The Edge Sensor of Segmented Mirror Based on Fringes of Equal Thickness  

作　　者：Xi Zhang Heng Zuo Yong Zhang Ye-Ping Li 

机构地区：[1]Nanjing Institute of Astronomical Optics and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Nanjing 210042,China [2]Key Laboratory of Astronomical Optics and Technology,Nanjing Institute of Astronomical Optics and Technology,Chinese Academy of Sciences,Nanjing 210042,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [5]Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Research in Astronomy and Astrophysics》2023年第6期238-251,共14页天文和天体物理学研究（英文版）

基　　金：Guo Shou Jing Telescope(the Large Sky Area Multi-Object Fiber Spectroscopic Telescope)is a National Major Scientific Project built by the Chinese Academy of Sciences.Funding for the project has been provided by the National Development and Reform Commission;supported by the National Key R&D Program of China(Grant Nos.2022YFA1603002,2022YFA1603001,2021YFC2801402 and SQ2021YFC2800011);the National Natural Science Foundation of China(Grant Nos.U2031207,U1931207,12073053,and 1331204)。

摘　　要：Co-phase and co-focus detection is one of the key technologies for large-aperture segmented mirror telescopes.In this paper,a new edge sensor based on fringes of equal thickness is developed,which can detect each segment's relative piston,tilt,and tip errors from the interferograms.Based on the co-focus demand for many ground-based seeing limited segmented mirror telescopes,an edge sensor prototype based on such a principle is built and applied in the indoor segmented mirror experiment system in the lab.According to the co-focus requirement of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope,many simulations and experiments are carried out for cofocus error detection of the segmented mirror system.Experiment results show that the co-focus accuracy is better than 002 rms,which can meet the co-focus requirements of most large or extremely large segmented mirror astronomical telescopes.

关 键 词：instrumentation:interferometers astronomical instrumentation methods and techniques techniques:interferometric 

分 类 号：P111[天文地球—天文学]