Invention Grant
- Patent Title: Near-infrared cut filter
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Application No.: US14722792Application Date: 2015-05-27
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Publication No.: US10408981B2Publication Date: 2019-09-10
- Inventor: Akihiko Yoshihara , Takaaki Murakami
- Applicant: AGC Inc.
- Applicant Address: JP Tokyo
- Assignee: AGC Inc.
- Current Assignee: AGC Inc.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2012-263536 20121130
- Main IPC: G02B5/28
- 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.
Public/Granted literature
- US20150260888A1 NEAR-INFRARED CUT FILTER Public/Granted day:2015-09-17
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