| abstract |
A polymer film that has an in-plane retardation Re (λ) and a thickness-direction retardation Rth (λ) satisfying formula (i) and (ii), and that further has a surface energy of at least one surface is from 50 mN/m to 80 mN/m: (i) 0≦Re (630)≦10, and |Rth (630) |≦25; and (ii) |Re (400) −Re (700) ≦10, and |Rth (400) −Rth (700) |≦35. in the formulae, Re (λ) and Rth (λ) are measurement values at the wavelength of λ nm, and an optically-compensatory film, an optical material such as a polarizer and a liquid-crystal display device using the polymer film. |