Zoom lens system having an image blur compensating function
US6266189A · kind A · utility
16Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1997 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Feb 20, 2017 |
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. The second lens unit includes a first lens unit and a rear lens unit, either of which can be moved vertically to the optical axis to compensate for image blur. The distance between the front and rear lens units is fixed during a zooming mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.