Invention Grant
- Patent Title: Near infrared light-cutting optical articles with low residual color
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Application No.: US16347347Application Date: 2017-10-20
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Publication No.: US11124599B2Publication Date: 2021-09-21
- Inventor: Pierre Fromentin
- 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: EP16306443 20161104
- International Application: PCT/EP2017/076915 WO 20171020
- International Announcement: WO2018/082946 WO 20180511
- Main IPC: C08G18/75
- IPC: C08G18/75 ; B29D11/00 ; C08G18/08 ; C08G18/24 ; C08G18/28 ; C08K5/3417 ; C08K5/3437 ; G02B1/04 ; G02C7/10 ; B29K75/00 ; B29K105/00

Abstract:
The present invention relates to an optical article having a substrate made of an optical material comprising a polymer matrix and at least one near infrared absorber, wherein TVIS is higher than or equal to 70%, TNIR is lower than or equal to 85%, TNIR and TVIS being respectively the average optical transmittance in the 780-1400 nm and in the 380-780 nm wavelength range for the optical material through a 2 mm thick layer of said optical material. This optical article can be used to protect from noxious infrared light.
Public/Granted literature
- US20200262967A1 NEAR INFRARED LIGHT-CUTTING OPTICAL ARTICLES WITH LOW RESIDUAL COLOR Public/Granted day:2020-08-20
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