Abstract: A method of calculating a shaping setpoint for an ophthalmic lens along a longitudinal profile includes: an operation of acquiring an initial longitudinal profile; an operation of centering the initial longitudinal profile on the lens; an operation of searching for two remarkable points of the initial longitudinal profile as a function of determined criteria; an operation of calculating a modified axial coordinate for each remarkable point in order to ensure proper mounting and esthetic appearance of the lens in its eyeglass frame; and an operation of calculating a final longitudinal profile resulting from a transformation of the initial longitudinal profile that is such that the final longitudinal profile passes through the two remarkable points.

Abstract: A temporary suspension element comprises a rectilinear guide with a threaded end, and a catch which can swing between a guiding position and a retaining position. The element can temporarily replace screws that attach a structure under a support, during the attachment or disassembly of said structure. The attachment and the disassembly of the structure can then be performed by a single operator.

Abstract: An acrylate-based optical coating composition containing a blend of monomers, a metal salt, a Hindered Amine Light Stabilizer (HALS), an antioxidant (AO), an initiator and a photochromic dye. The initiator has a range of free radical energy that is below a predetermined level. The cure process is controlled by the catalyst and initiator in combination with the HALS and AO to avoid deleterious reactions that can increase yellowness. The composition is well suited to be applied to a lens and cured in the mold to form a coating with reduced yellowness having high adhesion and abrasion-resistant properties. A photochromic segmented bifocal lens is produced with low photochromic fatigue and favorable % T values.

Abstract: A process for applying a film structure onto a lens blank is improved by implementing a wedge piece when the film structure is pressed against the lens blank using a resilient cushion. The wedge piece forces the film structure to conform more tightly to the lens blank within a depression track existing on said lens blank. Then, the lens blank assembled with the film structure has a final optically useful area which is increased.

Abstract: A method includes: a) defining position-identification elements for identifying the position of a first frame of reference associated with a wearer's head in a second frame of reference associated with an image-capture device and for identifying the angle of inclination of the first frame of reference in the sagittal plane of the wearer's head about a center of rotation of the head; b) capturing a series of at least two images of the wearer's head; c) determining, in the second frame of reference, a position of the center of rotation; d) identifying, in each image, the image of a first anatomical point of the wearer's face; e) determining, in each image, the angle of inclination relative to a reference plane of an anatomical plane that is perpendicular to the sagittal plane and that contains the center of rotation and the first anatomical point; f) comparing the angle with a predetermined value; and g) determining the geometrical-and-postural parameter as a function of the comparison.

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: The present invention relates to a method for making a device provided with at least one closed enclosure filled with at least one liquid and closed with at least one flexible membrane based on an elastic material, comprising the steps of: a) depositing on a support (100) at least one given material in liquid form, b) at least partly solidifying said given material (130), c) depositing at low pressure an elastic material onto said solidified material so as to form a membrane, the membrane and the support forming at least one closed enclosure filled with said given material, d) melting said given material (130), so as to again liquefy said given material in the closed enclosure.

Abstract: An optical-grade surfacing tool includes: a rigid holder (60); an elastically compressible interface (12) secured to the rigid holder (60); and a flexible pad (13) that can be applied against a surface to be machined (71) and secured to the interface (12) opposite the rigid holder (60). The pad (13) is carried by an elastically extensible membrane (14) including: a central plate (15); and a plurality of straps (18) each radially protruding from the periphery of the plate (15) and each having a distal portion engaged with a fastening element (38), each strap (18) rotating about the side surface (28) of the interface (12) and extending up to the fastening element, each strap (18) being taut.

Abstract: A method makes a customized progressive ophthalmic lens intended for an identified wearer that includes measurements of the inclination of the wearer's head. These measures are made when the wearer performs visual tasks in far-vision conditions, by consecutively looking horizontally, then towards the ground. A variation of the optical power of the progressive lens, below a reference direction for the far vision, is adjusted on the basis of the measure results. The habituation period of the wearer to the progressive lens can thus be reduced.

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: The machine includes: elements for supporting the lens and for driving it in rotation about a first axis of rotation, the rotation of the lens being driven by first driver element, a tool-carrier mounted to turn about a second axis of rotation, turning of the tool-carrier being driven by second driver element, a plurality of working tools mounted on the tool-carrier to rotate about tool axes, with at least two of the tools including tools for shaping the periphery of the lens for shaping having distinct tool axes, third driver element for driving relative spacing movements between the first axis of rotation and the second axis of rotation, swivel elements for enabling the tool-carrier to be pivoted relative to the first axis of rotation about a third axis of rotation that extends substantially transversely to the first axis of rotation.

Abstract: The invention relates to a lens having certain properties, including: a circle grouping together all the points of the lens having the same abscissa and the same ordinate as points located on a circle in the reference plane, having a diameter of 35 millimetres and centred on a point located 8.5 millimetres below the mounting cross and horizontally offset on the nasal side by 1.25 millimetres; a disc grouping together all the points of the lens having the same abscissa and the same ordinate as points located inside said circle; a progression length of less than 14.5 millimetres; a ratio difference between the value of the cylinder and the surface addition of less than 0.

