Essilor International

Corporation De L'ecole Polytechnique De Montreal

Martin Caron

Jolanta Klemberg-Sapieha

Ludvik Martinu

Karin Scherer

Oleg Zabeida

Sébastien Chiarotto

Thomas Schmitt

The invention relates to an article comprising a substrate having at least one main surface coated with a layer L of a material M obtained by vacuum deposition, by co-evaporation, of at least one metallic compound A chosen from alkaline-earth metal fluorides and of at least one organic compound B, the material M having a refractive index at the wavelength of 632.8 nm ranging from 1.38 to 1.47. According to the invention:

Item comprising an organic-inorganic layer with a low refractive index

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

Growing community of inventors

Montreal, Canada

Martin Caron