Pitch variable optical devices and systems containing the same
US10890823B1 · kind B1 · utility
11Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2019 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Oct 18, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device is provided. The optical device includes an optical grating. The optical grating includes two electrodes arranged opposite to each other and a liquid crystal (LC) composition sandwiched between the electrodes. The two electrodes provide a driving voltage to the optical grating. The LC mixture includes a host LC and one or more LC dimers dissolved as a guest in the host LC. The host LC and the one or more LC dimers have respective dielectric anisotropies of opposite signs in nematic phase. A net dielectric anisotropy of the LC mixture is substantially neutral at a predetermined temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.