OPTICAL FILM, METHOD FOR PRODUCING SAME, AND POLARIZER PLATE, LIQUID CRYSTAL DISPLAY DEVICE, AND POLARIZED LIGHT PROJECTOR SCREEN PROVIDED WITH OPTICAL FILM

摘要

[Problem] To provide an optical film which has a superior brightness enhancement effect and which enables one orthogonal polarized light component to be transmitted and another polarized light component to be scattered. [Solution] This optical film comprises an optically isotropic continuous phase and an optically anisotropic dispersion phase, and is characterized in that the optically anisotropic dispersion phase comprises a liquid crystal polymer, and a ratio L1/L2 is 15 or higher where L1 is the mean Feret diameter of the optically anisotropic dispersion phase in one direction D1 of in-plane directions of the optical film and L2 is the mean Feret diameter of the optically anisotropic dispersion phase in a direction D2 orthogonal to the direction D1.