| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical film which has a low phase difference and has excellent heat resistance, strength and flexibility, and has an acrylic polymer. <P>SOLUTION: In the optical film which has an acrylic polymer (A) including an N-benzylmaleimide unit (a) and a (meth)acrylic acid ester unit (b) as a constitutional unit, the optical film is formed by biaxial stretching so that an in-plane retardation Re is set at 0 to 5 nm, and a retardation Rth in a thickness direction is set at -5 nm to 5 nm. <P>COPYRIGHT: (C)2013,JPO&INPIT |
