Essilor International

Essilor International (compagnie Generale D'optique)

Haifeng Shan

Aref Jallouli

Hao-Wen Chiu

Hao Wen Chiu

Richard Muisener

Elliot French

Peiqi Jiang

Haipeng Zheng

Pierre Fromentin

Steven Weber

Gilles Baillet

Gerald Fournand

Zeming Gou

William Trottier-lapointe

Philip Miller

Aude Lapprand

Marvin Pounders

Robert Rist

Charlène Pousse

Jean-Philippe Dumont

Rick Muisener

Srini Balasubramanian

Bill Houle

Jinhhao Ng

Harutsai Waipunya

Philip Chang

A method of manufacturing an optical lens (), comprising: obtaining (S) a transparent thermoplastic (TP) carrier () with at least one smooth surface; printing (S), via a 3-D printer on the side opposite to the at least one smooth surface of the transparent TP carrier (), at least one transparent layer () using a thermoplastic filament (), each transparent layer () having a predetermined light filtering property, thereby forming a functional layer (); and performing (S) an injection over-molding process () to fuse bond the functional layer () to a thermoplastic substrate thereby forming the optical lens, wherein the at least one smooth surface of the transparent TP carrier () forms a smooth surface of the manufactured optical lens ().

Functional wafers by 3D printing

Disclosed are optical elements and the methods of producing the same. The optical element contains two or more near infrared absorbers mixed in an optical substrate, and one or more functional film disposed on the optical substrate. The method of producing the optical element comprises mixing two near infrared absorbers with different near infrared wavelengths absorption ranges and residual colors with a precursor of an optical substrate. The mixture is subsequently processed to produce an optical element that has broad near infrared wavelength absorption range, a high near infrared absorption level, and/or homogeneous color distribution.

Polarized lenses comprising mix of NIR dyes for broad NIR protection

The disclosure includes core-shell filament composition for additive manufacturing of ophthalmic lenses and ophthalmic lens components. The disclosure also includes a set of criteria for selecting core and shell thermoplastic combinations that exhibit high optical clarity, improved filament inter-strand diffusion, high inter-strand adhesion, and improved manufactured part strength when used in an additive manufacturing method like fused deposition modelling.

FDM 3D printing of optical lens with high clarity and mechanical strength

Disclosed herein is an injection molding method for making optical thermoplastic lenses using 3D—printed functional wafers. The method employs a variable injection molding cavity temperature that is heated to at least wafer Tg—10° C.

Injection overmolding with heat/cool cycling for making optical lenses using 3D-printed functional wafers

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

The invention concerns method and system for determining a lens of customized color, said method comprising the steps of determining a target colorimetric data set; providing access to a database comprising data representing colors; using a plurality of simulation modules to calculate, based on said data from the database, a plurality of simulated colorimetric data of the lens substrate combined with a mixture of dyes of determined dye(s) combination, composition and amount or with a multilayer stack as a function of determined layers composition and thicknesses; and, color matching the plurality of simulated colorimetric data with the target colorimetric data set so as to determine one or a plurality of combinations of said lens substrate with a determined mixture of dyes or with a determined multilayer stack.

Method and system for determining a lens of customized color

Embodiments of the disclosure relate to a series of PC resin additives for maintaining the color stability and blue-cut performance during injection molding. The additives may be used to adapt a PC resin customarily used for sun protection lenses for clear lens applications.

Polycarbonate resin compositions with consistent color and stable blue-cut performance

Optical polymeric sheets with specific ranges of optical retardation, elastic modulus, and Shore A hardness were used to construct flexible polar patches. The polar patches conform to non-polarizing lenses of various diopter bases and provide polarizing efficiency that is comparable to regular polarizing lenses.

Temporary polar patches

The combination of selective and high pass filters to cut harmful blue light allowed to achieve the best compromise between high blue cut performance, high UV cut and low yellow index, not achievable when using the filters alone.

Optical article with blue cut, high UV cut and high clarity

Disclosed are polarized films containing specific light filters that block transmission of harmful electromagnetic radiation. Also disclosed are methods of producing said films as well as ophthalmic lenses having increased eye health.

Polarized films with specific light filters

A blue-cut wafer can be coupled to a lens, such that the blue-cut wafer can be configured to reduce by absorption at least a portion of light having a first wavelength range from 400 nanometers to 500 nanometers, preferably from 400 nanometers to 460 nanometers. The blue-cut wafer can permit light having a second wavelength range, the second wavelength range being greater than the first wavelength range, and homogenize a color appearance and a blue-cut performance level of the blue-cut wafer based on the blue-cut wafer having a maximum thickness and a minimum thickness within twenty percent of a nominal thickness of the blue-cut wafer.

Apparatuses and methods for blue-cut lenses

The invention concerns an optical lens comprising (i) a temporary coating at least partially covering a surface of the lens, said temporary coating comprising an outermost layer mechanically degradable through friction and/or contact; (ii) a removable film having opposite first side and second sides which adhere to said outermost layer through its first side, wherein&#x2014;the first side of the film has a roughness Rq lower than 750 nm and the first side of the film has a surface energy lower than 38 mJ/m.

Optical lens comprising a protective removable film

The present invention relates to a transparent optical article (e.g. an ophthalmic lens) comprising a thermoplastic substrate and a dye at least partially inhibiting light having a wavelength ranging from 400 to 460 nm and an optical brightener for at least partially balancing the color imparted to the transparent optical article by the dye, wherein said optical brightener emits light by fluorescence at a wavelength ranging from 400 to 460 nm and is incorporated into a layer fused or bonded to the thermoplastic substrate. Said optical brightener allows for perception of said optical article as less yellow, and even colorless, to a user or to an observer. In addition, the UV-absorbers that may be present in the thermoplastic substrate do not negatively interact with the optical brightener.

Transparent optical article having a reduced yellowness appearance

A transparent optical element with dual light-polarizing effect comprises a first film forming a linear light-polarizer in a first surface portion of the element, and a second film forming a retarder plate within a second surface portion. The second surface portion is contained in the first surface portion. Such element may form an eyeglass adapted for providing stereoscopic vision by light polarization selection in the second surface portion, while providing protection against excessive light intensity in the first surface portion.

Transparent optical element with dual light-polarizing effect

The present invention is drawn to a process of drilling organic glasses. The process comprises (a) providing an organic glass substrate; (b) providing onto at least one surface of said organic glass substrate optionally via an adhesive layer selected from the group consisting of pressure sensitive adhesives and hot melt adhesives, a polymer film having an elastic modulus of equal to or less than 3 GPa in at least one direction and a E*hequal to or more than 3.5 N in at least one direction, E and h being respectively the elastic modulus and the thickness of the thermoplastic polymer film; and (c) drilling a hole through the organic glass substrate and polymer film by means of a drill.

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Shrewsbury, MA, United States of America

Haifeng Shan