
Proceedings Paper
ZERODUR TAILORED for cryogenic applicationFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
ZERODUR® glass ceramic from SCHOTT is known for its very low thermal expansion coefficient (CTE) at room
temperature and its excellent CTE homogeneity. It is widely used for ground-based astronomical mirrors but also for
satellite applications. Many reference application demonstrate the excellent and long lasting performance of
ZERODUR® components in orbit. For space application a low CTE of the mirror material is required at cryogenic
temperatures together with a good match of the thermal expansion to the supporting structure material.
It is possible to optimize the coefficient of thermal expansion of ZERODUR® for cryogenic applications. This paper
reports on measurements of thermal expansion of ZERODUR® down to cryogenic temperatures of 10 K performed by
the PTB (Physikalisch Technische Bundesanstallt, Braunschweig, Germany, the national metrology laboratory). The
ZERODUR® TAILORED CRYO presented in this paper has a very low coefficient of thermal expansion down to 70 K.
The maximum absolute integrated thermal expansion down to 10 K is only about 20 ppm.
Mirror blanks made from ZERODUR® TAILORED CRYO can be light weighted to almost 90% with our modern
processing technologies. With ZERODUR® TAILORED CRYO, SCHOTT offers the mirror blank material for the next
generation of space telescope applications.
Paper Details
Date Published: 18 July 2014
PDF: 10 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91512P (18 July 2014); doi: 10.1117/12.2055086
Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)
PDF: 10 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91512P (18 July 2014); doi: 10.1117/12.2055086
Show Author Affiliations
R. Jedamzik, SCHOTT AG (Germany)
T. Westerhoff, SCHOTT AG (Germany)
Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)
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