Essilor International S.A. is a French company that produces ophthalmic lenses along with ophthalmic optical equipment. It is based in Paris, France, and quoted on the Euronext Paris Stock Exchange. As one of the 40 largest companies traded in Paris, it is a component of the CAC 40 share index.Essilor is responsible for creating Varilux, the world's first progressive lens which corrects presbyopia and allows clear vision in the wearer's near, intermediate and far vision. The company formed from the merger of ophthalmic firms Essel and Silor in 1972. Essilor now operates in over 100 countries over five continents. Its activities are largely focused on research and development. It is the world's largest manufacturer of ophthalmic lenses. Wikipedia.
Essilor | Date: 2015-03-31
A method for depositing a topcoat layer on, at least, one face of a substrate, includes the steps of: a) providing a flexible deposition device including a flexible supporting medium having a supporting surface coated with a film of a topcoat material; b) bringing into contact the film of topcoat material of the flexible deposition device with the face of the substrate; c) applying a pressure on the flexible supporting medium so that the flexible deposition device conforms to the geometry of the face of the substrate; and d) peeling off the flexible supporting medium from the substrate, whereby the topcoat material is at least partially separated from the flexible supporting medium and deposited on the contacted face of the substrate to form the top coat layer.
Essilor | Date: 2015-03-27
An optical component includes: a plastic base; and a multilayer film disposed on at least a rear surface of both surfaces of the plastic base, wherein the multilayer film has a maximum reflectivity of 3% to 50% in a wavelength range of 380 nm to 780 nm and has an average reflectivity of 20% or less in a wavelength range of 280 nm to 380 nm.
Essilor | Date: 2015-07-27
A method for depositing, under vacuum, an amorphous layer primarily containing fluorine and carbon onto a substrate (
Essilor | Date: 2015-04-24
An optical component is characterized in that: a spectral characteristics curve of a multilayer film provided on a first surface of a plastic base has one local maximum at a first wavelength in a wavelength range of 380 nm to 780 nm and has one local minimum at a second wavelength 200 nm or less longer than the first wavelength; an average reflectivity of the multilayer film provided on the first surface in a wavelength range of the first wavelength 25 nm is 50% or less; an average reflectivity of a multilayer film provided on a second surface of the plastic base relative to the average reflectivity of the multilayer film provided on the first surface is 40% or less in the wavelength range of the first wavelength 25 nm; and a spectral characteristics curve of the multilayer film provided on the second surface does not have a local maximum in the wavelength range of the first wavelength 25 nm.
Essilor | Date: 2015-03-04
A selective dyeing method is used for dyeing a substrate, selectively within a first exposed surface portion of said substrate. For this purpose, the substrate consists of a material that is impervious to a dye with the exception of the first portion of the exposed surface. In particular, the impervious material can form a layer which covers a base portion of the substrate in a second portion of the exposed surface. The substrate is heated such that the dye penetrates a pervious material which constitutes the first portion of the exposed surface. The method is particularly useful for eliminating light diffused by the walls of a multilayer structure which is supported by means of ocular glass.