US Patent 8088502 Nanostructured thin film optical coatings

A durable coating made up of superimposed microlayers of preselected materials, and a method of making and utilizing such a coating. In one embodiment of the invention, at least 200 microlayers of at least one transparent material, having a thickness of less than 50 nms are superimposed in a sequential manner so as to obtain a desired arrangement between the layers. This structure then forms a transparent coating that has strength characteristics that are substantially greater than the strength of a layer of the coating material alone.