Pastor Sempere, CarmenZuluaga, PabloJellerma, WillemGonzález Fernández, Luis M.Belenguer Dávila, TomásTorres Redondo, JosefinaKooijman, Peter PaulNajarro, FranciscoEggens, MartinRoelfsema, PeterNakagawa, Takao2023-06-192023-06-192014-08978-081949611-910.1117/12.2056791https://hdl.handle.net/20.500.14352/35888ISSN: 0277786X Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave; Montreal; Canada; 22 June 2014 through 27 June 2014; Code 111831This paper describes the optical design of the far infrared imaging spectrometer for the JAXA's SPICA mission. The SAFARI instrument, is a cryogenic imaging Fourier transform spectrometer (iFTS), designed to perform backgroundlimited spectroscopic and photometric imaging in the band 34-210 μm. The all-reflective optical system is highly modular and consists of three main modules; input optics module, interferometer module (FTS) and camera bay optics. A special study has been dedicated to the spectroscopic performance of the instrument, in which the spectral response and interference of the instrument have been modeled, as the FTS mechanism scans over the total desired OPD range.engAtribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/book parthttp://dx.doi.org/10.1117/12.2056791open access535.243535.41520Diffraction analysisFar infraredIFTSInterferometryOptical designAstronomía (Física)Óptica (Física)Técnicas de la imagenLáseres2209.19 Óptica Física2209.10 Láseres