The Infrared Camera (IRC) for AKARI - Design and imaging performance

Takashi Onaka, Hideo Matsuhara, Takehiko Wada, Naofumi Fujishiro, Hideaki Fujiwara, Miho Ishigaki, Daisuke Ishihara, Yoshifusa Ita, Hirokazu Kataza, Woojung Kim, Toshio Matsumoto, Hiroshi Murakami, Youichi Ohyama, Shinki Oyabu, Itsuki Sakon, Toshihiko Tanabé, Toshinobu Takagi, Kazunori Uemizu, Munetaka Ueno, Fumio UsuiHidenori Watarai, Martin Cohen, Keigo Enya, Takafumi Ootsubo, Chris P. Pearson, Norihide Takeyama, Tomoyasu Yamamuro, Yuji Ikeda

Research output: Contribution to journalArticlepeer-review

337 Citations (Scopus)


The Infrared Camera (IRC) is one of two focal-plane instruments on the AKARI satellite. It is designed for wide-field deep imaging and low-resolution spectroscopy in the near- to mid-infrared (1.8-26.5 μm) in the pointed observation mode of AKARI. The IRC is also operated in the survey mode to make an All-Sky Survey at 9 and 18 μm. It comprises three channels. The NIR channel (1.8-5.5 μm) employs a 512 × 412 InSb array, whereas both the MIR-S (4.6-13.4 μm) and MIR-L (12.6-26.5 μm) channels use 256 × 256 Si:As impurity band conduction arrays. Each of the three channels has a field-of-view of about 10′ × 10′, and they are operated simultaneously. The NIR and MIR-S share the same field-of-view by virtue of a beam splitter. The MIR-L observes the sky about 25′ away from the NIR/MIR-S field-of-view. The IRC gives us deep insights into the formation and evolution of galaxies, the evolution of planetary disks, the process of star-formation, the properties of interstellar matter under various physical conditions, and the nature and evolution of solar system objects. The in-flight performance of the IRC has been confirmed to be in agreement with the pre-flight expectation. This paper summarizes the design and the in-flight operation and imaging performance of the IRC.

Original languageEnglish
Pages (from-to)S401-S410
JournalPublication of the Astronomical Society of Japan
Issue numberSPEC. ISS. 2
Publication statusPublished - 2007


  • Infrared: general
  • Instrumentation: detectors
  • Space vehicles: instruments


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