Zoom lens and photographing apparatus having the same
US6462885B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Jan 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/144113
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens includes a first lens unit with a positive refractive power, a second lens unit with a negative refractive power, a third lens unit with a positive refractive power, and a fourth lens unit with a positive refractive power, which are arranged in this order from an object side. At least the first, third and fourth lens units are moved along an optical axis to vary spatial distances of the lens units to thereby change the magnification of the zoom lens. The third lens unit includes a first lens subunit with a positive refractive power, and a second lens subunit with a negative refractive power, and the second lens subunit is moved to have at least a perpendicular vector component with respect to the optical axis to thereby displace an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.