Optical lens
US10191251B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2016 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Sep 30, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4211
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens includes a first lens group with negative refractive power, a second lens group with positive refractive power, and an aperture stop disposed between the first lens group and the second lens group. A number of lenses with refractive power of the first lens group is smaller than three, and a number of lenses with refractive power of the second lens group is smaller than five. The second lens group has a lens with a diffractive optical surface, and the lens with a diffractive optical surface satisfies the condition: 0<|(Φd*V)/Φr|<2, where Φd denotes refractive power of the diffractive optical surface, Φr denotes refractive power of the lens, and V denotes an Abbe number of the lens with a diffractive optical surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.