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Proceedings Paper

Research progress of co-phasing inductance edge sensor for Chinese extremely large telescope
Author(s): Yong Zhang; Qimeng Wang; Yeping Li; Guohua Zhou; Jijun Ni; Aihua Li; Hongmei Li; Yizhong Zeng
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Paper Abstract

Edge sensor is one of the most important technologies for the extremely large segmented primary telescopes like Keck, Thirty Meter Telescope (TMT), European Extremely Large Telescope (E-ELT) and Chinese Future Giant Telescope (CFGT) for control of out-of-plane degrees of freedom. Different from the capacity edge sensor from Keck and TMT, one kind of an inductance edge sensor is proposed and applied with the similar principle and configuration, fine aligned and tested in this paper to try to realize the same co-focusing or co-phasing maintenance purpose and high accuracy of relative piston and tip/tilt degrees of freedom of the segments. The sensor is also considered and modified to much more sensitive to dihedral angle between the neighboring segments. Finally some preliminary conclusions are reached.

Paper Details

Date Published: 22 July 2014
PDF: 9 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91454Y (22 July 2014); doi: 10.1117/12.2056332
Show Author Affiliations
Yong Zhang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Qimeng Wang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Univ. of Chinese Academy of Sciences (China)
Yeping Li, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Guohua Zhou, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Jijun Ni, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Aihua Li, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Univ. of Chinese Academy of Sciences (China)
Hongmei Li, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
Yizhong Zeng


Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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