Zoom lens capable of image blur compensation
US5039211A · kind A · utility
28Cited by
7References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jul 28, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens has three or more lens groups. A variable power lens group or at least one lens group located in a position nearer to an image than a variable power lens group serves as an image blur compensating group which is displaceable with respect the remaining lens groups. The magnification m.sub.C of the image blur compensating group satisfies a relation with respect to a composite focal length f.sub.1 of the lens groups nearer to an object than the image blur compensating group such that EQU m.sub.C =1/{1+(f1/A)} wherein A is an arbitrary constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.