Abstract: The machine for coating an optical article with a predetermined coating composition, includes a vacuum chamber (8) having an interior space (31) configured to receive the optical article, a vacuum pump (20) connected to the vacuum chamber (8), a nebulizer (40) configured to carry out a vacuum nebulization treatment of the composition for depositing it on the optical article in the vacuum chamber, and a control unit (2) configured to control the vacuum pump; the control unit being configured to cause the vacuum pump to suck gases from the vacuum chamber to bring it to a predetermined required pressure for the vacuum nebulization treatment, and the control unit and the nebulizer are configured to nebulize the predetermined coating composition which is liquid into a mist of aerosol droplets and to direct the droplets towards at least a surface of the optical article.

Abstract: The present invention relates to a curable composition providing upon curing a transparent antistatic coating comprising a silica organosol, a salt comprising an alkali cation and a Bronsted acid. The invention further relates to optical articles comprising a substrate at least partially coated with a transparent antistatic coating formed by depositing onto substrate and curing the above curable composition. The obtained optical articles exhibit enhanced antistatic properties, high optical transparency, low haze and good mechanical properties, in particular a good abrasion resistance.

Abstract: Ophthalmic lens having a first surface comprising a zone of optical interest, the zone of optical interest comprising at least: a far vision control point (FV), a near vision control point (NV), a main line (M) starting from one end of the zone of optical interest, ending on the opposite end of the zone of optical interest and passing through the far and near vision control points, wherein the main line (M) comprises at one end a first section (S1) of continuous increase of mean sphere, at the other end a second section (S2) of continuous increase of mean sphere, the first and second section being separated by a third section (S3) of stabilized mean sphere.

Abstract: Method for determining, in a natural posture, at least one geometric/physiognomic parameter associated with the mounting of an ophthalmic lens in a spectacle frame intended to be worn by a wearer. The method includes: (a) capturing at least one substantially frontal image of the wearer's head; (b) determining a measured value of an angle of inclination during the capturing step, which depends on the inclination of the wearer's head about a main axis perpendicular to a sagittal plane of the wearer's head; (c) determining a reference value of the angle of inclination corresponding to a natural posture of the wearer's head; and (d) determining the required geometric/physiognomic parameter on the basis of the substantially frontal image captured and as a function of the difference between the measured value of the angle of inclination determined in step (b) and the reference value of the angle of inclination determined in step (c).

Abstract: A device for measuring a characteristic reading distance of an individual, includes a measurement support carrying at least one ultrasound emitter member and at least one ultrasound receiver member, at least one of these members, referred to as a main measurement member, possessing a measurement axis on which emission or reception by the main measurement member is privileged, and being suitable for emitting or receiving ultrasound propagating in a measurement cone centered on its measurement axis. The device further includes an electronic processor unit adapted, as a function of the ultrasound signal received by the receiver member, to deliver a signal representative of the distance between the measurement support and an eyeglass frame worn by the individual's head, and to deduce therefrom the characteristic reading distance, and elements to verify that the eyeglass frame is situated at least in part in the measurement cone of the main measurement member.

Abstract: The present invention is dedicated to a method for the manufacture of an optical article comprising the following steps: providing a substrate having two main faces and bearing —OH functions on at least one of its faces, successively exposing one face of the substrate bearing —OH functions to at least 2 distinct materials named M1 and M2, M1 having a weight average molecular weight higher than M2, in a vacuum chamber under conditions resulting in the deposit of those materials on the surface of the substrate, and wherein: M1 is a substituted silane comprising: at least one function X1 bonded to a silicon atom, wherein the Si—X1 group is capable of forming a covalent bond with a —OH group of the substrate and/or a covalent bond with M2, and at least one fluorine containing group, M2 is a substituted silane having a number average molecular weight inferior or equal to 900 g/mol, comprising: at least one function X2 bonded to a silicon atom, wherein the Si—X2 group is capable of forming a covalent bond with a —O

Abstract: A laminated optical lens having an edging-optimized laminar configuration and method for manufacturing same. The laminated optical lens includes an optical base lens and a film layered structure including an external film furthest from said lens. An adhesive layered structure is placed between the film layered structure and the optical base lens so as to permanently retain the film layered structure on the surface of the optical base lens. The laminated lens is manufactured by laminating a film layered structure having an external film to an optical base element with an adhesive layered structure. The external film has a thickness of at least 100 ???, and preferably a thickness in the range of 150 microns to 300 microns inclusive.

