Optical plastic molding technology, is currently the advanced technology of manufacturing plastic aspheric optical parts, including injection molding, casting molding and forming technology. Among them, the injection molding technology is mainly used to mass produce a diameter of 100 mm below the aspheric optical parts, also can manufacture the micro lens array; While casting molding and forming technology is mainly used in the manufacture of a diameter of 100 mm above the aspheric lens optical parts.