Mold and method for manufacturing fresnel lens

A method for manufacturing a Fresnel lens, the method comprising:

• providing a mold comprising a carrying holder and a mold core comprising a bottom side surface adjacent to the carrying holder, a top side with a molding structure, and a plurality of through holes connected between the molding structure and the bottom side surface, wherein the carrying holder further comprises a plurality of pumping holes connected with the through holes;
• setting a separation membrane on surface of the molding structure;
• pumping air between the molding structure and the separation membrane to make the separation membrane contact securely with the molding structure;
• pressing a melted molding material placed on the molding structure via a press mold plate until a pressing surface of the press mold plate contacts the melted molding material;
• and
• solidifying the melted molding material to get a Fresnel lenses.