Lens assembly
US10942337B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 29, 2018 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | May 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from an object side to an image side along an optical axis. The first lens is with positive refractive power and includes a concave surface facing the image side. The second lens is with positive refractive power and includes a concave surface facing the object side. The third lens is with negative refractive power. The fourth lens is with positive refractive power. The fifth lens is with negative refractive power. The lens assembly satisfies: f3+f4>0 mm, wherein f3 is an effective focal length of the third lens and f4 is an effective focal length of the fourth lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.