RETARDATION FILM, PROCESS FOR PRODUCING THE SAME, OPTICAL FUNCTIONAL FILM, POLARIZING FILM AND DISPLAY APPARATUS

摘要

A retardation film that is free from problems such as detachment of a retardation layer from base material experienced in the formation of retardation layers, realizing high reliability, and that even with a small quantity, enables easy attainment of any arbitrary retardation value, and that realizes satisfactory adhesion to hydrophilic films as a polarizing layer, etc. There is provided a retardation film comprising a polymer film containing a material with refractive index anisotropy, characterized in that the material with refractive index anisotropy has a concentration gradient across the thickness of the polymer film.