LIGHT DIFFUSION FILM, POLARIZATION PLATE, IMAGE FORMING APPARATUS, AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a light diffusion film that is relatively easily manufactured, and can be imparted with desired diffusion characteristics.SOLUTION: A light diffusion film 30 diffuses transmitted light. The light diffusion film 30 includes diffraction grating elements 40 that are formed of grating patterns 41 having periodicity for respective two directions d1 and d2 extending along a film surface of the light diffusion film.