Optical film, method for producing optical film, optically-compensatory film, polarizing plate and liquid-crystal display device

摘要

An optical film comprising: a resin material; and an additive in an amount of at least 0.3% by mass based on the resin material, wherein when the optical film is divided into 10 equal portions in a thickness direction of the optical film, an amount of the additive existing in each of 8 portions excepting the two outermost layer portions of the 10 equal portions is from 80 to 120% based on a mean additive amount in an entire optical film; a method for producing it; an optically-compensatory film, a polarizing plate and a liquid-crystal display device that comprise the optical film.