Abstract: The device includes receiver elements (121, 114) for receiving the ophthalmic lens; on either side of the receiver elements, firstly lighting elements (S) for illuminating the ophthalmic lens (103) installed on the receiver elements, and secondly acquisition elements (122, 125, C) for acquiring the shadow of the ophthalmic lens illuminated by the lighting elements (S); measurement elements (S, 124, C) suitable for measuring the optical deflection power exerted by the ophthalmic lens on at least one light ray and for delivering a signal representative of the deflection power; and an electronic and computer system including geometrical correction calculation instructions for deducing from the measured deflection power a corrected shape for at least a portion of the shadow of the ophthalmic lens as perceived by the acquisition elements (122, 125, C).

Abstract: The invention provides lenses produced by the adding of two or more surfaces, in which lenses both the length of the corridor is shortened and the maximum unwanted astigmatism is reduced.

Abstract: The present invention relates to a process for transferring at least one coating onto at least one geometrically defined surface of a lens substrate to produced a lens substrate coated with at least one functional coating adhering to at least one geometrically defined surface through a layer of transparent adhesive composition.

Abstract: An optical surface-finishing tool includes a rigid support (4) having a transverse end surface (13); an elastically-compressible interface (5) which is applied against the end surface (13) such as to cover same; and a flexible buffer (6) which can be applied against the optical surface (2), which is applied against the interface (5) and which covers the interface at least partially, opposite and in line with the end surface (13). The buffer includes a central part (6a) which is in line with the end surface (13) and a peripheral part (14) which extends transversely beyond the end surface (13). There is also an elastic return element (15) having a collar (18) which is used to connect the peripheral part (14) to the support (4). Moreover, the collar (18) includes a continuous peripheral part (22) which rests on the peripheral part (14) of the buffer (6) such as to co-operate therewith.

Abstract: A device (100) enabling automatic detection of the index marks of an ophthalmic lens (10), includes a support (110) which is adapted in such a way as to receive the lens, and, on each side of the support, first elements (120) for the illumination of the ophthalmic lens installed on the support, and first elements (130) for analysis and acquisition of the light transmitted by the lens. The device also includes an activatable and deactivatable pattern filter (140) arranged between the first illuminating elements and the support.

Abstract: This invention relates to a method for preparing a photochromic latex, photochromic thin films obtained therefrom, and articles coated with such thin films, in particular photochromic ophthalmic lenses.

Abstract: The invention concerns a process for replacing an initial outermost coating layer of a coated optical lens with a layer of a new final coating having surface properties different from those of said initial outermost coating which comprises: (a) providing a coated optical lens having an initial outermost coating layer having a surface contact angle with water of at least 65°; (b) subjecting the initial outermost coating layer to a treatment with activated chemical species at about atmospheric pressure, and for less than one minute, in order there is obtained a treated surface having a contact angle with water of 10° or less; and (c) depositing on said treated surface a layer of a final coating having surface properties different from those of said initial outermost coating.

Abstract: The lens presents horizontal prismatic refractive power that varies progressively along the main progression meridian (MM?) with the addition of horizontal prismatic power being greater than 2 prismatic diopters in absolute value, this addition of horizontal prismatic power being defined by the difference between the horizontal prismatic refractive power at the reference point (L) of the far vision zone and the horizontal prismatic refractive power at the projection point (P?) of the reference point (P) of the near vision zone (VP) on the vertical line passing through the reference point (L) of the far vision zone.

Abstract: A method of trimming a lens held between two clamping pads, and the lens periphery is ground away following a controlled trajectory having a programmed terminal portion that corresponds to the desired lens shape, which includes the method comprising: while in a lightly clamped condition, taking first measurements of a plurality of points belonging to a face of the lens and measuring the coordinates of points forming the trace of the rim on the face; while in a tightly clamped condition, taking second measurements of another plurality of points of the face of the lens; making an approximate mathematical representation of the face of the lens for each of the two clamping conditions; and calculating the coordinates of the deformed outline of the lens on the face in the second clamping condition in order to correct the programmed terminal portion of the grinding trajectory.

Abstract: The subject of the invention is a method for determination by optimization of an ophthalmic lens for a wearer for whom a power addition has been prescribed. The method proposes using as a target for the optimization of the lens, under wearing conditions, a difference of the mean orientation of the axes of resulting astigmatism to the vertical of less than 2.5° in a first control zone delimited by an ellipse centred on the progression meridian at half height between the fitting cross and the near vision reference point, said ellipse having a major axis greater than 35° and a minor axis comprised between 3.8° and 4.5°. The invention allows improvement in the performances of the progressive multifocal lenses in intermediate vision.

