Optical imaging system
US10520707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Aug 15, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical imaging system includes a reflector, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element from an object side to an image side in order along an optical axis. The first lens element to the fifth lens element each include an object-side surface and an image-side surface. The object-side surface of the second lens element has a convex portion in a vicinity of a periphery of the second lens element, and the image-side surface of the second lens element has a concave portion in a vicinity of the optical axis. The image-side surface of the fourth lens element has a convex portion in a vicinity of the optical axis, and the object-side surface of the fifth lens element has a concave portion in a vicinity of a periphery of the fifth lens element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.