Pastor Sempere, CarmenJellema, WillemZuluaga Ramírez, PabloArrazola, DavidFernández Rodríguez, M.Belenguer Dávila, TomásGonzález Fernández, Luis M.Audley, Michael D.Evers, JaapEggens, MartinTorres Redondo, JosefinaNajarro, FranciscoRoelfsema, Peter2023-06-182023-06-182016[1] Willem Jellema ; Dennis van Loon ; David Naylor and Peter Roelfsema. " A large-stroke cryogenic imaging FTS system for SPICA-Safari ",Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91434A (August 28, 2014); doi:10.1117/12.2056778; [2] Carmen Pastor ; Pablo Zuluaga ; Willem Jellema ; Luis Miguel González Fernández ; Tomas Belenguer, et al. " The optical design of a far infrared imaging FTS for SPICA ", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91434B (August 2, 2014); doi:10.1117/12.2056791; [3] Peter R. Roelfsema Martin Giard, Francisco Najarro de la Parra, Kees Wafelbakker, Willem Jellema, Bruce Sibthorpe, Brian D. Jackson,“Achieving extreme sensitivity in the FAR-IR: the SAFARI grating spectrometer for SPICA “Proc. of SPIE Astronomical Telescopes & Instrumentation 2016 [4] M.G. Moharam, et.al., “Rigorous coupled-wave analysis of metallic surface-relief gratings,” JOSA a 3(86)1780.978-151060187-110.1117/12.2232786https://hdl.handle.net/20.500.14352/24902Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave; Edinburgh; United Kingdom; 26 June 2016 through 1 July 2016 Copyright 2016. Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. ISSN: 0277-786XSpicA FAR infrared Instrument, SAFARI, is one of the instruments planned for the SPICA mission. The SPICA mission is the next great leap forward in space-based far-infrared astronomy and will study the evolution of galaxies, stars and planetary systems. SPICA will utilize a deeply cooled 2.5m-class telescope, provided by European industry, to realize zodiacal background limited performance, and high spatial resolution. The instrument SAFARI is a cryogenic grating-based point source spectrometer working in the wavelength domain 34 to 230 μm, providing spectral resolving power from 300 to at least 2000. The instrument shall provide low and high resolution spectroscopy in four spectral bands. Low Resolution mode is the native instrument mode, while the high Resolution mode is achieved by means of a Martin-Pupplet interferometer. The optical system is all-reflective and consists of three main modules; an input optics module, followed by the Band and Mode Distributing Optics and the grating Modules. The instrument utilizes Nyquist sampled filled linear arrays of very sensitive TES detectors. The work presented in this paper describes the optical design architecture and design concept compatible with the current instrument performance and volume design drivers.engAtribución-NoComercial-SinDerivadas 3.0 Españabook parthttp://dx.doi.org/10.1117/12.2232786open access52-43535543.42Far infraredGrating spectrometerOptical designSPICA missionAstrofísicaÓptica física, óptica cuántica2209.19 Óptica física