US 12,124,117 B2
Optical lens having a filtering interferential coating and a multilayer system for improving abrasion-resistance
Christophe Valenti, Charenton-le-Pont (FR); Frédéric Guillain, Charenton-le-Pont (FR); and William Trottier-Lapointe, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/293,296
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Nov. 18, 2019, PCT No. PCT/EP2019/081686
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2020/104392, PCT Pub. Date May 28, 2020.
Claims priority of application No. 18306521 (EP), filed on Nov. 19, 2018.
Prior Publication US 2022/0011601 A1, Jan. 13, 2022
Int. Cl. G02C 7/10 (2006.01); G02B 1/116 (2015.01); G02C 7/02 (2006.01); C23C 14/08 (2006.01)
CPC G02C 7/107 (2013.01) [G02B 1/116 (2013.01); G02C 7/022 (2013.01); G02C 7/024 (2013.01); C23C 14/081 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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
said multilayer interferential coating is a multilayer filtering interferential coating that selectively reflects visible light in a range of wavelengths, and the reflection spectrum of said multilayer filtering interferential coating has a reflection peak centered at a wavelength chosen within said range of wavelengths that exhibits a full width at half maximum lower than 150 nm; or
said multilayer interferential coating is a multilayer filtering interferential coating that selectively transmits visible light in a range of wavelengths, and the transmission spectrum of said multilayer filtering interferential coating has a transmission peak centered at a wavelength chosen within said range of wavelengths that exhibits a full width at half maximum lower than 150 nm;
wherein a selective reflection corresponds to a maximum of reflection of the multilayer filtering interferential coating locally higher than 5%, as compared to a reflection baseline, and a selective transmission corresponds to a maximum of transmission of the multilayer filtering interferential coating locally higher than 5%, as compared to a transmission baseline.