| abstract |
A method of manufacturing an optical film by a solution casting method, in which a poor peeling region of a metal support can be eliminated by casting a dope on the surface of the metal support after a surface treatment film is formed on the surface of the metal support by atmospheric pressure plasma treatment or excimer UV treatment. Consequently, limitation on the conditions of film production is reduced and productivity is enhanced. Furthermore, since peeling of the film is enhanced, lateral variation in peeling position is reduced and variation in retardation value is reduced sharply, and thereby an optical film having optical characteristics excellent in transparency and flatness can be manufactured. Consequently, a method for manufacturing an optical film, an optical film, a polarizing plate and a display device which meet the demands of a high quality thin and wide protective film for polarizing plate can be provided. |