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.

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 determining an providing step (S4) during which second markings identifying a second reference system of the second surface are determined and provided according at least to optical data representing the refractive properties of the optical lens and to observation data representing observation conditions in which the first and second markings are to be observed.

Abstract: A method for manufacturing an ophthalmic lens by machining, includes the steps of providing and mounting a blank on a first supporting device having a first machining reference frame in a first position in which a lower surface of the blank is opposite the first device; machining, in the first position in the first reference frame, an upper surface of the blank, machining in a second predetermined machining reference frame which is known relative to the first at least one mechanical referencing element on the blank, and providing a second supporting device including at least one complementary mechanical referencing element configured such as to engage with the at least one mechanical referencing element so that the latter is positioned and supported on the second device in a second predetermined position.

Abstract: Method for mounting an optical lens (10) to be polished on a spindle (20) of a polishing device, the optical lens (10) comprising a first and a second main surface (101, 102), the method comprising: an optical lens (10) providing step (S1), in which an optical lens (10) whose first main surface (101) is to be polished is provided, a mounting step (S2), in which the optical lens (10) is mounted on the spindle (20), wherein, the mounting step (S2) further comprises a support device positioning step (S3), in which a support device (30) is positioned between the spindle (20) and the second surface (102) of the optical lens (10) so as to be rotated by the spindle (20) and to have a contact surface (31) partly in contact with the second main surface (102) of the optical lens (10) that partly extends beyond the second main surface (102) of the optical lens (10).

Abstract: Polishing method comprising a step of receiving a surface to be polished, a configuration step during which the polishing machine is configured, and a polishing step during which the optical surface is polished, wherein the angle of inclination of the pin is between 2° and 20°, the inner cusp point is between ?10 mm and 10 mm, the outer cusp point is between R?15 mm and R?5 mm, the speed of advance is between 100 mm/min and 2000 mm/min; the speed of rotation is between 500 rpm and 3000 rpm; and the bearing force is between 50 N and 180 N.

Abstract: The present invention relates to a method for transforming an initial progressive ophthalmic surface which has to be manufactured by a manufacturing method, the transformation method comprising: a step of selecting a manufacturing method intended to be implemented, in which said manufacturing method introduces a reproducible surface defect, a step of selecting a predictive model of said reproducible surface defect, a step of selecting an initial progressive ophthalmic surface S intended to be manufactured, a step of determining (S1), during which there is determined, by means of said predictive model, a surface defect value D which would be introduced if the initial progressive ophthalmic surface S were produced by said manufacturing method, a transformation step (S2), during which said initial progressive ophthalmic surface S is transformed into a transformed progressive ophthalmic surface S* by compensating the defect value D determined during the step (S1), such that the subsequent manufacture of the tr

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.

Abstract: The invention concerns a process for measuring and/or controlling a polishing process of an ophthalmic element (1) comprising the steps of manufacturing at least two cavities (2, 3) on the surface of the element to be polished, the depth of the first cavity (2) being smaller than the depth of the second cavity (3) operating the polishing process considering the element (1), in order to check that the first cavity (2) is suppressed and that the second cavity (3) is present.

Abstract: Method for mounting an optical lens (10) to be polished on a spindle (20) of a polishing device, the optical lens (10) comprising a first and a second main surface (101, 102), the method comprising: an optical lens (10) providing step (S1), in which an optical lens (10) whose first main surface (101) is to be polished is provided, a mounting step (S2), in which the optical lens (10) is mounted on the spindle (20), wherein, the mounting step (S2) further comprises a support device positioning step (S3), in which a support device (30) is positioned between the spindle (20) and the second surface (102) of the optical lens (10) so as to be rotated by the spindle (20) and to have a contact surface (31) partly in contact with the second main surface (102) of the optical lens (10) that partly extends beyond the second main surface (102) of the optical lens (10).