Abstract: The invention concerns a photocurable adhesive composition comprising, based on total weight of photopolymerizable monomers and/or oligomers of the composition: 5 to 60 wt % of at least one mono or polyacrylate monomer or oligomer thereof (A); 5 to 50 wt % of at least one thio(meth)acrylate monomer or oligomer thereof (B); and 20 to 50 wt % of at least one aromatic dimethacrylate monomer or oligomer thereof (C); with the proviso that the composition does not contain a brominated monofunctional acrylate.

Abstract: Device comprising in combination: elements for detecting (4) characteristics of a lens; elements for integrating characteristics representing a patient's morphology; a support (3) of the mobile lens along a predetermined trajectory between a first measuring position and a loading position; grinding elements (20); and elements forming a gripping and clamping clip (25) for transporting the lens from the loading position to the grinding position.

Abstract: This invention relates to a method for preparing a photochromic latex, photochromic thin films obtained therefrom, and articles coated with such thin films, in particular photochromic ophthalmic lenses.

Abstract: The invention concerns a method which consists in irradiating at least one face of the article with UV radiation, causing the article to be photodegraded over a thickness of at least 1 ?m, and in contacting the irradiated face of the article with a colouring agent so as to diffuse the colouring agent in the entire thickness of the photodegraded surface layer of the article. The invention is useful for optical and ophthalmologic articles.

Abstract: Systems for transferring at least one coating from a carrier to a surface of an optical article which comprise: an optical article to be coated; a flexible carrier bearing at least one coating to be transferred; an inflatable membrane; and a deformable part that is able to match the geometry of a surface of the optical article when a pressure is exerted on the optical article through inflation of the inflatable membrane. Also describes are methods and processes of using such systems; carriers for use in such systems, methods, and processes; and optical articles made using such systems, methods, and processes.

Abstract: Systems for transferring at least one coating from a carrier to a surface of an optical article which comprise: an optical article to be coated; a flexible carrier bearing at least one coating to be transferred; an inflatable membrane; and a deformable part that is able to match the geometry of a surface of the optical article when a pressure is exerted on the optical article through inflation of the inflatable membrane. Also described are methods and processes of using such systems; carriers for use in such systems, methods, and processes; and optical articles made using such systems, methods, and processes.

Abstract: An inflatable membrane pressing apparatus for a film or coating application or lamination process comprising: a support; an inflatable membrane device comprising a pressurized fluid accumulator a face of which is partly formed by an inflatable membrane; a holding frame; and a pressure release valve for controlling the pressure of pressurized fluid within the accumulator during use; wherein, during use, pressurized fluid is introduced and released from the fluid accumulator to inflate and deflate the membrane. Also decribed are methods and processes of using such an apparatus and articles made using the apparatus.

Abstract: The optical system presents accommodation compensation, the system including in combination two multifocal lenses, one of them being an aperture lens and the other a field lens.

Abstract: A substrate having at least one main surface comprising a first coating deposited on said main surface and a second coating having anti-soiling properties deposited and adhering on the surface of said first coating, the first coating being a (meth)acrylate based coating and being obtained by polymerizing a polymerizable composition comprising: i) at least one (meth)acrylate compound and ii) at least one compound I having at least one—M-Z? bond with M representing Si or a Metal atom, Z? representing OH or a hydrolysable group, and at least one ethylenic unsaturated group or epoxy group, and/or iii) at least one silica or metal oxide colloid having free ethylenically unsaturated groups; and the second coating, having anti-soiling properties, being obtained by depositing on said first coating an anti-soiling coating composition comprising at least one compound II, or a hydrolyzate thereof, having at least one—Si-Z? group with Z? representing OH or a hydrolysable group.

Abstract: Disclosed is a polarization splitter in which reflection for the S polarization is locally centered on at least one emission peak of the image-emitting source of a micro-display or in which reflection for the S polarization is locally centered on at least one peak corresponding to a wavelength selected from red, green and blue. Also disclosed are applications to an ophthalmic lens incorporating inserts for projecting an image towards the user.

Abstract: Non-releasable, molded, large-diameter, corrugated plastic pipe having a wall structure made of high density polyethylene, PVC or polypropylene of sufficient thickness so as to be rigid but elastic and therefore relatively inflexible and having an integral automatically locking female coupling at one end and a cooperative male coupling at its opposite end, with access to its latching members at its exterior, and a method of manufacturing multiples thereof by a continuous molding process. The pipe has a corrugated wall structure. Only minor auxiliary cutting operations are required to separate portions thereof into individual plastic pipe sections, each having the automatic-locking coupling at one of its ends and a male portion at its other end. The coupling is supported on the corrugated pipe by a frusto-conically shaped collar which functions as a guide for proper alignment as two sections of such pipe are united into latched relation.