| abstract |
The present invention can provide a highly transparent optical film manufactured using, in polyethylene terephthalate (PET) which is a commonly used polyester film, particles having no difference in refractive index, thereby having a haze of 1.5% or less and particles invisible to the naked eye so as to have high transparency, thereby being suitable for an optical use and being capable of improving windability by forming a roughness of 4 nm or more. |