24 July 2014 A thermal spectral-spatial interferometric testbed
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We present an ongoing effort to achieve a Double Fourier Modulating (DFM) interferometer in the thermal infrared wavelength range. We describe a testbed designed to combine a sky simulator in the form of a miniaturized complex calibration source at the focus of a parabolic collimator with an interferometer baseline consisting of two parallel telescopes each mounted on a motorized linear stage. The two input arms are combined after one of them is modulated via a fast-scanning piezoelectric roof-top mirror. The optical design and layout of the testbed, the choice of interferometer parameters as well as the calibration scene adopted as source are described.
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G. Savini, G. Savini, R. Juanola-Parramon, R. Juanola-Parramon, R. Stabbins, R. Stabbins, N. Baccichet, N. Baccichet, A. Donohoe, A. Donohoe, A. Murphy, A. Murphy, C. O'Sullivan, C. O'Sullivan, } "A thermal spectral-spatial interferometric testbed", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 91462N (24 July 2014); doi: 10.1117/12.2056612; https://doi.org/10.1117/12.2056612


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