公开(公告)号：US10408981B2

公开(公告)日：2019-09-10

申请号：US14722792

申请日：2015-05-27

Applicant: AGC Inc.

Inventor： Akihiko Yoshihara ,  Takaaki Murakami

IPC: G02B5/28 ,  G02B5/26 ,  G03B11/00 ,  H01L31/0216 ,  H01L27/146

Abstract: A near-infrared cut filter has a transparent substrate and an optical multilayer film formed on the transparent substrate and including high-refractive index films each having a refractive index at a wavelength of 500 nm in a range of 2.0 to 2.8 and low-refractive index films each having a refractive index at the wavelength of 500 nm of less than 1.6. The multilayer film is formed such that the high-refractive and low-refractive index films are alternately stacked and that the filter has spectral transmittance characteristic for the entire wavelength range of 450 nm to less than 550 nm and part of that wavelength range for incident light having incident angle of 0 degree, and part of wavelength range of 450 nm to less than 550 nm and the entire wavelength range of 450 nm to less than 550 nm for incident light having incident angle of 40 degrees.