Optical film and display device

An optical film comprising a plurality of optical elements,

• wherein
• the optical elements are arrayed in a first direction and a second direction that are parallel with a film surface and that intersect each other,
• each of the optical elements either projects toward one side or another in a direction normal to the film surface to have side surface between distal ends and proximal ends or is depressed toward one side or another in the direction normal to the film surface to have side surface between falling edges and base ends,
• the side surface include two first element side surfaces that are opposite to each other and two second element side surfaces that are opposite to each other in a direction orthogonal to a direction in which the two first element side surfaces are opposite to each other,
• directions respectively normal to the two first element side surfaces are nonparallel with a surface including the first direction and the direction normal to the film surface and a surface including the second direction and the direction normal to the film surface, and/or directions respectively normal to the two second element side surfaces are nonparallel with the surface including the first direction and the direction normal to the film surface and the surface including the second direction and the direction normal to the film surface.