US 12,174,466 B2
Ophthalmic lens having anti-reflective and electrochromic functions
William Trottier-Lapointe, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/263,426
Filed by ESSILOR INTERNATIONAL, Charenton-le-Pont (FR)
PCT Filed Jul. 26, 2019, PCT No. PCT/EP2019/070269
§ 371(c)(1), (2) Date Jan. 26, 2021,
PCT Pub. No. WO2020/021107, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 18306022 (EP), filed on Jul. 27, 2018.
Prior Publication US 2021/0294126 A1, Sep. 23, 2021
Int. Cl. G02C 7/10 (2006.01); G02F 1/155 (2006.01); G02F 1/157 (2006.01)
CPC G02C 7/101 (2013.01) [G02C 7/104 (2013.01); G02C 7/107 (2013.01); G02F 1/155 (2013.01); G02F 1/157 (2013.01)] 22 Claims
 
1. An ophthalmic lens comprising:
a transparent substrate with a front main face and a rear main face, at least one of said main faces being coated with a multilayered interferential (IF) stack comprising at least one HI layer having a refractive index higher than or equal to 1.55 and at least one LI layer having a refractive index lower than 1.55; and
an electrochromic (EC) stack that is one of: (i) part of said multilayered interferential stack, and (ii) directly deposited onto said multilayered interferential stack, to form a multilayered interferential (IF) coating that is able to modulate reflection, the EC stack being configured to reversibly switch from an activated state when an electrical potential is applied to a deactivated state when a reverse electrical is applied and to contribute to an interferential effect of the multilayered IF coating, and
wherein a total thickness of the multilayered IF coating including the EC stack is equal to or below 1 μm.