1 February 1994 Design and fabrication of a 40-cm-diameter SiC-coated normal incidence telescope and spectrometer
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Abstract
The optics of a Dall-Kirkham telescope and a Rowland grating have been coated with ion- beam-sputtered SiC in the 2-m mirror coating facility at Goddard Space Flight Center with a newly acquired deposition system. During the deposition system test runs we verified two optical properties of thin SiC films that had been suggested from calculations: (1) the visible reflectivity is sensitive to the thickness of the SiC layer and (2) a substrate of Al (as opposed to glass) improves the visible reflectivity of the coatings. In addition, we found the slow decay in the far-UV reflectivity exhibited by ion-beam-sputtered SiC coatings stored in a desiccator could be significantly retarded by storage in vacuum. We present the far-UV effective area of the telescope and spectrometer that we plan to fly on NASA sounding rocket 36.109UG in September 1993.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephan Robert McCandliss, Mel E. Martinez, Paul D. Feldman, Russell Pelton, Ritva A. M. Keski-Kuha, Jeffrey S. Gum, "Design and fabrication of a 40-cm-diameter SiC-coated normal incidence telescope and spectrometer", Proc. SPIE 2011, Multilayer and Grazing Incidence X-Ray/EUV Optics II, (1 February 1994); doi: 10.1117/12.167206; https://doi.org/10.1117/12.167206
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