Abstract: A multilayer optical film structure and a method of manufacturing the same are provided. The multilayer optical film structure includes a base layer, a first optical structure and a second optical structure. The base layer has a first surface and a second surface. The first optical structure is disposed on the first surface of the base layer. The second optical structure is disposed on the second surface of the base layer, and includes a first structural layer, a second structural layer and a third structural layer. The first structural layer is located between the base layer and the second structural layer, and the second structural layer is located between the first structural layer and the third structural layer. The difference between the refractive index of the first structural layer and the refractive index of the second structural layer is greater than or equal to 0.1.

Abstract: An optical film and a light emitting module using the same are disclosed. The light emitting module includes a light emitting assembly and an optical film. The light emitting assembly includes a substrate and a plurality of light emitting units disposed on the substrate. The optical film is disposed above the light emitting units, and includes a base layer and a first optical structure. The first optical structure is disposed on the base layer and includes a first high refractive index layer and a first low refractive index layer. The first high refractive index layer is located between the light emitting assembly and the first low refractive index layer. The first inclined surfaces are formed on an interface between the first high refractive index layer and the first low refractive index layer. Each first inclined surface is inclined relative to a thickness direction of the base layer.