Optical Lens Having an Interferential Coating and a Multilayer System for Improving Abrasion-Resistance

An optical lens comprising:

• a substrate having a front main face and a rear main face, at least one main face of which being successively coated with:
• (A) a first high refractive index sheet having a refractive index higher than 1.55, which does not comprise any Ta2O5 layer;
• (B) a second low refractive index sheet having a refractive index of 1.55 or less in direct contact with the former sheet;
• (C) a third high refractive index sheet having a refractive index higher than 1.55 in direct contact with the former sheet;
• a monolayer sub-layer having a thickness higher than or equal to 100 nm in direct contact with the former sheet (C);
• 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;
• and
• the mean reflection factor RUV on said rear main face between 280 nm and 380 nm, weighted by the function W(λ) defined in the ISO 13666:
• 1998 standard, is lower than 10%, for an angle of incidence of 35°.