Optical imaging system
US10082647B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2017 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | May 3, 2037 |
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 first lens element has a convex portion in a vicinity of the optical axis. The material of the second lens element is plastic material. The image-side surface of the third lens element has a convex portion or a concave portion in the vicinity of the optical axis. At least one of the object-side surface and the image-side surface of the fourth lens element is an aspheric surface. The object-side surface and the image-side surface of the fifth lens element are aspheric surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.