15 June 2018 The MTG-SSA multi-purpose and multi-wavelength infrared test bench
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Abstract
The Spectral Separation Assembly (SSA) is a key component of the Flexible Combined Imager (FCI), an instrument that will be onboard Meteosat Third Generation (MTG). It splits the input beam coming from the telescope into five spectral groups, for a total of 16 channels, from 0.4 to 13.3 μm. It comprises a set of four dichroics separators followed by four collimating optics for the infrared spectral groups, which feed the cold imaging optics. To assess the optical performances, a specific multi-wavelength infrared test bench has been designed. The wavefront error can be measured for each channel of each spectral group. Other parameters can also be measured, namely pupil centering, line of sight, pupil diameter and pupil aberrations. This paper will present this test bench and the solutions developed to enable these measurements on a very large spectral range.
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Francois Riguet, Frédéric Barré, Romain Berruée, Christophe Cloutrier, Laurent-Daniel Haret, Thierry Haumont, Vincent Hugues, Manon Koszo, Denis Monaci, Fabien Moreau, Bertrand Plainchamp, Jacques Rodolfo, "The MTG-SSA multi-purpose and multi-wavelength infrared test bench", Proc. SPIE 10692, Optical Fabrication, Testing, and Metrology VI, 106920D (15 June 2018); doi: 10.1117/12.2316357; https://doi.org/10.1117/12.2316357
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