Zoom lens
US9829688B2 · kind B2 · utility
0Cited by
4References
20Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | May 2, 2016 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jun 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens has a four-group zoom configuration, in order from the object side to the image side, consisting of negative, positive, positive, and positive refractive power. The zoom lens carries out zooming from the wide-angle end to the telephoto end mainly by changing the distance between the third lens group and the fourth lens group. Also, the distance between the second lens group and the third lens group may be decreased in the zooming. Focusing is carried out mainly by moving the second lens group along the optical axis. Such a zoom lens is thin and small in size, and has a great imaging performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.