MOLD FOR MOLDING HIGH-PRECISION PRISM, METHOD FOR MANUFACTURING THE SAME AND METHOD FOR MANUFACTURING HIGH-PRECISION PRISM

摘要

PROBLEM TO BE SOLVED: To obtain a low-cost prism by realizing cost reduction and stability of dimensional accuracy of a mold in simultaneously molding three surfaces of a prism with the mold composed of crystallized glass replicated with a master block. SOLUTION: Replica molding is carried out by using the crystallized glass with high heat resistance as a mold material. Thereby both cost reducing effect owing to the molding and cost reduction owing to the stability of the dimensional accuracy are made possible and furthermore, contribute to the cost reduction of the prism.