Patent ID: 8840973

Claim:
A retardation film comprising a cellulose derivative and a plasticizer, wherein a total haze, Htotal, and an internal haze, Hi, of the retardation film respectively meet the following conditions: 0.1%≦ H total≦0.4% and 0.02%≦ Hi≦ 0.2% and a ratio of the internal haze to the total haze, Hi/Htotal, of the retardation film meets the following condition: Hi/H total≦0.5, wherein the total haze (%) represents a haze measured according to a method of JIS K7136 (identical with ISO 14782: 1999); and the internal haze (%) represents a haze obtained by the following steps: (i) measuring a haze of the retardation film by applying glycerin on both surfaces of the retardation film and sandwiching the retardation film with two glass plates each having a thickness of 1.3 mm; and (ii) measuring a haze of the two glass plates by putting the two glass plates together on top of each other while applying glycerin between the two glass plates; and (iii) subtracting the haze obtained in step (ii) from the haze obtained in step (i) to give the internal haze.