Taking optical system having a hand-shake correction function
US6002519A · kind A · utility
9Cited by
5References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Mar 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/144105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A taking optical system capable of correcting an image blur resulting from vibration of the optical system consists of a first positive lens unit, a second negative lens unit, a third positive lens unit, and a fourth negative lens unit, and achieves zooming by varying distances between these lens units. The second lens unit includes a decentered lens element, which has a diffracting optical surface formed on its image-side surface, so that an image blur is corrected by decentering the decentered lens element translationally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.