Corning Incorporated
CURVED SURFACE FILMS AND METHODS OF MANUFACTURING THE SAME

Abstract:

An optical element including an optically transparent lens which defines a curved surface having a steepness given by an R/# of from about 0.5 to about 1.0. A film is positioned on the curved surface. The film includes an index layer. A composite layer is positioned on the curved surface having a refractive index greater than the index layer. The composite layer includes HfO.sub.2 and Al.sub.2O.sub.3. The composite layer has a mole fraction X of HfO.sub.2, wherein X is from about 0.05 to about 0.95 and a mole fraction of Al.sub.2O.sub.3 in the composite layer is 1-X.