| 摘要 |
An optical film used as a lens comprises at least a plastic layer (1) and a photochromic layer (2), the photochromic layer (2) is boned between two plastic layers (1) such that avoiding non-uniform dyeing and preventing the photochromic layer (2) from breaking off. One of a Polarizing layer (3), a UV absorbing layer (4) and a dying layer (5) or any combination of them can be also bonded between the two plastic layers (1).
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