Optical lens
US9638832B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2016 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Jun 3, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0018
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens includes a lens, at least one light absorbing layer, and at least one optical membrane. The lens has a central region and a peripheral region surrounding the central region. The at least one light absorbing layer and the at least one optical membrane are disposed on the lens, located in the peripheral region and expose the central region. Each optical membranes includes at least one first layer and at least one second layer. Refraction index of the at least one second layer is lower than refraction index of the at least one first layer. The at least one first layer and the at least one second layer are stacked alternatively, and at least one of extinction coefficients of the at least one first layer and the at least one second layer within a wavelength range of visible light is larger than zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.