| http://www.w3.org/ns/prov#value | - Examples include Ta2O5, TiO2, SiO2, and the like. [0081] The non-metal oxide is not particularly limited and may be suitably selected from among non-metal oxides known in the art. [0082] The thickness of the different refractive index film (physical film thickness) is not particularly limited, and may be suitably selected according to the purpose.
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