Patent ID: 7876502

Claim:
An optical film comprising a transparent polymer film, wherein the optical film is produced by stretching the transparent polymer film at a temperature of (Tg+25° C.) to (Tg+100° C.), Tg being a glass transition point of a polymer of the transparent polymer film, and the optical film has an A 1 value defined by equation (1) of 0.10 to 0.95 and an A 2 value defined by equation (2) of 1.01 to 1.50: A1 value=Re (450)/Re (550) (1) A2 value=Re (650)/Re (550) (2) wherein Re (λ) represents a retardation value of the optical film with respect to light having a wavelength of λ nm, wherein the transparent polymer film comprises a compound in an amount of 0.01 to 30% by weight, the compound having a maximum absorption wavelength λ max shorter than 250 nm in an ultraviolet absorption spectrum of a solution of the compound.