Article coated with an antireflective coating having improved optical properties
US12210136B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2020 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | Jan 22, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is an optical article including a substrate having a front main face and a rear main face, the rear main face being coated with a multilayer antireflection coating. The outermost layer of the multilayer antireflection coating is a layer A containing silicon, carbon and fluorine atoms, the layer A having a refractive index lower than or equal to 1.45 and a thickness higher than or equal to 20 nm. The mean light reflection factor Rv on the rear main face between 380 nm and 780 nm is lower than or equal to 1.5%. The mean reflection factor Ruv on the rear main face between 280 nm and 380 nm, weighted by the function W (2) defined in the ISO 13666:1998 standard, is lower than or equal to 7%, for an angle of incidence of 35°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.