| CPC G02B 6/0053 (2013.01) [G02B 5/0242 (2013.01); G02B 6/0051 (2013.01); G02F 1/133606 (2013.01); G02F 1/133607 (2021.01)] | 8 Claims |
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1. An optical film comprising:
a prism pattern layer having one surface on which a plurality of prisms having pattern directions parallel to each other in a first direction are provided;
a first diffusion layer provided on another surface of the prism pattern layer;
a base film that is in contact with the first diffusion layer on one surface and has a molecular arrangement direction in a second direction different from the first direction; and
a second diffusion layer provided on another surface of the base film,
wherein the first direction of the prism pattern layer defines an angle of at least 30 degrees with the second direction of the base film, and
wherein the base film has multiple molecular arrangement directions causing double refraction in which a refractive index changes depending on a propagation direction of light.
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