Optical base film is made of PET through drying, casting, coating, biaxial stretching and other processes. After post-processing and composite production, the optical base film can be processed into brightness enhancement film (prism), reflective film, diffusion film, polarizing film and other composite films with higher technical difficulty. The reflective film can reflect the light source, the prism structure on one side of the prism film can enhance the brightness, and the diffusion film can make the light source uniform. Our company has large optical film cutting machines and a thousand-level clean room, which can process different types of optical film products.