Method and apparatus for ophthalmic devices including gradient-indexed liquid crystal layers and shaped dielectric layers
US9869885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | May 25, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/294
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention discloses methods and apparatus for providing a variable optic insert into an ophthalmic lens. A liquid crystal layer may be used to provide a variable optic function and in some embodiments, an alignment layer for the liquid crystal layer may be patterned in a radially dependent manner. The patterning may allow for the index of refraction of the optic device to vary in a gradient indexed or GRIN manner. At least a first layer of dielectric material that may vary in thickness at least across the optic zone of the device may aid in defining an electric field across the liquid crystal layer. An energy source is capable of powering the variable optic insert included within the ophthalmic lens. In some embodiments, an ophthalmic lens is cast-molded from a silicone hydrogel. The various ophthalmic lens entities may include electroactive liquid crystal layers to electrically control optical characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.