Essilor International (compagnie Generale D'optique)

Essilor International

Aude Lapprand

Haifeng Shan

Pascale Lacan

Gerald Fournand

Richard Muisener

Yves Leclaire

Cédric Begon

Cedric Lemaire

Christelle Marck

Yu Liu

Cedric Begon

Cédric Lemaire

Sébastien Pinault

Christophe Valenti

Montserrat Burgos

Sebastien Pinault

Christian Massart

Gilles Massey

Muriel Godeau

Catherine Roussel

The present invention relates to an ophthalmic lens whose front and rear faces are differentiated with respect to their hydrophobic properties. Said lens comprising a substrate having a hydrophobic front main face, and a rear main face whose external surface has a receding contact angle with water greater than or equal to 80&#xb0;, the external surface of said front main face having a receding contact angle with water lower than that of the rear main face. The invention presents various means for preparing such lenses, which may notably be obtained after deposition and then removal of temporary layers with different thicknesses on the two faces of the lens.

Ophthalmic lens having different anti-fouling properties on each of the two surfaces thereof and manufacturing methods

The invention concerns an optical lens comprising (i) a temporary coating at least partially covering a surface of the lens, said temporary coating comprising an outermost layer mechanically degradable through friction and/or contact; (ii) a removable film having opposite first side and second sides which adhere to said outermost layer through its first side, wherein&#x2014;the first side of the film has a roughness Rq lower than 750 nm and the first side of the film has a surface energy lower than 38 mJ/m.

Optical lens comprising a protective removable film

A method for cutting-out a multi-layer ophthalmic lens () following a desired contour (C), includes: a step of pre-blanking the ophthalmic lens () using a preliminary tool (), according to a preliminary contour (CC); a step of blanking the ophthalmic lens () using a blanking wheel (), following a blanking contour (CC); and a step of finishing the ophthalmic lens () using a finishing tool (). According to the invention, the preliminary contour (CC) is larger than the desired contour (C), and the blanking wheel () used has a granulometry of between 0.1 and 0.5 mm and is controlled in relation to the ophthalmic lens () so as to apply a radial force of between 0.1 and 5 N to the ophthalmic lens () during the blanking step.

Method for cutting-out a multi-layer ophthalmic lens

An ophthalmic lens includes: a transparent ophthalmic lens substrate made of organic glass; an adhesive layer covering at least one of the faces of the transparent substrate; a transparent film made of a thermoplastic polymer fixed to the transparent substrate via the adhesive layer; and an abrasion-resistant coating covering the transparent thermoplastic polymer film, characterized in that the ophthalmic lens has a minimum thickness at the center of less than 2 mm, preferably less than 1.5 mm and even more preferably less than 1.2 mm. Two processes for manufacturing such a lens and the use of an adhesive multilayer film to improve the impact strength of such a lens are also described.

Impact-resistant ophthalmic lens and its manufacturing process

The invention relates to an optical article including a transparent substrate of organic glass, preferably a substrate of an ophthalmic lens, an adhesive layer covering at least one of the faces of the transparent substrate, a transparent film of thermoplastic polymer fixed on the transparent substrate by means of the adhesive layer, an anti-abrasion hard coating covering the transparent film of thermoplastic polymer, and a multilayer antireflection coating formed from alternating mineral layers with high and low refractive index. The invention also relates to a method of manufacturing said article.

Antireflection ophthalmic lens and method of manufacture method

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Charenton le Pont, France

Aude Lapprand