Optical system, lens module, and terminal device including seven lenses of ++−−+−−, +−+−+−−,++−++−−,++−−++− OR ++−−+−+ refractive powers
US12099256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2021 |
| Grant date | Sep 24, 2024 |
| Priority date | — |
| Expiry date | Feb 3, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens and a fifth lens, each of which has a positive refractive power. The optical system also includes multiple lenses with refractive powers. Each of the first lens, a second lens, and a seventh lens has an object-side surface which is convex at an optical axis. Each of the third lens and a fifth lens has an image-side surface which is convex at the optical axis. The seventh lens has an image-side surface which is concave at the optical axis. The seventh lens has an inflection point on the object-side surface and/or the image-side surface. The optical system satisfies the expressions tan ω/ƒ>0.21 mm−1 and Y2/Y1+Y3/Y1+Y4/Y1<3.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.