Ophthalmic lens comprising a multilayered interferential coating and manufacturing method thereof
AssigneeEssilor International
InventorsMathieu Feuillade, Hélène Maury
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Abstract
This invention relates to an ophthalmic lens comprising a multilayered interferential coating and to a manufacturing method thereof. The ophthalmic lens comprises: an organic substrate having a front main face and a rear main face, and a multilayered interferential coating (30) which is coated on at least one of the front main face and the rear main face, According to the invention, the multilayered interferential coating (30) comprises at least one graphene layer (2) which has a uniform thickness of between 0,1 nm to 1 nm.
Claims19
An ophthalmic spectacle lens which is defined as a polarized spectacle lens, a photochromic spectacle lens, an active spectacle lens comprising an electroactive material, or a solar lens, comprising:
- an organic substrate having a front main face and a rear main face;
- and
- a multilayered interferential coating selected from an antireflection coating and a reflective coating which is coated on at least one of the front main face and the rear main face;
- wherein the multilayered interferential coating comprises at least one graphene layer which is formed from a graphene monolayer or a bilayer of graphene, and has a uniform thickness of between 0.1 nm to 1 nm;
- and
- wherein the multilayered interferential coating forms a stack comprising an alternation of:
- at least one high refractive layered unit of refraction index greater than 1.55, which comprises the at least one graphene layer and an underlying encapsulating layer of a thickness of between 5 nm and 85 nm over which the at least one graphene layer continuously extends, the at least one high refractive layered unit having a thickness of between 10 nm and 120 nm;
- and
- at least one low refractive layer of refraction index lower than 1.55 or a metallic layer;
- and
- wherein the multilayered interferential coating forms a stack consisting of inorganic dielectric thin layers, the at least one graphene layer and optionally the metallic layer.
A method for manufacturing an ophthalmic spectacle lens, which is defined as a polarized spectacle lens, a photochromic spectacle lens, an active spectacle lens comprising an electroactive material, or a solar lens, comprising:
- obtaining an organic substrate having a front main face and a rear main face;
- and
- depositing by chemical vapor deposition a multilayered interferential coating selected from an antireflection coasting and a reflective coating on at least one of the front main face and the rear main face, the multilayered interferential coating comprising at least one graphene layer formed from a graphene monolayer or a bilayer of graphene, which has a uniform thickness of between 0.1 nm to 1 nm;
- wherein the multilayered interferential coating forms a stack comprising an alternation of:
- at least one high refractive layered unit of refraction index greater than 1.55, which comprises the at least one graphene layer and an underlying encapsulating layer of a thickness of between 5 nm and 85 nm over which the at least one graphene layer continuously extends, the at least one high refractive layered unit having a thickness of between 10 nm and 120 nm;
- and
- at least one low refractive layer of refraction index lower than 1.55 or a metallic layer;
- and
- wherein the multilayered interferential coating forms a stack consisting of inorganic dielectric thin layers, the at least one graphene layer and optionally the metallic layer.
Dependencies are inferred from the claim text.