Abstract: The present invention relates to an ophthalmic lens (L6) comprising a substrate (1) having a front main face and a rear main face, the front main face being surmounted by a multilayer inorganic coating (2) that has an average luminous reflectance factor Rv in the visible equal to or higher than 4% and that consists of a stack comprising: at least two low-refractive-index layers that each consist of a first material of refractive index lower than 1.55, and at least one high-refractive-index layer that consists of a second material of refractive index higher than 1.55 and that is located between two said low-index layers that are adjacent in said stack, characterized in that said coating (2) has a thickness smaller than or equal to 600 nm and a Bayer ISTM abrasion-resistance value higher than 10.

Abstract: The present invention relates to an ophthalmic lens (L6) comprising a substrate (1) having a front main face and a rear main face, the front main face being surmounted by a multilayer inorganic coating (2) that has an average luminous reflectance factor Rv in the visible equal to or higher than 4% and that consists of a stack comprising: at least two low-refractive-index layers that each consist of a first material of refractive index lower than 1.55, and at least one high-refractive-index layer that consists of a second material of refractive index higher than 1.55 and that is located between two said low-index layers that are adjacent in said stack, characterized in that said coating (2) has a thickness smaller than or equal to 600 nm and a Bayer ISTM abrasion-resistance value higher than 10.

Abstract: Disclosed is an optical article, preferably an ophthalmic lens, including a substrate having at least one main surface and a precursor coating of an anti-fog coating, the precursor coating in direct contact with either the main surface of the substrate, or with a first coating, when the main surface of the substrate is coated with a first coating, the precursor coating being formed by a deposition of at least one hydrophilic compound A on the substrate or on the first coating, including an inner portion in which the compound A is grafted on the substrate or on the first coating, and an outer portion that can be removed by washing and/or wiping, resulting from the deposition of the compound A, and being coated with a temporary layer, in direct contact with the compound, including at least one compound selected from the metal fluorides and the compounds including magnesium and oxygen.

Abstract: The present invention concerns an optical article comprising a substrate, at least one of the main surfaces of which is coated with a first coating comprising, at its surface, silanol groups and, in direct contact with this coating, a second coating which is a precursor for an antifog coating, the second coating being formed by deposition, on the first coating, of at least one compound A having a polyoxyalkylene group, and at least one group capable of establishing a covalent bond with a silanol group, wherein the second coating comprises an internal part, in which compound A is grafted to the first coating, and an external part, which can be removed by washing and/or wiping, resulting from the deposition of the compound A, and wherein the second coating is coated with at least one temporary layer comprising at least 50% by weight of silica.

Abstract: Disclosed is an optical article, preferably an ophthalmic lens, including a substrate having at least one main surface and a precursor coating of an anti-fog coating, the precursor coating in direct contact with either the main surface of the substrate, or with a first coating, when the main surface of the substrate is coated with a first coating, the precursor coating being formed by a deposition of at least one hydrophilic compound A on the substrate or on the first coating, including an inner portion in which the compound A is grafted on the substrate or on the first coating, and an outer portion that can be removed by washing and/or wiping, resulting from the deposition of the compound A, and being coated with a temporary layer, in direct contact with the compound, including at least one compound selected from the metal fluorides and the compounds including magnesium and oxygen.

Abstract: The present invention concerns an optical article comprising a substrate, at least one of the main surfaces of which is coated with a first coating comprising, at its surface, silanol groups and, in direct contact with this coating, a second coating which is a precursor for an antifog coating, the second coating being formed by deposition, on the first coating, of at least one compound A having: a polyoxyalkylene group, and at least one group capable of establishing a covalent bond with a silanol group, characterized in that the second coating comprises an internal part, in which said compound A is grafted to the first coating, and an external part, which can be removed by washing and/or wiping, resulting from the deposition of the compound A, and in that the second coating is coated with at least one temporary layer comprising at least 50%, preferably at least 60% and better still at least 70% by weight of silica, with respect to the total weight of the temporary layer.

Abstract: The present invention relates to an optical article comprising a substrate provided with a coating comprising silanol groups on the surface thereof and, directly contacting this coating, an anti-fog coating precursor coating, said precursor coating having a static contact angle with water of more than 10° and of less than 50°, a thickness lower than or equal to 5 nm, and being obtained through the grafting of at least one organosilane compound having a polyoxyalkylene group comprising less than 80 carbon atoms and at least one silicon atom bearing at least one hydrolyzable group. The anti-fog coating precursor is converted into an actual anti-fog coating by applying on the surface thereof a film of a liquid solution comprising at least one surfactant. The anti-fog coating is immediately operational and provides long-lasting effects.

Abstract: The present invention relates to an optical article comprising a substrate provided with a coating comprising silanol groups on the surface thereof and, directly contacting this coating, an anti-fog coating precursor coating, said precursor coating having a static contact angle with water of more than 10° and of less than 50°, a thickness lower than or equal to 5 nm, and being obtained through the grafting of at least one organosilane compound having a polyoxyalkylene group comprising less than 80 carbon atoms and at least one silicon atom bearing at least one hydrolyzable group. The anti-fog coating precursor is converted into an actual anti-fog coating by applying on the surface thereof a film of a liquid solution comprising at least one surfactant. The anti-fog coating is immediately operational and provides long-lasting effects.

Abstract: Process for coloring an optical lens by spin coating which comprises (i) increasing or decreasing the temperature of at least one zone of the lens surface by at least 2° C. by any suitable means and (ii) simultaneously, or successively, depositing a colored coating comprising a volatile solvent over the entire surface of the lens by spin coating. The subject of the invention is also a method of controlling the thickness of a coating, deposited by spin coating over the whole lens, and a colored lens obtained by the coloring process of the invention.

Abstract: Method and apparatus to eliminate the sharp edge between each of the faces of an ophthalmic lens blank and the peripheral cylindrical surface therebetween. The connecting zone between each face and the cylindrical surface initially includes an edge. A cylindrical deburring tool is mounted on a tool support for pivotal movement orthogonal to the axis of the lens. Rotation of the deburring tool about its axis is prevented. The angle position of the deburring tool is adjustable. A spring urges the mounting to a rest position. A drive displaces the tool support.