Proceedings PaperReplicated mirros with magnetic steel as substrates
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As the sagnetic steel used for the substrate of the mirror is shaped by casting, there are some cracks and blowho].es in its interior. If the magnetic steel mirror is ground by the traditional method, cracks and blowholes aight appear and the ground mirror would become a waste. Besides these, magnetic steel is very easy to be corroded during the grinding period, so that there is a lot of repairing work invalved and the utilization ratio of this magnetic steel substrate is only 25%. Whereas the magnetic steel mirror made by the replicating aethod has no such defects; not only the productive efficiency has been increased, but has the utilization ratio also been increased by 95%; the precision of the surface shape of each mirror has good consistence.