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21 November 2017 Design and manufacturing methods for the integral field unit of the nirspec instrument on JWST
Dan Lobb, David Robertson
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Proceedings Volume 10567, International Conference on Space Optics — ICSO 2006; 105671Q (2017) https://doi.org/10.1117/12.2308103
Event: International Conference on Space Optics 2006, 2006, Noordwijk, Netherlands
Abstract
An integral field unit, to be used with the near-IR spectrometer instrument of the James Webb Space Telescope (JWST), is currently under development by SSTL and CfAI. Special problems in design and manufacture of the optical system are outlined, and manufacturing methods for critical optical elements are discussed. The optical system is complex, requiring a total of 95 mirrors to produce 30 output channels. Emphasis is placed on the advantages of free-form machining in aluminium. These include: resistance to launch stress, insensitivity to temperature variations from ambient to cryogenic, and the possibility of relatively complex mirror surface shapes.
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Dan Lobb and David Robertson "Design and manufacturing methods for the integral field unit of the nirspec instrument on JWST", Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 105671Q (21 November 2017); https://doi.org/10.1117/12.2308103
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KEYWORDS
Mirrors
Relays
Spectroscopy
James Webb Space Telescope
Optical design
Diamond machining
Design for manufacturability
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