28 July 2000 Infrared camera (IRC) on board ASTRO-F (IRIS): design overview and current status
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Abstract
The design overview and current development status of the Infrared Camera (IRC) onboard the Japanese infrared space mission, ASTRO-F (commonly called as the Infrared Imaging Surveyor, IRIS), are presented. The IRC is one of the focal plane instruments of ASTRO-F and will make imaging and low- resolution spectroscopy observations in the wide spectral range of the near- to mid-infrared of 2 - 26 micrometers . ASTRO-F will be brought into an IRAS-type sun-synchronous polar orbit. The IRC will be operated in the pointing mode, in which the telescope will be pointed at a fixed target position on the sky for about 10 minutes. The pointed observation may be scheduled up to three times per orbit. The IRC has three channels: NIR (2 - 5 micrometers ), MIR-S (5 - 12 micrometers ) and MIR-L (12 - 26 micrometers ). All of the three channels use refractive optics. Each channel has a field-of-view of 10' X 10' with nearly diffraction-limited spatial resolution. The NIR and MIR-S channels simultaneously observe the same field on the sky, while the MIR-L observes the sky about 20' away from the NIR/MIR-S position. State- of-the-art large format array detectors manufactured by Raytheon/IRCoE are employed for the IRC. The NIR channel uses a 512 X 412 InSb array, and 256 X 256 Si:As IBC arrays are used for the MIR channels. Fabrication of the proto-model has been completed and the preliminary performance test is under way.
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Hidenori Watarai, Saneyuki Fujita, Daisuke Ishihara, Woojung Kim, Ippei Maeda, Hideo Matsuhara, Toshio Matsumoto, Hiroshi Murakami, Taketoshi Negishi, Takashi Onaka, Takafumi Ootsubo, Norihide Takeyama, Kazunori Uemizu, Munetaka Ueno, Takehiko Wada, "Infrared camera (IRC) on board ASTRO-F (IRIS): design overview and current status", Proc. SPIE 4013, UV, Optical, and IR Space Telescopes and Instruments, (28 July 2000); doi: 10.1117/12.393993; https://doi.org/10.1117/12.393993
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