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Proceedings Paper

Tip-tilt and chopping mechanism for the Subaru Telescope IR secondary mirror unit
Author(s): Noboru Itoh; Yasushi Horiuti; Kouki Asari; Masahiko Hayashi
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Paper Abstract

The Subaru Telescope introduces a tip-tilt and chopping mechanism for an IR secondary mirror, which is of ULE light weight type, 1.3 m in diameter and 180 kg in weight. Performance targets of the tip-tilt and chopping mechanism are 30 Hz control band width with 0.01' resolution for tip- tilt and 30' amplitude with frequency of 5 Hz for chopping. To archive these targets, a system combining 6-point dynamic drive mechanism and 15-point passive support mechanism against for gravity are developed and compact actuators of electric magnet type for the drive mechanism are employed. Test with a dummy mirror shows that the performance target are achieved. This paper describes the design and test results of the tip-tilt and chopping mechanism.

Paper Details

Date Published: 25 August 1998
PDF: 8 pages
Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998);
Show Author Affiliations
Noboru Itoh, Mitsubishi Electric Corp. (Japan)
Yasushi Horiuti, Mitsubishi Electric Corp. (Japan)
Kouki Asari, Mitsubishi Electric Corp. (Japan)
Masahiko Hayashi, National Astronomical Observatory of Japan (United States)


Published in SPIE Proceedings Vol. 3352:
Advanced Technology Optical/IR Telescopes VI
Larry M. Stepp, Editor(s)

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