Anti-reflection coatings and coated articles

G - Physics – 02 – B

Patent

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G02B 1/11 (2006.01)

Patent

CA 2380595

Coated optical substrates and a method of coating optical substrates with anti- reflective (AR) coatings are described. The composition of the coating is determined by material constraints such as adhesion, durability, ease of manufacture, and cost. The thickness of one or more layers of AR material is determined by minimizing the product of the Fresnel reflection coefficients for the coated article with the angle- and wavelength-dependent sensitivity of the human visual system. Preferred designs have a value of perceived reflectance, F, less than or equal to 1.25 F min is the minimized perceived reflectance for the coated article. Coatings which have minimal perceived reflection while maintaining reflections with desired visually perceived colors are also described.

La présente invention concerne des substrats optiques revêtus et un procédé de revêtement de substrats optiques de revêtement antireflet. La composition du revêtement est déterminée par des contraintes matérielles telles que l'adhésion, la durée de vie, la facilité de fabrication, et le prix. L'épaisseur de l'une au moins des couches de matériau antireflet est déterminée en minimisant le produit des coefficients de réflexion de Fresnel pour l'article revêtu avec une sensibilité du système visuel humain réagissant à l'angle et la longueur d'ondes. Les modèles préférés ont une valeur de réflectance perçue, F, inférieure ou égale à 1,25 Fmin qui est la réflectance perçue minimisée correspondant à l'article revêtu. L'invention concerne également des revêtements qui ont une réflexion perçue minimale tout en conservant les réflexions avec des couleurs visuellement perçues désirées.

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