Abstract: The present invention pertains to a method for producing a colloidal suspension of zirconia particles, comprising the following successive steps: a) subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150° C., so as to obtain a suspension in the form of a two-phase mixture comprising a slurry and a supernatant, b) without first peptizing it, desalting said suspension so as to form a colloidal suspension of zirconia.

Abstract: Method of manufacturing an optical lens, the method comprising: a lens member providing step (S1) during which a lens member comprising a first surface and a first reference system identified by first markings on the first surface is provided, a surface data providing step (S2) during which surface data corresponding to a second surface and the position of the second surface relative to the first surface of the optical lens are provided, a blocking and machining step during which the lens member is blocked and the second surface is machined, a second markings providing step during which second markings identifying a second reference system of the second surface are provided, a comparison step during which the relative positions of the first and second surfaces are compared.

Abstract: Curable composition providing, upon curing, an abrasion resistant, transparent, antistatic coating comprising: a) at least one conductive polymer, b) colloidal particles of at least one non-conductive oxide, c) at least one binder comprising at least one epoxysilane having at least two hydrolysable groups directly linked to the Si atom of the epoxysilane, and/or its hydrolysis product, said at least one conductive polymer and said colloidal particles of at least one non-conductive oxide being substantially not agglomerated, the content of said conductive polymer in the dry extract of said curable composition ranging from 0.1 to 10% by weight, preferably from 0.2 to 10% by weight and the content of the dry extract of said at least one epoxysilane in the dry extract of said curable composition ranging from 20 to 80% preferably 25 to 60% by weight based on the total weight of the dry extract.

Abstract: A method of deblocking a lens component (1) fixed on a thermoplastic block (2) of an ophthalmic lens block comprising the steps of: a) applying a pushing strain on the surface (14) of the lens component fixed on the thermoplastic block; b) providing a warm gas flow at the interface between the lens component (1) and the thermoplastic block; and maintaining the pushing strain during the step of providing the warm gas flow at the interface between the lens component and the thermoplastic block, wherein the stress applied to obtain the pushing strain of step a) is greater or equal to 0.1 MPa and/or less or equal to 1 Mpa, and wherein the temperature of the warm gas flow of step b) is greater or equal to 30° and/or less or equal to 70° C.

Abstract: The invention relates to a method of determining an ophthalmic lens for a wearer's eye, the method comprising the following steps: measurement, on the wearer in binocular vision, of the three-dimensional coordinates of the centre of rotation (COR) of the wearer's eye; measurement (10) of at least one viewing direction in a natural posture; determination of the desired position of the ophthalmic lens; calculation of the characteristics of the ophthalmic lens using the measured coordinates and the determined position and the measured direction in the natural posture. Measuring the position of the centre of rotation of the eye in binocular vision ensures that the lens obtained is best adapted for the wearer.

Abstract: A lens blocking/deblocking method/device to adhere an ophthalmic lens to a lens holding block A method for blocking an optical lens component (100) on holding unit (200) having bottom part (230) inserted and fixed in lens machining tool (400) and an upper part (250) having upper assembling surface (210) and external side parts (241).The method provides the optical lens component (100) with layer (320) of one-side adhesive tape arranged on bottom of component (100) to cover at least partially bottom (120); (S20) providing thermoplastic material on upper assembling surface (210). The thermoplastic material is heated where a part thereof flows under moderate pressure; (S30) placing the optical lens (100) with layer (320) on thermoplastic material when the thermoplastic is softened; (S40) applying pushing force (P1) on the optical lens (100), to spread the thermoplastic between layer (320) and upper assembling surface (210) and covers external side parts (241).

