Optical imaging lens set
US10107990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2017 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | Jun 9, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens set includes: a first, second, third, fourth and fifth lens element, an aperture stop disposed between said first and second lens element, said first lens element has negative refractive power, and has an object-side surface with a convex part in a vicinity of its periphery, said third lens element has an image-side surface with a concave part in a vicinity of its periphery, said fourth lens element has an object-side surface with a concave part in a vicinity of its periphery, said fifth element has aspherical object-side and image-side surfaces. T1, T2 and T5 are the thicknesses of said first, second and fifth lens element along the optical axis respectively, G12 and G23 are an air gaps between said first and second lens element, and between said second and third lens element along said optical axis respectively, the optical lens set satisfies the relationships: (G12+T2)/T1≤2.9 and (T1+T5+G23)/T2≤1.9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.