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, Stephan Robert McCandliss, Mel E. Martinez, Mel E. Martinez, Paul D. Feldman, Paul D. Feldman, Russell Pelton, Russell Pelton, Ritva A. M. Keski-Kuha, Ritva A. M. Keski-Kuha, Jeffrey S. Gum, 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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