| abstract |
Provided is a retardation film comprising a polymer film, and, disposed thereon, an optically-anisotropic layer, of which thickness is equal to or less than 5 nm, of which in-plane retardation at a wavelength of 550 nm, Re (550), is from 0 to 10 nm, and of which thickness-direction retardation at the same wavelength, Rth (550), is from 250 to 450 nm; and satisfying the following formula: 1.00 ≤ Rth (450)/Rth (550) ≤ 1.07 or 1.04 ≤ Rth (450)/Rth (550) ≤ 1.09. |