METHOD FOR MANUFACTURING ROD LENS

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a rod lens which is low-priced and which has high precision. SOLUTION: At least one end face of a rod-shaped vitreous material is heated at a temperature above a glass transition point of the vitreous material to be softened and deformed and the heated face is made to be a curved face form of a projection shape. Especially when the face having curved face form of the projection shape is further press-molded by a metallic die for press molding, curvature of an apex having curved face form of the projection shape is larger than curvature of an apex of the metallic die for press molding. COPYRIGHT: (C)2003,JPO