Liquid crystal waveguide with active incoupling
US10976579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2018 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Jan 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/302
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal waveguide (LCW) can include actively controlled incoupling of light into a LCW, such as by using a voltage-controlled electrode to actively vary a property of an LC material arranged to affect the incoupling of light into the LCW. Actively varying light incoupling into the LCW can be used, for example, such as for calibration or compensation or to provide closed-loop feedback such as to stabilize the amount of light into the LCW while accommodating or reducing sensitivity of the LCW to variations in one or more of: input laser light incidence angle, input laser wavelength, LCW or input laser temperature, input laser optical power level, or the like. This can advantageously help improve or maximize light incoupling efficiency, which can improve performance and robustness of the LCW under actual operating conditions. The LCW can be used for, among other things, beamsteering in in-plane and out-of-plane directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.