The glass molding process is considered to have a great potential for the mass production of aspherical and free form glass lenses with high precision and lower cost. In glass molding process, the die surfaces are exposed to the chemically active glass an The glass molding process is considered to have a great potential for the mass production of aspherical and free form glass lenses with high precision and lower cost. In glass molding process, the die surfaces are exposed to the chemically active glass an