PURPOSE: A method of manufacturing an optical element is provided to generate a problem of the difference of refractive index and adhesive strength by forming the device with Poly Methyl Methacrylate. CONSTITUTION: A Methyl Methacrylate is coated on the one-side of a substrate(100) consisting of the polymethyl methacrylate by a desired pattern. A mold of the desired pattern is contacted to the coated methylmethacrylate. The substrate consisting of the polymethyl methacrylate is laminated on methylmethacrylate. The methylmethacrylate coated by a desired pattern is made through polymerization and the polymethyl methacrylate(100a) of the semi-hardened state. The polymethyl methacrylate of the semi-hardened state is completely hardened.
