SURFACE TREATMENTS FOR INCREASING TRANSMISSION AND DURABILITY OF A TRANSPARENT ARTICLES

• Main Authors: BATCHELDER, LEE, PLOUGH, DAVID, ZEIRA, EITAN, SCARMOUTZOS, LOUIS
• Format: Patent
• Language: English; French
• Published: 25.11.2004
• Edition: 7
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The reflectivity of a hardcoated optical element is reduced via modification Of the surface topography. Selective etching of the hardcoat surface in a alcoholic solution containing dissolved alkali or basic reagent results in increased transmission; yet without significantly affecting the haze or light scattering, or other desirable optical property. The durability and abrasion resistance of nano-structured optical surfaces, particularly those formed of or on polymeric substrate, are enhanced by at least one of adhering to it a fluorinated carbon molecule or other reactive lube composition as a monolayer or a thin multi-layer coating, and treatment with a surface active cross linking agent. On réduit la réflexivité d'un élément optique à revêtement dur par modification de la topographie d'une surface. La gravure sélective de la surface de revêtement dur dans une solution alcoolique contenant un réactif alcalin ou basique dissous permet d'augmenter la transmission sans toutefois affecter de manière significative le trouble ou la dispersion de la lumière ou toute autre propriété optique désirée. La durabilité et la résistance à l'abrasion de surfaces optiques nano-structurées, en particulier celles formées d'un substrat polymère ou formées sur ledit substrat, sont améliorées au moins par adhésion sur ce substrat d'une molécule de carbone fluoré ou d'une autre composition réactive de lubrifiant sous forme de monocouche ou de revêtement mince multicouche, et par traitement au moyen d'un agent de réticulation de surface actif.