Lens system
US8547645B2 · kind B2 · utility
0Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2010 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Sep 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143103
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens system including: a first lens group having a positive refractive power; a second lens group having a positive refractive power; and a third lens group having a positive or negative refractive power, wherein the first lens group comprises four or less lenses, and the first through third lens groups are movable, independently, during focusing and have magnifications in a range from −1 to 0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.