Optical article coated with an antireflection or reflective...

Details Optical article coated with an antireflection or reflective... Optical article coated with an antireflection or reflective...

G - Physics

02

B

G02B 1/10 (2006.01) G02B 1/11 (2006.01)

Patent

CA 2757168

The invention relates to an optical article having antistatic properties and antireflection or reflective properties, comprising a substrate having at least one main surface coated with an antireflection or reflective coating. The aforementioned coating comprises at least one electrically conductive film containing at least 30% tin oxide (SnO2) by weight relative to the total weight of the electrically conductive film, said electrically conductive film having been deposited by ion-assisted deposition. The substrate has a water uptake equal to or greater than 0.6% by weight relative to the total weight of the substrate, said water uptake being measured following the predrying of the substrate and the subsequent storage of same for 800 hours in a chamber at 50°C under 100% relative humidity and atmospheric pressure.

L'invention concerne un article d'optique à propriétés antistatiques et antireflet ou réfléchissantes, comprenant un substrat ayant au moins une surface principale revêtue d'un revêtement antireflet ou réfléchissant, ledit revêtement comprenant au moins une couche électriquement conductrice comprenant au moins 30% % en masse d'oxyde d'étain (SnO2) par rapport à la masse totale de la couche électriquement conductrice, le dépôt de ladite couche électriquement conductrice ayant été réalisé sous assistance ionique, et ledit substrat ayant un taux de reprise en eau supérieur ou égal à 0,6 % en masse par rapport à la masse totale dudit substrat, le taux de reprise en eau étant mesuré après séchage préalable dudit substrat puis stockage de ce substrat pendant 800 heures dans une enceinte à 50 °C sous une humidité relative de 100 % et à pression atmosphérique.

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