Zoom lens and image pickup apparatus including the same
US9116335B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 2014 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | May 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/145121
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens includes, in order from an object side to an image side thereof, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens group including one or more lens units. A distance between adjacent ones of the lens units changes during zooming. The second lens unit and the third lens unit each include a resin lens element. A focal length f2p of the resin lens element included in the second lens unit, a focal length f3p of the resin lens element included in the third lens unit, and a focal length ft of the zoom lens at a telephoto end are set to satisfy predetermined mathematical conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.