Abstract: The shaper device for shaping an ophthalmic lens comprises a blocking support on a blocking axis, a shaper tool, an electronic or computer unit for controlling the position of said shaper tool, and a man/machine interface connected to said electronic or computer unit, and comprising a display screen (253) and input means for inputting numerical values.

Abstract: The invention relates to a method of calculating an optical system (OS), the optical system (OS) being identified by a function (OF), the optical system (OS) comprising a first part (F1) defined by a first equation (EF1) and a second part (F2) defined by a second equation (EF2), the method comprising: —a generating step (GEN), in which a virtual optical system (VOS) is used to generate a virtual function (VOF); —a modification step (MOD), in which the virtual function (VOF) is modified so as obtain the function (OF); —a calculation step (CAL), in which the second equation (EF2) is calculated from the function (OF), and the first equation (EF1). The invention relates also to a method of manufacturing an optical system (OS).

Abstract: A naphthopyran compound represented by the formula (I) wherein: n1, n2, p, m and q represent an integer; R1, R2 and R4, represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, —CO2Ra1, —OC(O)—Rd, —X—(Re)—Y, linear or branched (C1-C18) perfluoroalkyl group, wherein Ra, Ra1, Rb, Rc, X, Y, Re, and Rd are as defined in the description; Z represents a group selected from CO, CS, SO, SO2, CO2, C(O)S, CS2, C(O)NH, C(O)NRa, C(S)NH, C(S)NRa and C?NRa; R3 represents a group selected from halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R6 represents a group selected from —Ra which may be optionally substituted, linear or branched (C1-18) perfluoroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl, which may be optionally substituted; R5 represents a group selected from: halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, —O—C(O)—Ra and —CO2Ra1; or when q is equa

Abstract: A method of simulating an optical effect of an optical lens for a potential wearer, the method comprising: using a first camera to take a first image of a scene through a first optical lens, the first optical lens having optical characteristics according to a first ophthalmic lens design, the first camera being provided with optics arranged to simulate the optical characteristics of a human eye; and displaying the first image on a display device for viewing by the potential wearer enabling the potential wearer to visualise the optical effects of the first optical lens on his viewing ability. The position of the first camera, the first optical lens and the display device are fixed with respect to a referential frame defined by the head of the potential wearer, the head of the potential wearer being movable with respect to the scene.

Abstract: A process for producing a curved substrate (20) covered with a film (10) comprises a heat treatment of the film performed between a step of preforming said film and a step of assembling the film with the substrate. A maximum temperature of the pre-assembling heat treatment is higher than another maximum temperature of a post-assembling heat treatment (F) which is performed after the assembling step. Then the assembly of the substrate (20) with the film (10) is not altered during said post-assembling heat treatment. In particular, no defect and no delamination appear, and no change in the curved shape of the substrate is caused by the post-assembling heat treatment, even if the substrate (20) has a low glass transition temperature.

Abstract: Method of shaping an ophthalmic eyeglass lens presenting two main optical working faces and including firstly a substrate made of a first material and presenting two main faces corresponding to the two main faces of the lens, and secondly at least one coating film made of a material distinct from that of the substrate, the coating film being previously secured on at least one of the main faces of the substrate, includes: cutting the lens by machining with a first tool over at least the thickness of the previously secured coating film, to define internally a working central portion of the coating film that presents a reduced outline; trimming the edge face of the substrate along the desired outline by machining with a second distinct tool, without machining the working central portion; and finishing the edge face of the substrate without machining the working central portion.

Abstract: The present invention relates to an article having at least one surface, wherein said surface is at least partially coated with a ultra high hydrophobic film having a surface roughness such that the film exhibits a static water contact angle at least equal to 115°, preferably 120°, even better 125°, and wherein said film is a nanostructured film comprising a first layer comprising nanoparticles bound by at least one binder adhering to the surface of the article, and a second layer of an anti-fouling top coat at least partially coating said first layer. The present invention also concerns a process for preparing the above article.

Abstract: A preparation method includes: acquiring a frame of reference of ophthalmic lens defined at least by a first centering point and by a first orientation direction; acquiring a frame of reference of the rim of the eyeglass frame defined at least by a second centering point and a second orientation direction; acquiring a longitudinal profile representative of the shape of the rim and identified in the frame of reference of the rim; acquiring a curvature parameter or a curvature compensation parameter relating to the camber of the eyeglass frame; and putting the two frames of reference into coincidence, by positioning the two centering points relative to each other and by orienting the two orientation directions relative to each other as a function of the curvature parameter or the curvature compensation parameter so as to define the position and the orientation of the longitudinal profile in the frame of reference of the ophthalmic lens.