Invention Grant
- Patent Title: Optical filter
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Application No.: US15071446Application Date: 2016-03-16
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Publication No.: US10408979B2Publication Date: 2019-09-10
- Inventor: Asana Yoshioka , Kazuhiko Shiono , Hiroyuki Arishima , Hiroki Hotaka
- Applicant: AGC Inc.
- Applicant Address: JP Chiyoda-ku
- Assignee: AGC Inc.
- Current Assignee: AGC Inc.
- Current Assignee Address: JP Chiyoda-ku
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2013-270008 20131226; JP2014-232201 20141114
- Main IPC: F21V9/04
- IPC: F21V9/04 ; F21V9/06 ; G02B5/08 ; G02B5/20 ; B32B7/02 ; B32B7/00 ; G02B5/22 ; G02B5/28

Abstract:
Provided is an optical filter, which includes a light-absorbing layer and a light-reflecting layer and satisfies the following requirements: (i) in a spectral transmittance curve at an incident angle of 0°, an average transmittance over the 430-620 nm wavelength range is ≥80%, an average transmittance over the 430-450 nm wavelength range is ≥76%, an average transmittance over the 735-1100 nm wavelength range is ≤5%, and an average transmittance over the 350-395 nm wavelength is ≤5%; and (ii) there is a wavelength λ0(UV) with transmittance of 50% in the 400-425 nm wavelength range in the spectral transmittance curve at the incident angle of 0°, there is a wavelength λ30(UV) with transmittance of 50% in the 400-425 nm wavelength range in a spectral transmittance curve at an incident angle of 30°, and an absolute value of a difference between the wavelengths, |λ0(UV)−λ30(UV),| is ≤5 nm.
Public/Granted literature
- US20160195651A1 OPTICAL FILTER Public/Granted day:2016-07-07
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