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13 September 1994 Ultraviolet coronagraph spectrometer (UVCS) for the solar and heliospheric (SOHO) mission
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The optical performances of the Ultraviolet Coronagraph Spectrometer (UVCS) of the Solar and Heliospheric Observatory (SOHO) mission have been tested. A laboratory evaluation unit (LEU) of the spectrometer assembly (SPA) consisting of the structure equipped with breadboard models of the entrance slit assembly (ESA), a grating drive mechanism (GDM) mounting a toroidal grating for the Ly(alpha) channel and a multi-anode microchannel array (MAMA) detector has been integrated and aligned. Both tests with visible and UV radiation have been performed. Aberration and stray light measurements have shown satisfactory performances of the instrument almost in compliance with the scientific requirements. A LEU and a flight unit of the White Light Channel (WLC) have been integrated and aligned in a proper light-tight housing and in the flight spectrometer assembly respectively. Measurements of the polarimeter modulation curve and the relative error have shown performances within the specificated requirements.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Silvano Fineschi, Giampiero Naletto, Piergiorgio Nicolosi, Giancarlo C. Noci, Claudio Pernechele, Marco Romoli, D. Spadaro, and Giuseppe Tondello "Ultraviolet coronagraph spectrometer (UVCS) for the solar and heliospheric (SOHO) mission", Proc. SPIE 2209, Space Optics 1994: Earth Observation and Astronomy, (13 September 1994);


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