Zoom lens unit and image pickup device
US7508605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Feb 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a zoom lens unit excellent in shock resistance and space-saving. Second, third lens holders 29, 30 have shaft holes, into which shafts 27, 28 are inserted, so as to be movable in an optical axis direction. By first, second helical springs 31, 32 fitted to the shafts 27, 28, the second lens holder 29 is biased to a wall member 18 provided on a subject side, and the third lens holder 30 is biased to a wall member 19 provided on an image pickup element 12 side. As the power is turned off, the second lens holder 29 moves toward the subject side and, upon contact with the wall member 18, is stopped, while the third lens holder 30 moves toward the image pickup element 12 side and, upon contact with the wall member 19, is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.