Imaging lens and imaging apparatus
US12379572B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2022 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Feb 25, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0007
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The imaging lens consists of, in order from the object side to the image side, a first lens group having a positive refractive power, a second lens group, and a third lens group. During focusing, the second lens group moves. The first lens group includes a first positive lens disposed to be closest to the object side, a second positive lens disposed closer to the image side than the first positive lens, and an LA lens disposed closer to the image side than the second positive lens. Assuming that a partial dispersion ratio and an Abbe number thereof are respectively θgFA and νA, the LA lens satisfies 0.02<θgFA+0.001618×νA−0.6415<0.1. The imaging lens satisfies predetermined conditional expressions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.