Lens barrel and optical device
US10120201B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2016 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Jul 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel that is capable of reducing unnecessary movement of an optical element. A first unit has a first correction optical element arranged on an optical axis and a first magnet that moves the first correction optical element along a first spherical surface around a first point on the optical axis. A second unit has a second correction optical element arranged on the optical axis and a second magnet that moves the second correction optical element along a second spherical surface of which radius is smaller than the radius of the first spherical surface around a second point on the optical axis. A magnetic body is arranged on at least one of the first unit and the second unit, and reduces leakage of magnetic flux from a facing part of the second magnet that faces the first magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.