Advanced processing of the Zerodur R glass ceramic

Thomas A. Marx

doi:10.1117/12.48309

1 November 1991 Advanced processing of the Zerodur® glass ceramic

Thomas A. Marx

Proceedings Volume 1535, Passive Materials for Optical Elements; (1991) https://doi.org/10.1117/12.48309
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The Zerodur glass ceramic is an extraordinary material possessing a very low thermal expansion over a broad temperature range. Depending on the size of the castings, a continuous or a discontinuous melting technology is used in the manufacture of Zerodur. Continuous melters are being operated regularly in Germany and recently in the United States. The latest generation of discontinuous melters started production of 8.2 m spincast telescope blanks in early 1991. Zerodur fusion is a special process to generate lightweighted mirror blanks and special components. It requires glassy material and generates bonds that are as strong as the bulk material. Further process development such as waterjet cutting and insertion technologies are underway and may generate components of unique shapes and performance.

Citation Download Citation

Thomas A. Marx "Advanced processing of the Zerodur® glass ceramic", Proc. SPIE 1535, Passive Materials for Optical Elements, (1 November 1991); https://doi.org/10.1117/12.48309

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