Liquid-helium-cooled Fabry-Perot spectrometer and the frequency switching method for far-infrared spectroscopic observations

Takao Nakagawa; Haruyuki Okuda; Hiroshi Shibai; Hideo Matsuhara; Yukiyasu Kobayashi; Norihisa Hiromoto

doi:10.1117/12.19079

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1 July 1990 Liquid-helium-cooled Fabry-Perot spectrometer and the frequency switching method for far-infrared spectroscopic observations

Takao Nakagawa, Haruyuki Okuda, Hiroshi Shibai, Hideo Matsuhara, Yukiyasu Kobayashi, Norihisa Hiromoto

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Proceedings Volume 1235, Instrumentation in Astronomy VII; (1990) https://doi.org/10.1117/12.19079
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

The Fabry-Perot spectrometer designed for NIR spectroscopic observations on the Balloon-borne Infrared Telescope (BIRT) is described in detail. Particular attention is given to the newly developed frequency switching method used in the BIRT, which is especially suitable for observations of spatially extended emission because the frequency switching mode does not require spacial chopping. Observations are described from two successful experiments conducted in 1988 using the Fabry-Perot spectrometer on the BIRT, in both the spatial chopping mode and the frequency switching mode.

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Takao Nakagawa, Haruyuki Okuda, Hiroshi Shibai, Hideo Matsuhara, Yukiyasu Kobayashi, and Norihisa Hiromoto "Liquid-helium-cooled Fabry-Perot spectrometer and the frequency switching method for far-infrared spectroscopic observations", Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); https://doi.org/10.1117/12.19079

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