Optical Article Coated with an Antireflection Coating Comprising a Sublayer Partially Formed under Ion Assistance and Manufacturing Process
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Abstract
The invention relates to an optical article provided with antireflection properties, comprising a substrate having at least one main surface coated with an antireflection coating comprising, starting from the substrate:
- a sub-layer comprising two adjacent layers formed from the same material, the sum of the thicknesses of the two adjacent layers being greater than or equal to 75 nm; and
- a multilayered antireflection stack comprising at least one high refractive index layer and at least one low refractive index layer,
- the deposition of the first of said two adjacent layers of the sub-layer having been carried out without ion assistance and the deposition of the second of said two adjacent layers of the sub-layer having been carried out under ion assistance.
The invention also relates to a process for manufacturing such an optical article.
37 Citations
52 Claims
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1-23. -23. (canceled)
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24. An optical article with antireflection properties, comprising a substrate having at least one main surface coated with an antireflection coating comprising, starting from the substrate:
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a sub-layer comprising two adjacent layers, the sum of the thicknesses of the two adjacent layers being greater than or equal to 75 nm; and a multilayered antireflection stack comprising at least one high refractive index layer and at least one low refractive index layer, wherein the deposition of the first of the sub-layer two adjacent layers has been carried out without ion assistance and the deposition of the second of the sub-layer two adjacent layers has been carried out under ion assistance. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A process for manufacturing an optical article with antireflection properties, comprising:
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providing an optical article comprising a substrate having at least one main surface; depositing onto a main surface of the substrate a sub-layer having an exposed surface, where the sub-layer comprises two adjacent layers, the sum of the thicknesses of the two adjacent layers being greater than or equal to 75 nm; depositing onto the exposed surface of the sub-layer a multilayered antireflection stack comprising at least one high refractive index layer and at least one low refractive index layer, recovering an optical article comprising a substrate having one main surface coated with an antireflection coating comprising the sub-layer and the multilayered stack, wherein the deposition of the first of the sub-layer two adjacent layers is carried out without ion assistance and the deposition of the second of the sub-layer two adjacent layers is carried out under ion assistance. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification