Invention Grant
- Patent Title: Optical filter and imaging device
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Application No.: US15355190Application Date: 2016-11-18
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Publication No.: US10351718B2Publication Date: 2019-07-16
- Inventor: Kazuhiko Shiono , Keigo Matsuura , 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: JP2015-030077 20150218
- Main IPC: C09D5/32
- IPC: C09D5/32 ; G02B1/115 ; H04N5/335 ; G02B1/113 ; G02B5/28 ; C09D201/00 ; C09B57/00 ; C09D145/00 ; C09D167/00 ; C09D169/00 ; G02B5/20 ; G02B5/22 ; H01L27/146 ; C09D7/41 ; C09B23/10 ; C09B67/22 ; C08K5/00 ; C08K5/3415 ; C08K5/3417

Abstract:
An optical filter includes an absorption layer containing a near-infrared absorbing dye with an absorption characteristic in dichloromethane satisfying (i-1) to (i-3). (i-1) In an absorption spectrum of a wavelength of 400 to 800 nm, there is a maximum absorption wavelength λmax in 670 to 730 nm. (i-2) Between a maximum absorption coefficient εA of light with a wavelength of 430 to 550 nm and a maximum absorption coefficient εB of light with a wavelength of 670 to 730 nm, the following relational expression: εB/εA≥65 is established. (i-3) In a spectral transmittance curve, the difference between a wavelength λ80 with which the transmittance becomes 80% on a shorter wavelength side than the maximum absorption wavelength with the transmittance at the maximum absorption wavelength λmax set to 10% and the maximum absorption wavelength λmax is 65 nm or less.
Public/Granted literature
- US20170066933A1 OPTICAL FILTER AND IMAGING DEVICE Public/Granted day:2017-03-09
Information query
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