Optical film for 3D image apparatus for manufacturing optical film and method for manufacturing optical film Advertising board made of optical film

摘要

It has excellent optical properties and can form various three-dimensional images. Manufacture of optical films for stereoscopic images that can be widely used in various areas such as signboards, advertising exhibition halls, and exhibition boxes by forming a three-dimensional security pattern by utilizing them, and optical films capable of manufacturing these optical films quickly and efficiently An apparatus, a method for manufacturing an optical film, and a billboard made of an optical film are provided. The optical film for a stereoscopic image includes a lens array comprising a base film layer, a plurality of micro lenses protruding from one surface of the base film layer, and a gap partitioning the micro lenses so that the micro lenses are spaced apart from each other, and The ratio b/a of the thickness b of the microlens to the diameter a of the lens is 0.5 or more, and the ratio b/c of the thickness b of the microlens to the gap c is 1 or more.