Optical systems with adjustable lenses
US11105963B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2017 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Oct 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/286
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical systems may have tunable lenses with focal lengths that are adjusted by control circuitry. A display may produce image light that is received by a tunable lens. The display may be transparent so that light from objects can pass through the display and be received by the tunable lens. The tunable lens may include a birefringent lens element and a polarization rotator and may receive light that has been linearly polarized by passing through a linear polarizer. The polarization rotator may be operable in a first state in which the polarization of light passing through the polarization rotator is not rotated and a second state in which the polarization of light passing through the polarization rotator is rotated by 90°. The birefringent lens element may be formed from a cured liquid crystal polymer or other polymer and may have a liquid crystal additive to enhance birefringence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.