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公开(公告)号：US20230148164A1
公开(公告)日：2023-05-11
申请号：US17920480
申请日：2021-04-22
Applicant: Essilor International
Inventor： Anaelle MORTREUX , Chefik HABASSI , Philippe VANEECKHOUTTE
Abstract: The invention relates to a water based composition to be used for the preparation of anti-abrasion coatings on ophthalmic lenses. The composition comprises: the product of hydrolysis of an epoxyalkoxysilane SiXY3, wherein X represents a monovalent organic group linked to the silicon atom through a carbon atom and containing at least one epoxy function and Y represents an alkoxy group; cationic nanoparticles comprising silica, wherein a water sol of said cationic particles is stable at acidic pH; an inorganic non-hydrogen Lewis acid; a surfactant such that a water solution of 15 wt % of said surfactant exhibits a static surface tension below 25 mN/m at 20° C.; less than 0.5 wt % of a water miscible organic solvent less volatile than water. Moreover, the composition comprises no organic solvents other than said water miscible organic solvent less volatile than water and other than organic solvents that are a product of hydrolysis of the epoxyalkoxysilane.
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公开(公告)号：US20240151985A1
公开(公告)日：2024-05-09
申请号：US18548598
申请日：2022-03-04
Applicant: Essilor International
Inventor： Mathieu MEYNEN , Sira UHALTE NOGUES , Chefik HABASSI , Nicolas MAITRE , Antoine MONVOISIN
Abstract: A method and an optical system adapted for a wearer having an ophthalmic prescription. The optical system includes an optical device having a planar optical function, and an optical lens having an optical function based on the prescription of the wearer. The rear face of the optical device is attached to the front face of the optical lens, the optical device having at least one mechanical reference so as to allow an accurate relative position of the optical device and the optical lens.
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