Variable focus lens having a plurality of protrusions at one end of fluid chamber
US7782541B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a variable focus lens including a fluid chamber containing first and second fluids which are non-miscible and have different refractive indices, the fluid chamber having a plurality of protrusions formed along a circumference of one open end thereof. The variable focus lens also includes a transparent plate attached to the open end of the chamber via a sealing with a predetermined interval from the protrusions. The variable focus lens further includes a first electrode disposed inside the chamber to act on the first fluid and a second electrode disposed inside the chamber and is insulated from the first fluid. The invention allows an easy manufacturing process without bubble formation, and eliminates entry and formation of bubbles due to external changes such as in temperature and pressure, thereby allowing good performance of the lens regardless of external environmental changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.