Spatial heterodyne spectrometer for FLEX
2007
A spatial heterodyne spectrometer (SHS) has significant advantages for high spectral resolution imaging over narrow
pre-selected bands compared to traditional solutions. Given comparable optical etendue at R~6500, a field-widened SHS
will have a throughput-resolution product ~170 x larger than an air-spaced etalon spectrometer, and ~1000 x larger than
a standard grating spectrometer. The monolithic glass Michelson design and lack of moving parts allows maximum
stability of spectral calibration over the mission life. For these reasons, SHS offers considerable advantages for the core
spectrometer instrument in the European Space Agency's (ESA) Fluorescence Explorer (FLEX) mission.
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