公开(公告)号：US11774636B2

公开(公告)日：2023-10-03

申请号：US17051863

申请日：2019-04-29

Applicant: Essilor International

Inventor： Pierre Fromentin ,  Armel Jimenez ,  Waranya Phompan

IPC: G02B1/04 ,  C08G18/24 ,  C08G18/38 ,  G02C7/04

CPC classification number: G02B1/043 ,  C08G18/242 ,  C08G18/3868 ,  G02C7/04

Abstract: The present invention relates to an optical material cutting blue light, comprising at least one UV absorber that at least partially blocks light having a wavelength ranging from 400 to 450 nm, at least one absorbing dye A having its maximum absorption wavelength in the range from 520 nm to 640 nm, the optical material being made of a material chosen from polythiourethane materials, polyurethane urea materials, materials resulting from the polymerization or copolymerization of polyepisulfide monomers or oligomers, and materials resulting from the polymerization or copolymerization of allylic monomers or oligomers, the optical material having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 6, and a hue angle h higher than or equal to 120° and lower than or equal to 180°, for an optical material thickness of 2 mm.

公开(公告)号：US20180321514A1

公开(公告)日：2018-11-08

申请号：US15773518

申请日：2015-11-06

Applicant: ESSILOR INTERNATIONAL

Inventor： Aude Carrega ,  Armel Jimenez ,  Franck Lestournelle ,  Amélie Kudla

IPC: G02C7/10 ,  G02B1/116 ,  G02B1/16 ,  G02B5/20 ,  G02B5/22 ,  G02B5/28

CPC classification number: G02C7/104 ,  G02B1/116 ,  G02B1/16 ,  G02B5/208 ,  G02B5/223 ,  G02B5/283 ,  G02C7/108

Abstract: The present invention relates to an optical article comprising a substrate with a front main face and a rear main face, having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 7, a relative light transmission factor in the visible spectrum Tv higher than or equal to 87%, blocking at least 8% of light having a wavelength ranging from 420 to 450 nm arriving on said front main face, and having a mean reflection factor Ruv on said rear main face between 280 nm and 380 nm, weighted by the function W(λ) defined in the ISO 13666:1998 standard, lower than 7%, for both an angle of incidence of 30° and for an angle of incidence of 45°. This optical article can be used to protect the eyes of a user from phototoxic blue light and UV light.

公开(公告)号：US20180321513A1

公开(公告)日：2018-11-08

申请号：US15773478

申请日：2015-11-06

Applicant: ESSILOR INTERNATIONAL

Inventor： Aude Carrega ,  Armel Jimenez ,  Franck Lestournelle ,  Amélie Kudla

IPC: G02C7/10 ,  G02B1/115 ,  G02B5/20

CPC classification number: G02C7/104 ,  G02B1/115 ,  G02B1/116 ,  G02B1/16 ,  G02B5/208 ,  G02B5/223 ,  G02B5/28 ,  G02C7/108

Abstract: The present invention relates to an optical article comprising a substrate with a front main face and a rear main face, having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 4, a relative light transmission factor in the visible spectrum Tv higher than or equal to 87%, and blocking at least 8% of light having a wavelength ranging from 420 to 450 nm arriving on said front main face. This optical article can be used to protect the eyes of a user from phototoxic blue light.