The research progress of eddy current edge sensors for Chinese Extremely Large Telescope

Jijun Ni; Wei Li; Jing Yin; Chengliang Pan; Yong Zhang

doi:10.1117/12.2312584

6 July 2018 The research progress of eddy current edge sensors for Chinese Extremely Large Telescope

Jijun Ni, Wei Li, Jing Yin, Chengliang Pan, Yong Zhang

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 1070063 (2018) https://doi.org/10.1117/12.2312584
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The segmented mirror active optics technology is one of the key technologies for the extremely large telescope, while edge sensor is one of the essential core components of active optics for the co-phasing maintenance of all segmented mirrors. The main properties of these edge sensors are of high precision of nanometers, high linearity, and low sensitivity to temperature and humidity fluctuations as well as high reliability. This paper presents an eddy current edge sensor design developed cooperatively by Nanjing Institute of Astronomical Optics and Technology and University of Science and Technology of China. The stage work performance results of eddy current sensor prototype under representative operational conditions are also presented.

Citation Download Citation

Jijun Ni, Wei Li, Jing Yin, Chengliang Pan, and Yong Zhang "The research progress of eddy current edge sensors for Chinese Extremely Large Telescope", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070063 (6 July 2018); https://doi.org/10.1117/12.2312584

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