Optical lens
US10809493B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Aug 10, 2017 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Feb 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens includes two lens groups and an aperture stop. A total number of lenses with refractive power of the two lens groups is larger than three, and the two lens groups includes an aspheric lens with negative refractive power. The aperture stop is disposed between the two lens groups. The optical lens satisfies the following condition: 0.05>[y(θ)−(EFL*sin θ)]/(EFL*sin θ)>−0.3, where θ denotes a half field of view, y(θ) denotes an image height of an image plane for visible light with respect to the half field of view θ, and EFL denotes an effective focal length for visible light of the optical lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.