29 July 2016 SAFARI optical system architecture and design concept
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Abstract
SpicA 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.
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Carmen Pastor, Carmen Pastor, Willem Jellema, Willem Jellema, Pablo Zuluaga-Ramírez, Pablo Zuluaga-Ramírez, David Arrazola, David Arrazola, M. Fernández-Rodriguez, M. Fernández-Rodriguez, Tomás Belenguer, Tomás Belenguer, Luis M. González Fernández, Luis M. González Fernández, Michael D. Audley, Michael D. Audley, Jaap Evers, Jaap Evers, Martin Eggens, Martin Eggens, Josefina Torres Redondo, Josefina Torres Redondo, Francisco Najarro, Francisco Najarro, Peter Roelfsema, Peter Roelfsema, } "SAFARI optical system architecture and design concept", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99043U (29 July 2016); doi: 10.1117/12.2232786; https://doi.org/10.1117/12.2232786
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