Anti-reflection film

Details Anti-reflection film Anti-reflection film

2008-05-27

2008-05-27

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Light interference

Produced by coating or lamina

C359S587000

Reexamination Certificate

active

11603903

ABSTRACT:
The present invention is dedicated to a cost reduced anti-reflection film of a multi-lamination structure that is reduced in number of layers and increased in thickness of the same for the purpose of facilitating the total control of the film thickness and that can be manufactured in a simplified process so as to reduce the manufacturing cost. Three component layers are deposited one over another on a substrate ranging from 1.90≦ns≦2.10 in refractive index at an arbitrary design basis wavelength within a wavelength range in and near visible band, and these layers exhibit optical properties as in the following table:Refractive Index ‘n’Optical Film thickness ‘nd’1st Layer1.54 ≦ n1≦ 2.000.465 λ ≦ n1d1≦ 0.575 λ2nd Layer1.95 ≦ n2≦ 2.630.490 λ ≦ n2d2≦ 0.508 λ3rd Layer1.35 ≦ n3≦ 1.550.245 λ ≦ n3d3≦ 0.255 λ.

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