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Proceedings Paper

Far-Infrared Interferometeric Telescope Experiment (FITE): sensor optics
Author(s): Tsunehito Kohyama; Hiroshi Shibai; Mitsunobu Kawada; Toyoki Watabe; Taro Matsuo; Atsushi Ohkubo; Eri Katoh; Tetsuo Kanoh; Miki Suzuki; Shun Mochizuki; Yuka Matsumoto; Hirono Morishita; Koudai Yamamoto; Ryoko Kanoh; Asami Nakashima; Mitsuhiro Tanabe; Yasuo Doi; Masanao Narita
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Paper Abstract

We have developed a sensor optical system for the Far Infrared Interferometric Telescope (FITE). The spatial resolution of FITE is expected to be 2.5 arcseconds. In order to derive the spatial extent of target objects, the visibility of interference fringes has to be measured precisely. For this purpose, we constructed the focal plane assembly of the FITE interferometer with the sensor optics. The focal plane is the entrance focus of the sensor optics. A far-infrared (FIR) array detector is installed on the final focal plane of the sensor optics. Its camera optics has F/106 beam for each beam of the interferometer. The PSF is dominated by diffraction, and its size corresponds approximately to the array size so that the fringe pattern can be measured by the array in real time. This system employs of two IR detectors and an optical CCD. The FIR detector has a format of 1.5mm ×15 pixels. In addition to the FIR array detector, we have a mid-IR detector and an optical CCD. They are also installed on the final focal plane of the sensor optics. These two detectors are used for the precise alignment of the interferometer optics.

Paper Details

Date Published: 28 July 2008
PDF: 10 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 70133O (28 July 2008); doi: 10.1117/12.788780
Show Author Affiliations
Tsunehito Kohyama, Nagoya Univ. (Japan)
Hiroshi Shibai, Osaka Univ. (Japan)
Mitsunobu Kawada, Nagoya Univ. (Japan)
Toyoki Watabe, Nagoya Univ. (Japan)
Taro Matsuo, Osaka Univ. (Japan)
Atsushi Ohkubo, Nagoya Univ. (Japan)
Eri Katoh, Osaka Univ. (Japan)
Tetsuo Kanoh, Osaka Univ. (Japan)
Miki Suzuki, Nagoya Univ. (Japan)
Shun Mochizuki, Nagoya Univ. (Japan)
Yuka Matsumoto, Nagoya Univ. (Japan)
Hirono Morishita, Nagoya Univ. (Japan)
Koudai Yamamoto, Nagoya Univ. (Japan)
Ryoko Kanoh, Nagoya Univ. (Japan)
Asami Nakashima, Nagoya Univ. (Japan)
Mitsuhiro Tanabe, Nagoya Univ. (Japan)
Yasuo Doi, The Univ. of Tokyo (Japan)
Masanao Narita, Institute of Space and Astronautical Science, JAXA (Japan)

Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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