Physics – Optics
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2210..395h&link_type=abstract
Proc. SPIE Vol. 2210, p. 395-406, Space Optics 1994: Space Instrumentation and Spacecraft Optics, Thierry M. Dewandre; Joachim J
Physics
Optics
Scientific paper
A new material designated C/SiC is the basis for a current ultra-lightweight scan mirror (ULSM) ESA/ESTEC technology development contract for the METEOSAT Second Generation (MSG) Program (Ref. {1}). It consists of random- oriented carbon fibers as 'greenbody' which is shaped to the designed configuration, and is infiltrated in the liquid phase with Si resulting in a SiC enriched surface layer, with a CVD grown SiC optical polishing layer. The reflective coating finally is silver under a dedicated protection layer. The requirements for this mirror are rather stringent: during 7 years in a geostationary orbit of life it will permantly be exposed to centrifugal forces induced by the satellite spinning at 100 rpm. Due to high image quality requirements for the imager - designated SEVIRI (Spinning Enhanced Visible IR Imager) - the MTF degradation caused by the scan mirror alone are defined to
Deyerler Michael
Harnisch Bernd
Kunkel Bernd P.
Papenburg Ulrich
Pradier Alain
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