Essilor International

Corporation De L'ecole Polytechnique De Montreal

Nicolas Maitre

Francisco De Ayguavives

Ludvik Martinu

Christophe Valenti

Yohann Felten

Oleg Zabeida

Delphine Passard

Alexis Theoden

Melanie Tessieres

Pierre-Jean Calba

Sébastien Chiarotto

William Trottier-Lapointe

Frédéric Guillain

Yannick Moysan

Mélanie Tessieres

José Albuquerque Da Silva

Grégory Hervieu

Benoit Emprin

Artem Shelemin

The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less. The ratio: (I) is higher than or equal to 1.5, and/or the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance.

Optical article having an interferential coating with a high abrasion-resistance

The invention relates to an optical article comprising a substrate having at least one main face successively coated with a layer comprising chromium, silicon and oxygen, a monolayer sub-layer having a thickness higher than or equal to 100 nm, a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less, wherein the ratio (I) is higher than or equal to 1.5, and the optical article has a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7.

Optical article having an interferential coating with an improved abrasion-resistance

The invention relates to an optical article comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 100 nm, a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less, wherein the ratio is higher than or equal to 2, the outermost high refractive index layer(s) of the interferential coating do(es) not comprise TiO, and the outermost low refractive index layer(s) of the interferential coating is (are) deposited without ionic assistance. 

Optical article having an abrasion and temperature resistant interferential coating with an optimized thickness ratio of low and high refractive index layers

The invention concerns a method for producing an optical article suitable for edging comprising an antifouling layer on which there is deposited a temporary overlayer for assisting with edging, comprising:

Method for reducing or preventing the degradation of an antifouling layer or an optical article

The present invention relates to a transparent ophthalmic lens comprising a substrate having a main front face and a main rear face, said main front face being coated with a multilayer interference coating, preferably an anti-reflection coating, comprising a stack of at least one layer have a refractive index greater than 1.6 and at least one layer having a refractive index less than 1.55, characterized in that:

Optical article comprising an interference coating with high reflectivity in the ultraviolet region

The ophthalmic lens includes a substrate, the substrate having a rear face and a front face, and at least one external interferential coating, the at least one interferential coating being such that it enables to selectively reflect light arriving on the rear face with a local maximum of reflection of at least 10% for a wavelength within the range between 450 nm and 490 nm.

Ophthalmic anti-somnolence lens, device and method

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Charenton-le-Pont, France

Nicolas Maitre