| abstract |
The present invention relates to an optical film comprising: a base material film; and a primer layer on at least one surface of the base material film, the primer layer containing a polyester resin and water-dispersible microparticles, and combined with the base material film The difference in refractive index is 0.03 or less, wherein the polyester resin includes polyester diol formed by the reaction of a polybasic acid and a polyhydric alcohol, the polybasic acid including an aromatic carboxylic acid compound in a molar ratio of 1:9 to 9:1 and an aliphatic carboxylic acid compound, the optical film is excellent in adhesion between the functional coating, and due to the small difference in refractive index, the rainbow phenomenon is reduced and the optical performance is excellent. |