Invention Grant
- Patent Title: Near infrared absorbing dye, optical filter, and imaging device
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Application No.: US16747589Application Date: 2020-01-21
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Publication No.: US11384246B2Publication Date: 2022-07-12
- Inventor: Shigeki Hattori , Satoshi Okada
- 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: JPJP2017-145163 20170727
- Main IPC: G02B5/20
- IPC: G02B5/20 ; G02B5/28 ; C09B23/16 ; G02B5/22

Abstract:
A near infrared absorbing dye includes a croconium-based compound shown in formula (AI). In formula (AI), ring Z is either an optionally substituted 6-membered ring including no heteroatom or an optionally substituted 5-membered ring including 0 to 3 heteroatoms in the ring, R1 and R2, R2 and R3, and R1 and a carbon atom or heteroatom as a part of ring Z may be linked to each other to respectively form a heteroring A, a heteroring B, and a heteroring C together with a nitrogen atom.
Public/Granted literature
- US20200148884A1 NEAR INFRARED ABSORBING DYE, OPTICAL FILTER, AND IMAGING DEVICE Public/Granted day:2020-05-14
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