Imaging lens and imaging apparatus
US9746638B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2016 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | May 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens is constituted by, in order from the object side to the image side: a positive first lens group; a stop; a negative second lens group; and a positive third lens group. Only the second lens group moves in the direction of the optical axis to perform focusing operations. The first lens group is constituted by, in order from the object side to the image side, a first lens group front group and a first lens group rear group. The first lens group front group is constituted by, in order from the object side to the image side, one positive lens and one negative lens, the first lens group rear group includes at least two negative lenses and at least three positive lenses. The second lens group is constituted by one or two positive lenses and one negative lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.