High contrast inverse polarizer
US10234613B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2017 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Aug 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An embedded, inverse wire-grid polarizer (WGP) includes ribs 13 located over a surface of a transparent substrate 11, gaps 16 between the ribs 13, and a fill-layer 15 substantially filling the gaps 16. The fill-layer has a relatively high index of refraction, such as greater than 1.4. At a wavelength of light incident upon the WGP, E∥ transmission can be greater than E⊥ transmission. E∥ is a polarization of light with an electric field oscillation parallel to a length L of the ribs, and E⊥ is a polarization of light with an electric field oscillation perpendicular to a length L of the ribs. This embedded, inverse WGP is especially useful for polarizing, with high WGP performance, small wavelength (high-energy) regions of the electromagnetic spectrum (e.g. UV) which are difficult to polarize with conventional WGPs (E⊥ transmission>E∥ transmission).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.