Lens of variable focal length
US7515350B2 · kind B2 · utility
12Cited by
2References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2005 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Apr 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens assembly of variable focal length comprises two transparent plates (24, 38) at least partially facing each other and parallel to one another and delimiting, at least in part, an internal volume (15) containing two non-miscible liquids having different optical indices. The lens comprises an elastic element (36) capable of deforming in response to a change in pressure of the liquids, in such a way as to substantially maintain the optical properties of the lens assembly, e.g., in order to maintain the parallelism of the two transparent plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.