Anti-vibration zoom lens optics
US8228605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2011 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jan 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/64
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Anti-vibration zoom lens optics of four lens groups where a unit associated with an aperture stop and an anti-vibration unit can be spaced apart from each other without interference between their driving mechanisms. The four groups include a leading, first lens group of positive refractivity, a succeeding second lens group of negative refractivity, a third lens group of positive refractivity, and a trailing, fourth lens group of positive refractivity all arranged in this order from the front end closest to the object to the rearmost. The fourth lens group include three subsets of lens pieces, a leading, first subset, a succeeding, second subset, and a trailing, third subset all arranged in this order from the front end closest to the object to the rearmost, and the second subset of lens pieces are moved perpendicular to the optical axis to compensate for blur in the imaging plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.