OPTICAL FILM, OPTICAL SHEET, SURFACE LIGHT-EMITTING BODY, AND METHOD FOR MANUFACTURING OPTICAL SHEET

摘要

PROBLEM TO BE SOLVED: To provide a member suitable for manufacturing a surface light-emitting body such as an organic EL element in which the light emitted from a light-emitting layer can be effectively extracted to the outside without forming a transparent electrode, an organic light-emitting layer or the like on a rugged structure, and to provide a member suitable for manufacturing a surface light-emitting body in which the light emitted from a light emitting-layer can be effectively extracted to the outside without requiring a complicated process of filling a rugged structure of a diffraction grating with a transparent material having a high refractive index and then flattening the surface.SOLUTION: An optical film has a rugged structure on at least one surface thereof, comprises a resin having a fluorene skeleton and has a refractive index of 1.65 or more. An optical sheet includes a layer comprising the above optical film and a layer having a different refractive index from that of the optical film, in which rugged structures of the layers fitting to each other.