| http://www.w3.org/ns/prov#value | - Dielectric substrate 12 or slab 13 may include semiconductors, ionic crystals, covalent crystals, glasses, polycrystalline materials, amorphous materials, polymers and other organic materials, all generally characterized as transparent insulators or semiconductors, substantially transparent to optical wavelengths in the region from about 0.2 to 50.0 microns.
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