Photographic objective lens
US9983390B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2014 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Oct 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic objective lens includes seven lenses, wherein a first lens is a meniscus lens, a second lens is a meniscus lens, a third lens is a meniscus lens, a fourth lens is a biconcave lens, a fifth lens is a biconvex lens, a sixth lens is a biconvex lens, a seventh lens is a meniscus lens. The first lens has a first curved surface and a second curved surface, the second lens has a third curved surface and a fourth curved surface, the third lens has a fifth curved surface and a sixth curved surface, the fourth lens has a seventh curved surface and a eighth curved surface, the fifth lens has a ninth curved surface and a tenth curved surface, the sixth lens has a eleventh curved surface and a twelfth curved surface, and the seventh lens has a thirteenth curved surface and a fourteenth curved surface; wherein the first curved surface to the fourteenth curved surface are sequentially arranged along a transmission direction of incident light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.