MOLD FOR MOLDING GLASS LENS

摘要

PROBLEM TO BE SOLVED: To provide a mold for molding capable of giving glass lens a glass lens having a stable shape and a stable surface precision and no air bubbles or the like in it. SOLUTION: The glass lens forming mold, against which a glass preform softened by heating is pressed, has a forming face whose arithmetic average roughness (Ra) as defined by JIS B 0601 is 3 to 6μm.