Optical article having a reflective coating with high abrasion-resistance
US12345905B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Dec 18, 2019 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Jun 6, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an optical article including a substrate having at least one main face coated with a reflective coating including a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less, in which the thicknesses of the layers in the reflective coating have been optimized according to specific design rules in order to boost the abrasion resistance of the optical article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.