Systems and methods for forming ophthalmic lens including meta optics

Patent metadata

Field	Value
Publication number	US-2022011594-A1
Application number	US-202117386276-A
Country	US
Kind code	A1
Filing date	Jul 27, 2021
Priority date	Jul 29, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

An ophthalmic lens includes a hybrid plano-convex refractive lens body having a convex portion and a planar portion. A metasurface array can be associated with the planar portion and include an arrangement of metasurface building elements dimensioned from an optical wavelength. The metasurface building elements can be configured across the lens body to define an optical characteristic of the ophthalmic lens. The arrangement of metasurface building elements can include meta-atoms that are configured to induce a polarization-dependent focusing of light received by the ophthalmic lens. A shape of the meta-atoms of the array can be determined based on a function of the ophthalmic lens, including glare/halo reduction. The meta-atoms can be formed as canonical and/or freeform shapes.

First claim

What is claimed is:

1 . An ophthalmic lens, comprising:
a hybrid plano-convex refractive lens body having a convex portion and a planar portion; and a metasurface array associated with the planar portion and comprising an arrangement of metasurface building elements configured across the lens body to define an optical characteristic of the ophthalmic lens.

2 . The ophthalmic lens of claim 1 , wherein:
the planar portion defines a substantially planar surface of the hybrid plano-convex refractive lens body; and the metasurface array is arranged on the substantially planar surface.

3 . The ophthalmic lens of claim 2 , wherein:
the convex portion defines a convex surface arranged opposite the substantially planar surface; and the convex portion is configured to define a refractive characteristic of the ophthalmic lens.

4 . The ophthalmic lens of claim 1 , wherein the arrangement of metasurface building elements comprises meta-atoms defining a spatially varying Jones' matrix.

5 . The ophthalmic lens of claim 1 , wherein the arrangement of metasurface building elements comprises meta-atoms that are configured to induce a polarization-dependent focusing of light received by the ophthalmic lens.

6 . The ophthalmic lens of claim 5 , wherein the polarization-dependent focusing of light is configured to reduce a glare/halo characteristic of the ophthalmic lens.

7 . The ophthalmic lens of claim 5 , wherein:
the polarization-dependent focusing of light is configured to define the ophthalmic lens as a multifocal lens with at least a first focal point and a second focal point based on a polarization state of the received light; and the meta-atoms are configured to reduce an interference between the first focal point and the second focal point in response to an orthogonality of the polarization states.

8 . The ophthalmic lens of claim 1 , wherein the planar portion is formed from a titanium dioxide material.

9 . The ophthalmic lens of claim 1 , wherein the metasurface building elements comprise a collection of nano-post including a low optical loss dielectric material with high index of refraction in the visible spectrum.

10 . The ophthalmic lens of claim 1 , wherein the arrangement of metasurface building elements comprises meta-atoms having a canonical shape or a freeform shape.

11 . A method of forming a metasurface array, comprising:
determining a function of a metasurface array for an ophthalmic lens; determining a geometric shape of meta-atoms of the metasurface array based on the function; and forming a meta-atom library comprising meta-atoms having the geometric shape.

12 . The method of claim 11 , wherein:
the meta-atoms of the meta-atom library define a meta-atom design; the geometric shape comprises canonical shapes or freeform shapes; and further comprising optimizing the meta-atom design based on the function.

13 . The method of claim 12 , further comprising:
validating the optimized meta-atom design using a simulation tool and determining a validation metric of the optimized meta-atom design relative to the function of the metasurface array; comparing the validation metric to a threshold value; and repeating the optimizing of the meta-atom design where the validation metric is less than the threshold value.

14 . The method of claim 11 , wherein the geometric shape comprises a canonical shape comprising isotropic nanostructures.

15 . The method of claim 11 , wherein the geometric shape comprises a canonical shape comprising anisotropic nanostructures.

16 . The method of claim 11 , wherein the geometric shape comprises a freeform shape having at least a 2-fold symmetry.

17 . The method of claim 11 , wherein the function comprises a reduced glare/halo characteristic of the ophthalmic lens.

18 . The method of claim 11 , wherein the meta-atoms of the meta-atom library cooperate to define a meta-atom design configured to induce a polarization-dependent focusing of light received by the ophthalmic lens.

19 . A method of manufacturing an ophthalmic lens, comprising
forming a meta-atom library, comprising:
determining a function of a metasurface array for an ophthalmic lens;
determining a geometric shape of meta-atoms of the metasurface array based on the function; and
forming the meta-atom library comprising meta-atoms having the geometric shape; and
forming a metasurface array by establishing metasurface building elements comprising the meta-atoms of the meta library in a matrix.

20 . The method of claim 19 , wherein the matrix is held with a titanium dioxide material platform.

21 . The method of claim 20 , further comprising associating the metasurface array with a lens body.

22 . The method of claim 21 , wherein:
the lens body comprises a hybrid plano-convex refractive lens body having a convex portion and a planar portion; and further comprises associating the titanium dioxide material platform having the meta-atoms with planar portion.

Assignees

• Menicon Co Ltd

Inventors

• Newman Stephen D
• Li Zhaoyi
• Chen Wei-Ting
• Yousef Kerolos M A
• Capasso Federico

Classifications

• G02B1/002

  made of materials engineered to provide properties not available in nature, e.g. metamaterials · CPC title

• G02B3/00

  Simple or compound lenses · CPC title

• G02C7/022 Primary

  Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence) · CPC title

• G02C2202/24

  Myopia progression prevention · CPC title

• G02C7/041

  bifocal; multifocal · CPC title