Imaging lens and imaging apparatus
US12253658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2021 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Aug 18, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens includes a front group having negative power, an aperture stop, and a rear group having positive power, in order from an object side. In the front group, a first lens surface has a convex shape toward the object side. In the rear group, a second lens surface has a convex shape toward the object side, a third lens surface has a convex shape toward the image side, and the third lens surface has an infrared ray cut coat. A curvature radius of the second lens surface is represented by Rr, a curvature radius of the third lens surface is represented by Re, a distance from the second lens surface to the third lens surface on an optical axis is represented by Da, and the following condition is satisfied: 1.6<(Rr+|Re|)/Da<2.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.