Compact optical zoom
US8203627B2 · kind B2 · utility
1Cited by
9References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2009 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system includes a variator lens group, a compensator lens group and a third lens group. The compensator lens group is arranged to only partially compensate for movement of the variator group. In order to provide further compensation for the zoom lens, an image enhancer implement wavefront coding and artifact reduction techniques. The compensator group may be fixed or alternatively, its movement relative to the variator may be effected by a simple cam mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.