| http://www.w3.org/ns/prov#value | - The mirror assembly of claim 18 wherein said first element is glass; said gradient refractive index layer being a porous, skeletonized surface coating on said glass first element formed from a dispersion including a solution having at least one metallo-organic compound and at least one organic polymer, the dispersion being applied by dip application followed by heating to drive off the solvent, th
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