Support systems for segmented mirrors – an overview

Hans J. Kaercher

doi:10.1117/12.674047

30 May 2006 Support systems for segmented mirrors - an overview

Hans J. Kaercher

Proceedings Volume 6148, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 614809 (2006) https://doi.org/10.1117/12.674047
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

Extreme large telescopes, optical as well as radio telescopes have segmented mirrors and an active surface. The position control of the mirror segments may be based on a closed loop concept as used for optical telescopes, with a wave-front sensor for the identification of the mirror deviations; or an open loop concept as used for radio telescopes, with deformation sensors for the identification of deformations on the supporting structure. The paper compares the structural and mechanical components for the segment position control, the related control loop architecture, the placement of the position and deformation sensors, and the algorithms needed for designing the controllers.

Citation Download Citation

Hans J. Kaercher "Support systems for segmented mirrors - an overview", Proc. SPIE 6148, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 614809 (30 May 2006); https://doi.org/10.1117/12.674047

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