| 摘要 |
<p>An optical film includes a multi-layer sheet having a plurality of polyethylene terephthalate polymer layers, the polymer layers having a first refraction index in a first direction parallel to a plane of the polymer layers and a second refraction index in a second direction parallel to the plane of the polymer layers, and a plurality of polyethylene terephthalate copolymer layers, the copolymer layers having a third refraction index in both the first and second directions, and a protection sheet directly on at least one side of the multi-layer sheet.</p> |
