Lens barrel
US6813093B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Feb 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel comprises a first frame and a second frame. A first female helicoid is formed in a first region on the inner circumference face of the first frame, and a second female helicoid is formed in a second region on the inner circumference face thereof with the same lead and a different groove depth from that of the first female helicoid. The second frame is disposed inside of the first frame, and a first male helicoid for spirally meshing with the first female helicoid, and a second male helicoid for spirally meshing with the second female helicoid, are formed on the outer circumference thereof. The second frame is linearly moved when rotated relative to the first frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.