Imaging lens and image pickup apparatus
US8223245B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 2010 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Jul 31, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/146
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an imaging lens capable of improving weatherability, reducing performance degradation, and obtaining an optical performance excellent across a wide wavelength region from the visible wavelength region to the near-infrared wavelength region. An imaging lens for forming an image of visible and near-infrared light includes, in order from the object side: a front group that has a positive power; an aperture stop; and a rear group that has a negative power. In the imaging lens, the rear group includes a negative meniscus lens that is disposed closer to the object side and has a surface convex toward the object side, and a biconvex lens that is disposed closer to the image side. In addition, all the lenses constituting the imaging lens are single lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.