Zoom lens
US9874764B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Aug 19, 2015 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Aug 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/646
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens, in sequence from an object side to an image side along an optical axis, comprises a first lens group; a second lens group; a stop; and a rear lens group and comprising a third lens group, a fourth lens group, and a fifth lens group; the fourth lens group further comprises an image correction lens which is able to shifted in a direction transverse to the optical axis of the zoom lens to stabilize the picked-up image when the zoom lens vibrates; furthermore, the zoom lens satisfies the following condition: (1−βp)×βr>2, where βp is a lateral magnification of the image correction lens when the zoom lens is at the telephoto end, and where βr is a lateral magnification of the lenses in the rear lens group except for the lenses in front of the image correction lens when the zoom lens is at the telephoto end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.