Optical Article Having an Interferential Coating with an Improved Abrasion-Resistance
The invention relates to an optical article comprising a substrate having at least one main face successively coated with a layer comprising chromium, silicon and oxygen, a monolayer sub-layer having a thickness higher than or equal to 100 nm, a multilayer interferential coating comprising a stack o...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention relates to an optical article comprising a substrate having at least one main face successively coated with a layer comprising chromium, silicon and oxygen, a monolayer sub-layer having a thickness higher than or equal to 100 nm, a multilayer interferential coating comprising 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, wherein the ratio (I) is higher than or equal to 1.5, and the optical article has a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7.RD=thicknessoftheoutermostlowrefractiveindexlayer(s)oftheinterferentialcoatingthicknessoftheoutermosthighrefractiveindexlayer(s)oftheinterferentialcoating(I) |
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