Lens driving apparatus
US5191482A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Jan 18, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens driving apparatus for moving a plurality of lens groups, in an optical axis direction, to change the spatial distance therebetween, including a supporting cylinder which is secured to an immovable portion of a lens barrel, a cam ring which is rotatably fitted on the supporting cylinder, at least two inner lens moving frames which are provided in the supporting cylinder so as to move in the optical axis direction, guide grooves which are formed on the supporting cylinder to guide the lens moving frames in the optical axis direction, cam grooves which are formed on the cam ring to move the lens moving frames along therewith, and cam followers which are secured to the inner lens moving frames and which extend through the corresponding guide grooves to be fitted into the corresponding cam grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.