Method for producing an optical article coated with an antireflection or a reflective coating having improved adhesion and abrasion resistance properties

摘要

The invention relates to a method for producing an optical article having antireflection or reflective properties and comprising a substrate having at least one main surface, comprising the step of depositing an sub-layer onto a substrate's main surface, the step of treating the sub-layer by ionic bombardment and the step of depositing onto said sub-layer a multilayered stack comprising at least one high refractive index layer and at least one low refractive index layer. According to a preferred embodiment, the deposition of the sub-layer is conducted in a vacuum chamber in which a gas is supplied during the deposition step.

主权项

1. A method for producing an optical article having antireflection or reflective properties, comprising:
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, said sub-layer comprising an SiO2-based layer including a thickness greater than or equal to 75 nm and lower than 250 nm, wherein the deposition of said SiO2-based layer is conducted without ion assistance by evaporation of SiO2 in a vacuum chamber in which at least one supplementary gas is supplied during said deposition, under a pressure of 8.10−5 to 1.5×10−4 mbar, wherein said at least one supplementary gas comprises oxygen; depositing onto said exposed surface of the sub-layer a multilayered antireflection or reflective stack comprising at least one high refractive index layer and at least one low refractive index layer; and recovering an optical article comprising a substrate having a main surface coated with an antireflection or a reflective coating comprising said sub-layer and said multilayered stack, wherein the exposed surface of the sub-layer has been submitted to an ionic bombardment treatment prior to depositing said multilayered stack, and wherein the deposition of the low refractive index layers of the multilayered stack is conducted in a vacuum chamber with no gas supply to the vacuum chamber during said coating deposition.