Essilor International

Pierre Fromentin

Tipparat Lertwattanaseri

Aref Jallouli

Haipeng Zheng

Mathieu Feuillade

Sanya Hokputsa

Ronald A Berzon

Haifeng Shan

Francisco De Ayguavives

Robert Alan Valeri

Waranya Phompan

Hao-Wen Chiu

John Biteau

Hélène Maury

Maxime Lecompere

Pierre Leite

Hui Yu

Sunil Madhukar Bhangale

Gregory Hervieu

Armel Jimenez

Thanisararat Saleesung

Prakhar Kasture

Harutsai Waipunya

Supitchaya Iamsaard

David Montoya

Laurie Marion

Heifeng Shan

The invention relates to a polymerizable composition intended to form a polymer composition for an optical material, such as a substrate of an ophthalmic lens, to this polymer composition obtained by polymerizing the polymerizable composition and having a refractive index of from 1.54 to 1.58, to an ophthalmic lens comprising this polymer composition and to a method for manufacturing this optical material. The polymerizable composition has a refractive index of from 1.54 to 1.58, the polymerizable composition comprising: —at least one non-aromatic polyisocyanate compound comprising at least two —NCO groups; —at least one non-aromatic polythiol compound comprising at least two —SH groups; —at least one polyol, According to the invention, said at least one polyol comprises a polyether polyol.

Polymerizable and polymer compositions for an optical material having a refractive index of 1.54-1.58, ophthalmic lens and manufacturing method

The present invention relates to ophthalmic lenses comprising an oxazolone, a preparation method thereof and the use of an oxazolone in an ophthalmic lens to absorb blue light.

Ophthalmic lens comprising an oxazolone

Disclosed is a method for the manufacturing of an optical element having a refractive index above 1.59 by additive manufacturing to the optical element obtained by such a method and to an ophthalmic lens including such an optical element.

Method for the manufacturing of an optical element, optical element thus obtained

The present invention relates to a cross-linkable composition comprising an epoxy oligomer comprising at least six hydroxy groups, to a coating obtained by curing the cross-linkable composition and to an optical lens comprising said coating on a surface thereof, in particular on the edge surface thereof. The invention also relates to a method of preparing a coating for an optical lens and to a method of coating a surface of an optical lens, in particular the edge surface of an optical lens.

Composition for coating the edge of an optical lens

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.

Optical element comprising mix of NIR dyes for broader NIR cut and better aesthetic

Disclosed is a method of manufacturing an ophthalmic lens having at least one optical function, including the determination of a transmission spectrum in a wavelength range from 280 to 2000 nm, the determination of a matrix including at least two compounds absorbing light having a wavelength from 280 to 2000 nm, with regard to the determined transmission spectrum, and additively manufacturing the matrix.

Determining method for an ophthalmic lens with targeted transmission spectrum

The invention relates to an optical article having a substrate made of an optical material comprising a polymer matrix and an improved light transmission in the visible range. The substrate comprises an external layer in which particles are embedded into the polymer matrix, the refractive index of the particles Rbeing lower than the refractive index of the polymer matrix R.

Optical article comprising a substrate with embedded particles for light transmission enhancement

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

An ophthalmic lens comprising a transparent polymer matrix and core shell nanoparticles which are dispersed in the transparent polymer matrix, wherein the core of core shell nanoparticles results from polymerization of a composition comprising nanoparticle core precursors and at least one photochromic compound, and the shell of core shell nanoparticles comprises a mineral compound.

Process for manufacturing light absorbing polymer matrix

The present invention relates to an ophthalmic lens which efficiently absorbs light rays without degradation of the light-absorbing additive, said ophthalmic lens comprising a composite matrix, a catalyst, a UV absorber and at least one light-absorbing additive contained in nanoparticles which are dispersed in said allyl monomer or allyl oligomer.

Composition for the manufacture of an ophthalmic lens comprising an encapsulated light-absorbing additive

Disclosed are polymerizable compositions for ophthalmic lenses. The compositions employ peroxide-based polymerization initiators with decreased capacity for dye degradation. The compositions enable the inclusion of color-balancing dyes, resulting in lenses with improved clarity and color balance.

Optical material with improved colour

The present invention relates to a thermosetting composition for the manufacture of an ophthalmic lens which efficiently absorbs light rays without degradation of the light-absorbing additive, said composition comprising an allyl monomer or oligomer, a catalyst, at least one light-absorbing additive contained in nanoparticles which are dispersed in said allyl monomer or allyl oligomer. The present invention also relates to the use of said composition and to the ophthalmic lens obtained from said composition.

The present invention relates to an ophthalmic lens which efficiently absorbs light rays comprising a composition derived from a monomer or oligomer, a catalyst, at least one light-absorbing additive contained in nanoparticles which are dispersed in said monomer or oligomer.

Ophthalmic lens comprising an encapsulated light-absorbing additive

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 Tis higher than or equal to 70%, Tis lower than or equal to 85%, Tand Tbeing 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.

Near infrared light-cutting optical articles with low residual color

The present invention relates to an eyeglass lens comprising a substrate made of an optical material comprising a polymer matrix and at least one 2-(2-hydroxy-5-R-phenyl)benzotriazole, in which Ris a resonant group, the optical transmittance through a 2 mm thick layer of said optical material being lower than 1% for each light wavelength ranging from 280 to 405 nm. This eyeglass lens protects from phototoxic blue light and UV light.

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Bangkok, Thailand

Pierre Fromentin