Ocular optical system
US11126047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2019 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Apr 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1397
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An ocular optical system including an eyewear device and a tunable light attenuator is provided. The tunable light attenuator is disposed on a light path which the eyewear device is disposed on and includes a plurality of cholesteric liquid crystal layers, a plurality of electrode layers, and a controller. Each of the cholesteric liquid crystal layers is disposed between two of the electrode layers. The controller is electrically connected to the electrode layers and configured to adjust voltages applied to the electrode layers so as to operate the cholesteric liquid crystal layers in at least two steps of light attenuation for randomly polarized light with at least one of a blue band and an ultraviolet band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.