Optical article covered with a visible-absorbing, multi-layer anti-reflective coating, and production method thereof
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsMichele Thomas, Alain Arnal, Yvon Helmstetter
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Abstract
The invention relates to an optical article comprising a transparent substrate which is made from organic or mineral glass and which has front and rear main faces, at least one of said faces being equipped with a multi-layer anti-reflective coating. The invention is characterised in that the anti-reflective coating consists of at least two layers which absorb in the visible region and which comprise a substoichiometric titanium oxide, said visible-absorbing layers being such that the visible light transmission factor Tv is reduced by more than 10% in relation to the same article without the visible-absorbing layers.
Claims22
-20. (canceled)
An optical article comprising a transparent substrate made of organic or mineral glass, having 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.
Dependencies are inferred from the claim text.