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23 July 2008 The optical manufacturing of the refocusing mechanism of NIRSpec
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Novi, M. Taccola, J. Koehler, and M. Di Giampietro "The optical manufacturing of the refocusing mechanism of NIRSpec", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701820 (23 July 2008);


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