Optical lens
US11307390B2 · kind B2 · utility
0Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2018 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Aug 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/146
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in order from a magnified side to a minified side. A sum of refractive powers of the first lens and the second lens is negative, and a sum of refractive powers of the third lens, the fourth lens and the fifth lens is positive. The first lens is a glass lens with a negative refractive power, the second lens is a plastic lens, and the third lens, the fourth lens and the fifth lens are composed of one glass lens with an Abbe number of larger than 60 and two plastic lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.