Two-stage lens driving device
US7574125B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Sep 13, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A two-stage lens driving device includes a lens holder, a guiding mechanism, and an electromagnetic actuating mechanism. The guiding mechanism is joined with the lens holder for guiding the lens holder moving along an axial direction. The electromagnetic actuating mechanism includes a magnetic induction member, a first coil member, and a second coil member. The magnetic induction member is mounted on and movable with the lens holder. The first and second coil members are respectively located at two tail ends of the magnetic induction member. The first coil member, the magnetic induction member, and the second coil member are arranged linearly parallel to the axial direction. A distance between the coil members is greater than a length of the magnetic induction member along the linear direction. By applying current to one of the coil members, the magnetic induction member is driven to move between the first and the second coil members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.