| 摘要 |
An exemplary optical film includes a transparent substrate having a surface, and an optical film coated on the surface of the transparent substrate. The optical film includes pure metal ions and reaction compounds mixed with the pure ions. The proportion of the ions to the reaction compounds in the optical film gradually changes along a direction from the surface of the transparent substrate to a surface of the optical film farthest from the surface of the transparent substrate. An exemplary method to form such an optical film is also provided.
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