| 摘要 |
An optical film includes: a transparent substrate having a roughened surface with an average surface roughness Ra ranging from 40 nm to 120 nm; and an optical functional layer attached to the roughened surface of the transparent substrate. A method for making an optical film includes: (a) providing a transparent substrate having a surface; (b) roughening the surface of the transparent substrate such that the roughened surface has an average surface roughness Ra ranging from 40 nm to 120 nm; and (c) forming an optical functional layer on the roughened surface of the transparent substrate.
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