OPTICAL FILM, IMAGE DISPLAY, DIETHYNYL FLUORENE AND POLYMER OF THE DIETHYNYL FLUORENE

摘要

The optical film of the present invention comprises a polyimide polymer represented by the following formula (5). ; [Formula 5] ; The optical film of the present invention shows the optical characteristics of the retardation wavelength dispersion is hardly changed over the long wavelength side from the short wavelength side. The optical film of the present invention can be used as a retardation film of typically a liquid crystal display device,.