High contrast optical film having specified transmittance and reflectance of polarized light
US11493677B2 · kind B2 · utility
2Cited by
14References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2018 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Dec 30, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133536
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical films are disclosed that include a plurality of interference layers. Each interference layer reflects or transmits light primarily by optical interference. The total number of the interference layers is less than about 1000. For a substantially normally incident light in a predetermined wavelength range, the plurality of interference layers has an average optical transmittance greater than about 85% for a first polarization state, an average optical reflectance greater than about 80% for an orthogonal second polarization state, and an average optical transmittance less than about 0.2% for the second polarization state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.