RT Book, Section T1 The optical design of a far infrared imaging FTS for SPICA A1 Pastor Sempere, Carmen A1 Zuluaga, Pablo A1 Jellerma, Willem A1 González Fernández, Luis M. A1 Belenguer Dávila, Tomás A1 Torres Redondo, Josefina A1 Kooijman, Peter Paul A1 Najarro, Francisco A1 Eggens, Martin A1 Roelfsema, Peter A1 Nakagawa, Takao AB This 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. PB The Society of Photo-Optical Instrumentation Engineers (SPIE) SN 978-081949611-9 YR 2014 FD 2014-08 LK https://hdl.handle.net/20.500.14352/35888 UL https://hdl.handle.net/20.500.14352/35888 LA eng NO ISSN: 0277786XSpace Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave; Montreal; Canada; 22 June 2014 through 27 June 2014; Code 111831 NO Ministerio de Economía y Competitividad de España (MINECO) DS Docta Complutense RD 5 abr 2025