Essilor International

Armel Jimenez

Pierre Fromentin

Waranya Phompan

Aude Carrega

Franck Lestournelle

Amélie Kudla

Amelie Kudla

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&#xb0; and lower than or equal to 180&#xb0;, for an optical material thickness of 2 mm.

Blue light cutting optical material having a bluish appearance

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.

Optical article protecting from blue light

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Charenton-le-Pont, France

Armel Jimenez