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    Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept


    Bracken, Colm and O'Sullivan, Créidhe and Murphy, J.Anthony and Donohoe, A. and Savini, G. and Lightfoot, John and Juanola-Parramon, Roser (2016) Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept. Infrared Physics & Technology, 77. pp. 171-178. ISSN 1350-4495

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    Abstract

    FISICA (Far-Infrared Space Interferometer Critical Assessment) was a three year study of a far-infrared spatio-spectral double-Fourier interferometer concept. One of the aims of the FISICA study was to set-out a baseline optical design for such a system, and to use a model of the system to simulate realistic telescope beams for use with an end-to-end instrument simulator. This paper describes a two-telescope (and hub) baseline optical design that fulfils the requirements of the FISICA science case, while minimising the optical mass of the system. A number of different modelling techniques were required for the analysis: fast approximate simulation tools such as ray tracing and Gaussian beam methods were employed for initial analysis, with GRASP physical optics used for higher accuracy in the final analysis. Results are shown for the predicted far-field patterns of the telescope primary mirrors under illumination by smooth walled rectangular feed horns. Far-field patterns for both on-axis and off-axis detectors are presented and discussed.

    Item Type: Article
    Additional Information: Cite as: C. Bracken, C. O’Sullivan, J.A. Murphy, A. Donohoe, G. Savini, J. Lightfoot, R. Juanola-Parramon, Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept, Infrared Physics & Technology, Volume 77, 2016, Pages 171-178, ISSN 1350-4495, https://doi.org/10.1016/j.infrared.2016.05.030.
    Keywords: Far-infrared; FISICA Interferometry; Double-Fourier; PyFIInS (Python Far-Infrared Instrument Simulator); Optics; Quasi-optics; Physical optics;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 14084
    Identification Number: https://doi.org/10.1016/j.infrared.2016.05.030
    Depositing User: Dr. Anthony Murphy
    Date Deposited: 25 Feb 2021 16:57
    Journal or Publication Title: Infrared Physics & Technology
    Publisher: Elsevier
    Refereed: Yes
    URI:

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