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Proceedings Paper

The optical manufacturing of the refocusing mechanism of NIRSpec
Author(s): A. Novi; M. Taccola; J. Koehler; M. Di Giampietro
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Paper Abstract

This paper reports some details about the optical technologies used for manufacturing the mirrors of the Refocusing Mechanism Assembly (RMA). The RMA is a novel cryogenic mechanism designed by Galileo Avionica for the Near Infrared Spectrograph (NIRSpec), one of the instruments of the James Webb Space Telescope (JWST). The RMA contains two flat mirrors in Zerodur coated with Protected Silver. Severe constraints for accommodation in the Nirspec imposed very lightweighted substrates to the RMA mirrors and required state of art technologies in order to achieve the specified quality and its maintenance at cryogenic temperatures.

Paper Details

Date Published: 23 July 2008
PDF: 9 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701820 (23 July 2008); doi: 10.1117/12.787851
Show Author Affiliations
A. Novi, Galileo Avionica S.p.A. (Italy)
M. Taccola, Galileo Avionica S.p.A. (Italy)
J. Koehler, EADS Astrium GmbH (Germany)
M. Di Giampietro, Galileo Avionica S.p.A. (Italy)

Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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