Tunable liquid lens with reduced aberration
US8072574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Feb 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/291
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A tunable optical imaging system uses a fixed lens and a tunable liquid crystal lens that is operated only outside of an operational range of high aberration. A voltage range applied to change the optical power of the liquid crystal lens is limited to a continuous tunable range of low aberration. The relative positioning between the lens and a corresponding photodetector, and the relative lens powers of a fixed lens and the tunable lens, may be selected to compensate for any optical power offsets resulting from the limitation of the voltage range of the tunable lens. The lens may be operated in either positive tunability or negative tunability mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.