Apochromatic liquid crystal polarization hologram device
US12066648B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2021 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Nov 5, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device is provided. The device includes a first polarization hologram element configured to operate as a half-wave plate for a first light having a first wavelength, and as a full-wave plate for a second light having a second wavelength. The device also includes a second polarization hologram element stacked with the first polarization hologram, and configured to operate as the half-wave plate for the second light and as the full-wave plate for the first light. The first polarization hologram element is configured to forwardly diffract or transmit the first light depending on a handedness of the first light. The second polarization hologram element is configured to forwardly diffract or transmit the second light depending on a handedness of the second light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.