Large-field-of-view achromatic lens
US9791664B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 22, 2013 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Oct 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A large filed achromatic lens is disclosed, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element arranged sequentially along the propagation direction of an incident ray. The first lens element is a meniscus lens element including a first curved surface and a second curved surface; the second lens element is a meniscus lens element, including a third curved surface and a fourth curved surface; the third lens element is a biconvex lens element, including a fifth curved surface and a sixth curved surface; the fourth lens element is a biconvex lens element, including a seventh curved surface and an eighth curved surface; the fifth lens element is a biconcave lens element including a ninth curved surface and a tenth curved surface; and the sixth lens element is a plane lens element adapted to play a role in protecting other lens elements. The first to the fifth lens elements are arranged around a same axis sequentially along the propagation direction of an incident ray. The first to the tenth curved surfaces are arranged sequentially along the propagation direction of the incident ray. The abo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.