Lens and fabrication method thereof
US11307383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2019 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Dec 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens assembly includes a first lens group, a second lens group and an aperture. The first lens group includes two lenses with refractive power. The second lens group with a positive refractive power includes at least two lenses with refractive power. The aperture is disposed between the first lens group and the second lens group. The lens assembly includes 5 to 8 lenses with refractive power. D1 is the diameter of the lens surface of the first lens group farthest from the second lens group. LT is the length on the optical axis of the lens from the lens surface farthest from the imaging plane of the lens assembly to the lens surface closest to the imaging plane of the lens assembly. IMH is the maximum imaging height of lens assembly on the imaging plane, wherein the lens assembly satisfies conditions: 3.5<LT/IMH<6, 0.65<D1/LT<0.98.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.