Zoom lens and image pickup device
US7952811B2 · kind B2 · utility
1Cited by
0References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2009 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Oct 16, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143507
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed herein is a zoom lens formed by arranging a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power in order from an object side to an image side, wherein at a time of varying power from a wide-angle end to a telephoto end, the first lens group is moved, and the second lens group is moved to the object side such that an air interval between the first lens group and the second lens group is decreased and such that an air interval between the second lens group and the third lens group is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.