Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10673618 | CIRP Annals - Manufacturing Technology | 2008 | 4 Pages |
Abstract
Electroless nickel is one of the best materials for making optical molding dies, because of its machinability with both single-point diamond turning and polishing, as well as its suitable hardness and durability. This paper deals with the ultra-precision polishing of aspheric molding dies for next-generation hard X-ray telescope mirrors, which require a super smooth surface with a roughness below 0.3Â nm root-mean-square (rms). The material was machined using various methods, and a surface roughness of 0.23Â nm rms was obtained on aspheric molding dies of 300Â mm in diameter. A surface roughness of 0.16Â nm rms was achieved on platinum/carbon multilayer mirrors, replicated from plano dies.
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Authors
Y. Namba, T. Shimomura, A. Fushiki, A. Beaucamp, I. Inasaki, H. Kunieda, Y. Ogasaka, K. Yamashita,