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1 July 1990 Replicated mirros with magnetic steel as substrates
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Proceedings Volume 1319, Optics in Complex Systems; (1990)
Event: 15th International Optics in Complex Systems, 1990, Garmisch, Germany
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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Youqin Bie "Replicated mirros with magnetic steel as substrates", Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990);

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