| 摘要 |
The optical element includes a substrate and optical thin film formed in multiple layers on the surface of the pertinent substrate, wherein the optical thin film is provided with low refractive index layers composed of material with a lower refractive index than that of the substrate, and high refractive index layers of which at least 1 layer is composed of material whose primary component is oxide and which have a refractive index higher than that of the low refractive index layers, and wherein at least 1 layer of the optical thin film composed of low refractive index layers and high refractive index layers contains at least one of metal ions selected from among Cu, Fe, Au, Ag, Cr, Mn, Co, and Ni.
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