical film formed on a plastic substrate, wherein each layer of the multi-layered optical film is made of an oxide or an oxynitride, layers adjacent to each other are made of two kinds of materials having different refractive indexes, oxidation-reduction potential of elements constituting oxides or oxynitrides is −0.9 volts or less, thickness of a first layer adjacent to the substrate is 10 nanometers or more, an absolute value of a difference in refractive index between a material of the substrate and a material of the first layer is 0.2 or less, an absolute value of a difference in refractive index between the two kinds of materials of all two layers that are adjacent to each other is 0.4 or less and total thickness of the multi-layered optical film is 3000 nanometers or less.