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US 12,138,875 B2Granted
Methods for preparing functional optical films
AssigneeEssilor International
InventorZbigniew Tokarski
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Abstract
The disclosure provides post-production methods for functionalization of optical quality films produced by top tier manufactures. The methods disclosed herein allow for the incorporation of different additives into existing films.
Claims13
An optical article comprising a functionalized optical film prepared by:
- providing a first film having a smooth surface and a non-polished surface opposite the smooth surface;
- providing a solution comprising a solvent, and a solute comprising at least one functional additive;
- applying the solution onto the non-polished surface of the first film to form a coated first film surface;
- optionally, evaporating at least a portion of the solvent;
- combining the first film with a second film to produce a laminate comprising inwardly-facing first film and second film non-polished surfaces, wherein the first film and second film non-polished surfaces are contacting the solute, resulting in the laminate having smooth outward-facing surfaces;
- and
- combining a third film with the laminate to create a second laminate having the second film disposed between the first film and the third film;
- wherein at least a portion of the solute is embedded below the first film surface.
5 more elements
Dependencies are inferred from the claim text.