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Proceedings Paper

CIAX: Cassegrain instrument auto exchanger for the Subaru telescope
Author(s): Tomonori Usuda; Koji Omata; Masami Yutani; Yasuo Torii; Yoshitaka Mikami; Tetsuo Nishino; Takeshi Noguchi; Tetsuo Nishimura; Shigeru Sawada
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Paper Abstract

The Cassegrain Instrument Automatic eXchanger (CIAX) system for the 8.2 meter Subaru Telescope moves instruments between the Cassegrain mounting flange and stand-by flanges without manual intervention. Observation efficiency improves not only because of quick exchanges, scheduled or emergency, but also because of increased flexibility in selecting an optimum instrument for weather conditions or observation goals. Reliable and safer instrument exchanges are achieved by the precision mechanical positioning system (less than 0.5 mm) and an automatic connector system for electrical cables, optical fibers and fluid lines. Instrument down time due to connector/cable failure by human error is eliminated. Interfaces to the telescope flange are standardized for all five Cassegrain instruments (approximately 2000 kgf each) currently in use or under preparation.

Paper Details

Date Published: 16 June 2000
PDF: 10 pages
Proc. SPIE 4009, Advanced Telescope and Instrumentation Control Software, (16 June 2000); doi: 10.1117/12.388384
Show Author Affiliations
Tomonori Usuda, National Astronomical Observatory of Japan (United States)
Koji Omata, National Astronomical Observatory of Japan (United States)
Masami Yutani, National Astronomical Observatory of Japan (Japan)
Yasuo Torii, National Astronomical Observatory of Japan (Japan)
Yoshitaka Mikami, National Astronomical Observatory of Japan (Japan)
Tetsuo Nishino, National Astronomical Observatory of Japan (Japan)
Takeshi Noguchi, National Astronomical Observatory of Japan (Japan)
Tetsuo Nishimura, National Astronomical Observatory of Japan (United States)
Shigeru Sawada, Techno House Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 4009:
Advanced Telescope and Instrumentation Control Software
Hilton Lewis, Editor(s)

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