Optical element molding method and optical material for molding optical element

摘要

An optical element molding method for molding an optical element having an asymmetrical optically functional surface by pressing a heated preform in which, after a center part of a transfer surface of a molding die and a center part of the preform are brought into contact with each other, peripheries of the center part of the preform are brought into contact with the transfer surface, to transfer the form of the transfer surface to the preform. Consequently, the optically functional surface shape can be favorably transferred to the preform.