Abstract: Method for converting a composition into thermoplastic polyurethane, said composition comprising polyurethane resin, said method comprising the steps of combining the composition with a chemical compound, and converting said mixture into thermoplastic polyurethane, characterized in that said chemical compound is 1,4-Di(2,6-dibromo-4-methylphenylamino)anthracene-9,10-dione. Article obtained according to this method.

Abstract: A method cuts a patch to be applied onto a curved substrate and includes the preliminary calculation of curvilinear lengths on the substrate between a reference point and a peripheral edge of said substrate. The calculated lengths are applied to a planar film for making the patch, and then the patch is cut by connecting the ends of the applied lengths. The patch then precisely coincides with the edge of the substrate. Such a method is particularly useful for applying a functional film onto a spectacle lens, as a trimming of the lens after the film is assembled with the lens would degrade said film.

Abstract: A linear fluidic actuator comprising an upper actuation deformable surface suitable to induce a displacement in an actuation direction L and a wall delimiting an internal cavity wherein the shape of the actuator is a pillar; the wall, the cavity and the upper surface of a base form the lower part of said pillar, where h1 is the highest dimension of the internal cavity at rest according to the actuation direction L; a part forms the upper part of said pillar where the upper surface of said upper part is the upper actuation deformable surface, the bottom surface of said upper part closes the upper part of the cavity so as to form an upper surface of said cavity and where h2 is the distance at rest from the top of the upper surface of the internal cavity to the upper actuation deformable surface; the height ratio h1/h2 is comprised between 0.2 and 10; a fluidic inlet is provided and suitable for introducing a fluid in the internal cavity.

Abstract: A method of preparing a transparent polymer material includes i) obtaining composite nanoparticles having mineral nanoparticles at least partially coated with at least one monomer and/or at least one polymer suitable for promoting physicochemical interactions at the interface between the mineral nanoparticles and a thermoplastic polycarbonate matrix, the mineral nanoparticles being surface-modified by the monomer and/or the polymer, either directly by grafting or directly by adsorption of the monomer and/or polymer onto the surface of the mineral nanoparticles; or via a coupling agent selected from a chlorosilane or an organosilane including a functional group that is capable of reacting by a radical pathway. The composite nanoparticles obtained in step i) are mixed with the thermoplastic polycarbonate matrix in the molten state to obtain the transparent polymer material.

Abstract: Method of producing a thermoplastic polyurethane having a light stabilization useful for ophthalmic applications, comprising combining precursors of a polyurethane and at least one antioxidant, and incorporating therein, either before, during or after polymerization, at least one light stabilizer, said method being characterized in that the antioxidant is benzenepropanoic acid, 3(1,1-dimethylethyl)-4-hydroxy-5-methyl-1,1?-[1,2-ethanediylbis(oxy-2,1-ethanediyl)]ester and the light stabilizer is bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate together with at least one additional component chosen from among phenol, 2-(5-chloro-2H-benzotriazole-2-yl)-6-(1,1-dimethylethyl)-4-methyl and 2,2?-methylenebis(6-(2H-benzotriazol-2-yl)-4-1,1,3,3-tetramethylbutyl)phenol).

Abstract: A lens (1) includes a plurality of optical surfaces (S1, S2) each of which is made up of an alternation of active zones (ZA1, ZA2) and separation zones (ZS1, ZS2). The active zones of one of the surfaces are situated beside the separation zones of the other surface. The shape of one at least of the optical surfaces is then adapted into the separation zones in order to augment the acute angles that are situated at the convergence of active zones and separation zones. The lens can thus be made with improved accuracy with respect to a target optical function.