Zoom lens and imaging apparatus
US11966030B2 · kind B2 · utility
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27Claims
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Key dates
| Filing date | Jan 20, 2022 |
| Grant date | Apr 23, 2024 |
| Priority date | — |
| Expiry date | Jun 18, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The zoom lens consists of, in order from an object side to an image side, a first lens group having a negative refractive power, a middle group, and a final group. During zooming, a spacing between the first lens group and the middle group changes, and a spacing between the middle group and the final group changes. During focusing, at least a part of the middle group moves, and the first lens group and the final group remain stationary with respect to an image plane. The zoom lens satisfies predetermined conditional expressions about a back focal length, a focal length, and a maximum half angle of view.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.