Development status of the segmented mirror control system in Seimei Telescope

Ichiro Jikuya; Daichi Uchida; Masaru Kino; Mikio Kurita; Katsuhiko Yamada

doi:10.1117/12.2562019

13 December 2020 Development status of the segmented mirror control system in Seimei Telescope

Ichiro Jikuya, Daichi Uchida, Masaru Kino, Mikio Kurita, Katsuhiko Yamada

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 1145152 (2020) https://doi.org/10.1117/12.2562019
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

This paper briefly explains the development status of the present segmented mirror control system in Seimei telescope. Modeling and control issues in segmented mirror control are then described to share our experience. The total degrees of freedoms (DOFs) in the ring and the segments are 57. 57 DOFs are separated into 54 non-fixed modes and 3 fixed modes. 3 fixed modes are selected by introducing the concepts of the virtual ideal mirror surface. 54 non-fixed modes are the target of the segmented mirror control system. The centralized control system (CCS) in the outer-segments-fixed method has been developed and has been successfully installed in Seimei telescope, and now scientific results are beginning to be reported.

Citation Download Citation

Ichiro Jikuya, Daichi Uchida, Masaru Kino, Mikio Kurita, and Katsuhiko Yamada "Development status of the segmented mirror control system in Seimei Telescope", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 1145152 (13 December 2020); https://doi.org/10.1117/12.2562019

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