Coated multilayer optical barrier
US11885983B1 · kind B1 · utility
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5References
9Claims
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Key dates
| Filing date | Dec 7, 2020 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Oct 1, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A liquid lens includes a transparent substrate, a multilayer polyurethane-based membrane overlying the transparent substrate, and a liquid layer disposed between and abutting the transparent substrate and the multilayer polyurethane-based membrane. The multilayer polyurethane-based membrane, which may include thermoplastic and/or thermoset polymer layers, may be formed by slot die coating or gravure coating one or more constituent layers and may exhibit a reversible elastic response to imposed strains of up to approximately 5% while limiting the transpiration of fluid therethrough to less than approximately 10−2 g/m2/day.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.