OPTICAL FILM AND METHOD FOR MANUFACTURING SAME, POLARIZING PLATE USING SAME, AND LIQUID CRYSTAL DISPLAY

摘要

Disclosed is an optical film which is characterized in that a part of the internal portion of the optical film has an N value, which is represented by the formula below, lower than the N value of the film surface. N = (nx + ny)/2 - nz In the formula, nx is the in-plane refractive index in the slow axis direction of the optically anisotropic layer; ny is the in-plane refractive index in the fast axis direction of the optically anisotropic layer; and nz is the refractive index in the thickness direction of the optically anisotropic layer.