Macro lens system and pickup device including the same
US8681435B2 · kind B2 · utility
0Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2010 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Apr 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A macro lens system and a pickup device that includes the macro lens system include, in order from an object side to an image side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power, wherein, during focusing, the first lens group, the third lens group, and the fifth lens group are fixed, and the second lens group and the fourth lens group are moved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.