Essilor International

Corporation De L'ecole Polytechnique De Montreal

Thomas Schmitt

Ludvik Martinu

Karin Scherer

William Trottier-lapointe

Oleg Zabeida

Jolanta Klemberg-Sapieha

Martin Caron

Jolanta Sapieha

Thomas Poirie

Anita Dehoux

The invention concerns an ophthalmic lens having an increased resistance to thermal and hygroscopic stresses, said ophthalmic lens comprising a substrate, at least one main face of which is coated with a siloxane-based anti-abrasion hardcoat, characterized in that said ophthalmic lens further comprises at least one protective layer of an organic-inorganic material directly in contact with said hardcoat, said protective layer of organic-inorganic material having a Young's modulus higher than 20 GPa, preferably of at least 25 GPa.

Ophthalmic lens having increased resistance to hot and humid environment

The invention relates to an article comprising a substrate having at least one major surface coated with a layer A of a material obtained by ion beam assisted vacuum deposition of at least one titanium oxide and of at least one organosilicate compound B, said material having a refractive index at 550 nm higher than or equal to 1.8, an extinction coefficient k at 550 nm lower than or equal to 0.02, and an H:E ratio higher than or equal to 0.046, where H and E designate the hardness of the material and the elastic coefficient of the material, respectively.

Article having optimised thermomechanical properties, comprising a layer of titano-organic nature

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Montreal, Canada

Thomas Schmitt