4 February 2003 SUBARU top unit exchanger
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Abstract
The SUBARU Telescope has four focal positions to allow different types of instruments. At present, there are four different Top Units; three types of secondary mirrors and one primary focus unit. These units have the weight of about 3 tons, and they need to be installed or changed high above in the air, with the telescope in its rest position, namely, pointed to the zenith. In order to carry out this exchange work safely and securely, in already a difficult working condition of high altitude place like Mauna Kea, we developed an automatic exchanger with remote control, called Top Unit Exchanger (TUE).
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Tomio Kurakami, Masami Yutani, Tomio Kanzawa, Norio Ohshima, Fumihiro Uraguchi, Kazuhito Namikawa, Akihiko Miyashita, Shinichi Kubota, "SUBARU top unit exchanger", Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); doi: 10.1117/12.456792; https://doi.org/10.1117/12.456792
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