Zoom lens barrel and camera
US6459537B2 · kind B2 · utility
4Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2001 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jan 30, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens barrel which is an integrated zoom and focus drive type zoom lens barrel that moves lens units on a single zoom line having plurality of focusing sections and plurality of zooming sections, wherein the single zoom line has characteristic that the “rate of change of the relative distance of the two lens units with regard to a barrel rotation angle” in each focusing section becomes smaller in the focusing sections of the telephoto side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.