Lens assembly including six lenses of −−++−+ refractive powers
US11314043B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 2, 2019 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Jan 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is with negative refractive power. The second lens is with negative refractive power. The third and fourth lenses are with positive refractive power. The fifth lens is with negative refractive power. The sixth lens is with positive refractive power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from an object side to an image side along an optical axis. The lens assembly satisfies: 4.9≤TTL/f≤11.5; wherein TTL is an interval from an object side surface of the first lens to an image plane along the optical axis and f is an effective focal length of the lens assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.