Invention Grant
- Patent Title: Optical element comprising mix of NIR dyes for broader NIR cut and better aesthetic
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Application No.: US17442473Application Date: 2020-03-23
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Publication No.: US12196989B2Publication Date: 2025-01-14
- Inventor: Pierre Fromentin , Harutsai Waipunya , Haifeng Shan , Hao-Wen Chiu
- Applicant: Essilor International
- Applicant Address: FR Charenton-le-Pont
- Assignee: Essilor International
- Current Assignee: Essilor International
- Current Assignee Address: FR Charenton-le-Pont
- Agency: Norton Rose Fulbright US LLP
- Priority: EP19305371 20190325
- International Application: PCT/EP2020/057975 WO 20200323
- International Announcement: WO2020/193473 WO 20201001
- Main IPC: G02B5/20
- IPC: G02B5/20 ; G02B1/04 ; G02B5/22 ; G02C7/10

Abstract:
Disclosed are optical elements that contains two or more near infrared absorbers and methods of producing the same. Two near infrared absorbers with different near infrared wavelengths absorption ranges and residual colors are mixed with a precursor of an optical substrate. The resulting mixture is subsequently processed to produce optical elements that have a broad near infrared wavelength absorption range and a neutral residual color.
Public/Granted literature
- US20230056732A1 OPTICAL ELEMENT COMPRISING MIX OF NIR DYES FOR BROADER NIR CUT AND BETTER AESTHETIC Public/Granted day:2023-02-23
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