Zoom lens
US7230771B2 · kind B2 · utility
55Cited by
10References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2003 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Feb 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens comprising, from the object side to the image side, a front lens group (72), a controllable lens group, and a rear lens group (74), the controllable lens group comprising a voltage-controlled electrowetting device, which device contains a first fluid (A) and a second fluid (B) having different refractive indices, with at least two first fluid-second fluid interfaces (40,42). The curvatures, and thus the lens power, of these interfaces can be changed independently by supplying a voltage (V1, V2) to electrodes (22,32) of the device, so that no mechanical movement of lens elements is needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.