| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical resin film in which a wavelength dispersion of a retardation in plane and a wavelength dispersion of a retardation in thickness direction are independently controlled. <P>SOLUTION: This oriented optical resin film is characterized by containing at least an additive having a negative intrinsic birefringence and having a retardation satisfying the following relations (A) to (F): (A): 0nm<Re(546)<300nm, (B): 30nm<Rth(546)<700nm, (C) 0.1<Re(480)/Re(546)<1.0, (D): 1.0<Re(628)/Re(546)<4.0, (E) 0.8<Rth(480)/Rth(546)<4.0, and (F): 0.1<Rth(628)/Rth(546)<1.2. The optical resin film is produced by casting a polymer solution and then orienting the film without coating. <P>COPYRIGHT: (C)2007,JPO&INPIT |
