Zoom lens system having an image blur compensation function
US6285502A · kind A · utility
10Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Oct 12, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/646
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system has the first to fifth lens units from the object side. Refractive powers of the first to fifth lens units are positive, negative, negative, positive, negative, respectively. During zooming, the distances between the lens units are varied. Image blur compensation is made by parallel decentering the second lens unit. When f2 is the focal length of the second lens unit, f5 is the focal length of the fifth lens unit, and fw is the focal length of the entire lens system, then the following conditions are satisfied. EQU 0.2<.vertline.f2/fw.vertline.<4.0 EQU 0.2<.vertline.f5/fw.vertline.<0.4
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.