Driving apparatus for fine-tuning focus
US7457062B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2008 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Apr 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A driving apparatus for fine-tuning focus is provided, including a movable structure suspended inside an outer holder by a suspension set. The suspension set is connected to the movable structure and the outer holder respectively so that the movable structure is suspended inside the outer holder, and can move inside the outer holder. With a magnet force generated by the interaction of the magnetic field of said first magnet set and said second magnet set of said outer holder, and the electrical current in said first coils and said second coils of said movable structure, the magnet force is able to drive the movable structure upward and downward to adjust the focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.