Optical Film, Optical Compensation Film, Polarizing Plate, and Liquid-Crystal Display Device
                        
                            
                                申请人:Nagai Michio
                            
                            
                                公开号:US20080291369A1
                            
                            
                                公开(公告)日:2008-11-27
                            
                            An optical film comprising a transparent support and an optically-anisotropic layer formed of a composition comprising at least one liquid-crystal compound, wherein the transparent support comprises at least one selected from cycloolefin-base homopolymers and copolymers, and the optically-anisotropic layer satisfies the following relation (1): Re(450)/Re(650)<1.25, is disclosed. An optical compensation film comprising a transparent support, and an optically-anisotropic layer formed of a composition comprising a liquid-crystal compound, wherein the transparent support comprises a polymer having at least either of lactone ring unit or glutaric anhydride unit, is also disclosed.