Zoom lens, and image pickup apparatus and image pickup system including the zoom lens
US11061203B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2019 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Oct 11, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/698
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A zoom lens includes, in order from object side, a negative first unit, a positive second unit, a negative third unit, and a positive fourth unit, wherein, for zooming to telephoto end, the second unit moves toward object side, the third unit moves and an interval between each pair of adjacent units is changed, wherein, at telephoto end as compared to wide angle end, the interval between the first and second units is smaller, the interval between the second and third units is larger, the interval between the third and fourth units is larger, and the fourth unit is positioned closer to image side, wherein the third unit consists of a single optical element, wherein the fourth unit includes plural lenses arranged at intervals, and wherein focal lengths of the third and fourth units and the interval between the third and fourth units at telephoto end are appropriately set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.