Wafer level microstructures for an optical lens
US10473834B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2016 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Dec 2, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4811
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Various embodiments provide an optical lens that includes wafer level diffractive microstructures. In one embodiment, the optical lens includes a substrate, a microstructure layer having a first refractive index, and a protective layer having a second refractive index that is different from the first refractive index. The microstructure layer is formed on the substrate and includes a plurality of diffractive microstructures. The protective layer is formed on the diffractive microstructures. The protective layer provides a cleanable surface and encapsulates the diffractive microstructures to prevent damage and contamination to the diffractive microstructures. In another embodiment, the optical lens includes a substrate and an anti-reflective layer. The anti-reflective layer is formed on the substrate and includes a plurality of diffractive microstructures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.