Imaging lens
US10942338B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2019 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | May 2, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided an imaging lens with high-resolution which satisfies the wide field of view, the low-profileness and the low F-number in well balance, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having negative refractive power, an aperture stop, a second lens, a third lens being a double-aspheric lens, a fourth lens having positive refractive power, and a fifth lens being a double-sided aspheric lens, wherein a below expression is satisfied: −0.07<(N1−1)/(r1×f)×1000<0.07 where N1: refractive index at d-ray of the first lens, r1: curvature radius of the object-side surface of the first lens, f: focal length of the overall optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.