Zoom lens and imaging apparatus
US10838180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Feb 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the first lens group is fixed, and distances between the respective lens groups change in predetermined manners. The first lens group consists of, in order from the object side, a negative lens group fixed during focusing, a positive lens group movable during focusing, and a positive lens group fixed during focusing. The lens group has on the most image side four lenses of, in order from the object side, a positive lens, a cemented lens in which a negative meniscus lens having a convex surface facing the object side and a positive lens are cemented, and a positive meniscus lens having a convex surface facing the object side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.