Essilor International

Essilor International Charenton-le-pont

Ilya Bolshakov

Xingzhao Ding

Hélène Maury

William Trottier-lapointe

The invention relates to an optical article comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered interferential coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index layer lower than 1.55, characterized in that said multilayered interferential coating has a mean reflection factor for wavelengths ranging from 445 nm to a predetermined maximum wavelength higher than or equal to 1185 nm, noted R, that is lower than or equal to 2.9%, preferably 2.6% at an angle of incidence lower than or equal to 45°.

Optical article with very low reflection in the visible region and in the near infrared region

An ophthalmic lens with a low reflection in both the ultraviolet region and the visible region is disclosed. The ophthalmic lens comprises a substrate with a front main face and a rear main face. The rear main face is coated with a multilayered antireflective coating. The antireflective coating comprises a stack of at least one layer having a refractive index higher than 1.6 and of at least one layer having a refractive index lower than 1.55. The mean reflection factor Ron the rear face between 280 nm and 380 nm, weighted by the function W(&#x3bb;), is lower than or equal to 5%, preferably is lower than or equal to 4%, for an angle of incidence of 35&#xb0;. The Chroma C* of reflected light is equal to or lower than 4, preferably lower or equal to 3, for an angle of incidence (&#x3b8;) of 15&#xb0;.

Optical article comprising an antireflective coating with a low reflection both in the ultraviolet region and in the visible region

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that:

Optical article comprising an antireflective coating with a very low reflection in the visible and ultraviolet regions

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that: said at least one high refractive index layer (HI) is in direct contact with said at least one low refractive index layer (LI) forming a bilayer, said bilayer has a physical thickness lower than or equal to 60 nm, said bilayer is, in the direction moving away from said transparent substrate, in second to last place in said multilayered antireflective coating, said multilayered antireflective coating has a mean reflection factor Ruv between 280 nm and 380 nm, lower than 5% for an angle of incidence in the range from 20&#xb0; to 50&#xb0;.

Growing community of inventors

Dallas, TX, United States of America

Ilya Bolshakov