Optical imaging lens
US9933602B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2017 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Jul 16, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical imaging lens includes a first lens of an image-side surface with a concave portion in a vicinity of its optical-axis, a second lens of an object-side surface with a convex portion in a vicinity of its optical-axis, a third lens of an image-side surface with a concave portion in a vicinity of its optical-axis, a fifth lens of negative refractive power and with a thickness along its optical-axis larger than that of the second lens. EFL is the effective focal length of the optical imaging lens, TTL is the distance from the object-side surface of the first lens element to an image plane, ALT is a total thickness of all five lenses, the second lens has a second lens thickness T2 and an air gap G34 is between the third lens element and the fourth lens element along the optical axis to satisfy TTL/EFL≤1.000, TTL/G34≤12.000 and ALT/T2≤12.900.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.