Optical system and image pickup apparatus including the same
US10649184B2 · kind B2 · utility
0Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2016 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Sep 29, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
At least one embodiment of an optical system includes, in order from an object side to an image side, a front unit having a plurality of lenses, an aperture stop, and a rear unit having a positive refractive power. In at least one embodiment, a positive lens and three or more negative lenses are disposed in the front unit, and the material of negative lenses included in the front unit, the focal length of the front unit, and the focal length of the entire optical system are set appropriately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.