Lens driver
US8964316B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 2013 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Jul 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0069
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens driver which moves at least one lens relative to a supporter includes a holder provided in the supporter to hold the lens to be movable in an optical axis direction, a driver configured to apply to the holder a driving force in the optical axis direction, and a position detector configured to detect a position of the holder in the optical axis direction relative to the supporter, and the lens driver including a coil provided in one of the holder and the supporter to form a straight electric path orthogonal to the optical axis direction, and a magnetic circuit provided in the other of the holder and the supporter, the magnetic circuit including a rectangular magnetic pole surface having a predetermined width to form a magnetic field orthogonal to the optical axis direction and the electric path, and being provided such that the magnetic pole surface faces the optical path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.