Zerodur, the glass ceramic, with CTE values near zero, has excellent performance up to 8.2m primary mirrors as well as for lightweight (LW) mirrors for Secondaries and Tertiaries. The high homogeneity of major properties of Zerodur is an important prerequisite for the LW production and application. The production by CNC grinding and subsequent lightening via acid etching for additional weight reduction is discussed in this paper.
Origin
Schott Glaswerke, Germany
Journal Title
Schott Research 1996-1998 65-75
Sector
Special Glass
Class
S 1816