Polarization-independent diffractive optical structures
US11175441B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2019 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Jan 26, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4205
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Diffractive optical structures, lens, waveplates, systems and methods of combinations of CDWs (cycloidal diffractive waveplates) and PVGs (polarization volume gratings) that result in high efficiency polarization-insensitive diffraction. Although our modelling and experiments were performed for structures with optical axis orientation periodic along one of the Cartesian coordinates parallel to the plane of the structure, the results are applicable to more complex structures such as diffractive waveplate lenses. The focusing performance of such structures can be predicted by considering the structure to be locally periodic along one axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.