Sphero cylindrical eye refraction system using fluid focus electrostatically variable lenses
US7413306B2 · kind B2 · utility
29Cited by
11References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Jul 28, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/004
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Optical devices, systems, and methods can produce and/or measure cylindrical (as well as spherical) lens shapes throughout a range of both powers and cylindrical axes. Fluid focus lenses employ electrical potentials to vary the shape of a fluid/fluid interface between two immiscible fluids having differing indices of refractions by controlling localized angles between the interface and a surrounding container wall. Spherical power, cylindrical power, and cylindrical access alignment may be varied with no moving parts (other than the fluids).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.