Invention Grant
- Patent Title: Optical filter
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Application No.: US15454521Application Date: 2017-03-09
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Publication No.: US10324240B2Publication Date: 2019-06-18
- Inventor: Kazuhiko Shiono , Asana Yoshioka , Shoko Suzuki , 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: JP2014-191601 20140919
- Main IPC: F21V9/04
- IPC: F21V9/04 ; F21V9/06 ; G02B5/08 ; G02B5/20 ; C09B23/10 ; C09B57/00 ; G02B5/22

Abstract:
To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol·cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm: In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R1 is a monovalent hydrocarbon group which may have a substituent, or the like, R2 to R5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.
Public/Granted literature
- US20170184765A1 OPTICAL FILTER Public/Granted day:2017-06-29
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