| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical retardation film with an improved viewing angle characteristics utilizing a polycarbonate with excellent heat resistance, moldability or the like. SOLUTION: The polycarbonate laminated optical retardation film is characterized by being a laminated body comprising an optical retardation film which has a three dimensional refractive index at 550 nm wavelength satisfying the relation 1, is composed of polycarbonate, for example one having a fluorene skeleton with a methyl group as a main constituent and has negative birefringence and an optical retardation film which has a three dimensional refractive index at 550 nm wavelength satisfying the relation 2, is composed of polycarbonate and has positive birefringence nx<nz the relation 1 nx>nz the relation 2 (in the relations 1, 2 nx expresses the refractive index of the main stretching direction in the film plane and nz expressed the refractive index in the direction normal to the film plane). |
