Essilor International (Compagnie Generale D'optique)

Essilor International

Michele Thomas

Olivier Beinat

Jean-Louis Sirjean

Yvon Helmstetter

Philippe Roisin

Alain Arnal

The invention relates to an optical article having antireflection properties, optionally antistatic properties, having a high thermal and abrasion resistance, as well as the method for producing the same. The article of the invention comprises a substrate and, starting from the substrate:

Optical article coated with a sub-layer and with a heat-resistant, multilayered antireflection coating, and method for producing same

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.

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

The invention relates to an optical article comprising a transparent substrate made of organic or inorganic glass, with main front and rear faces, at least one of said main faces comprising a multi-layer anti-reflection coating, wherein said anti-reflection coating comprises at least two visible-absorbing layers comprising a sub-stoichiometric titanium oxide, the visible-absorbing layers being such that the relative transmission factor of visible light Tv is reduced by at least 10% compared with the same article not comprising said visible-absorbing layers.

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Charenton le Pont, France

Michele Thomas