Minature zoom lens
US7391579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Jul 28, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A miniature zoom lens comprises a front housing, a rear housing communicated with the front housing to form a receiving space, a connecting plate for connecting the front housing with the rear housing, a guiding module provided with at least one guiding rod, and a lens module provided with at least one lens assembly. The guiding rod passes through the lens assembly to position the lens assembly with each other in the receiving space. The lens assembly has at least one supporting base formed with at least one lens connecting portion, and at least one lens unit screw-connected to the lens connecting portion. The supporting base has an outer peripheral surface formed with a plurality of permanent magnets while the receiving space of the front and rear housings has an inner peripheral surface mounted with at least one driving coil corresponding to the permanent magnets and spaced apart from each other in a predetermined interval. The driving coil is powered to generate an electro-magnetic force interacting with the permanent magnets to actuate the lens assembly to linearly move relative to the guiding rod so that the lens assembly is used as a zoom mechanism for adjusting the focus of …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.