Lens barrel
US11307380B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2020 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Dec 10, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel including a first main shaft and a first sub-shaft that guide the movement of a third front lens group (G3a), a second main shaft and a second sub-shaft that guide the movement of a fourth lens group (G4), a hall element that is used to detect the position of the third front lens group (G3a), and an MR sensor that is used to detect the position of the fourth lens group (G4) are disposed on a straight line passing through an optical axis in a cross section orthogonal to the optical axis. The first main shaft and the second main shaft overlap each other in a direction of the optical axis. In a drive unit for each lens group, a plurality of drive magnets are arranged symmetrically with respect to the straight line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.