The optical manufacturing of the refocusing mechanism of NIRSpec

A. Novi; M. Taccola; J. Koehler; M. Di Giampietro

doi:10.1117/12.787851

23 July 2008 The optical manufacturing of the refocusing mechanism of NIRSpec

A. Novi, M. Taccola, J. Koehler, M. Di Giampietro

Proceedings Volume 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation; 701820 (2008) https://doi.org/10.1117/12.787851
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

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); https://doi.org/10.1117/12.787851

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