Opto-Electronic Engineering, Volume. 51, Issue 2, 230234(2024)

High-precision ground measurement technology research for measuring pointing deviation in space-based gravitational wave detection telescopes

Qilin Song1,2,3,4, Yang Li1,3,4, Ziye Zhou1,3,4, Yawei Xiao1,2,3,4, Jinsheng Yang1,3,4, Linhai Huang1,2,3,4, Naiting Gu1,2,3,4、*, and Changhui Rao1,2,3,4
Author Affiliations
  • 1National Laboratory on Adaptive Optics, Chengdu, Sichuan 610209, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan 610209, China
  • 4Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, Sichuan 610209, China
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    The spaceborne telescope plays a critical role in detecting gravitational waves in space. Given transmission distances of approximately 109 meters between different constellations, there are stringent requirements for nanoradian precision in telescope pointing accuracy. Accurate pointing deviation measurement and calibration are essential prerequisites for achieving high-precision pointing in space-based gravitational wave detection telescopes. To meet the ground testing and sensor calibration needs for space telescopes' pointing deviation, this paper introduces a novel high-precision measurement method based on the Hartmann principle. By utilizing the concept of multi-aperture spatial reuse, this approach mitigates the impact of various sources of random errors, significantly improving the precision of pointing deviation measurements. The paper conducts an analysis and optimization of Hartmann sensor parameters, establishing a quantitative relationship between sensor parameters and pointing deviation measurement accuracy. The research findings demonstrate that the multi-aperture spatial reuse method based on the Hartmann principle can achieve highly precise measurements of telescope pointing deviations, with the accuracy as low as 0.32 nrad. This method offers a feasible approach and serves as a reference for ground testing and in-orbit sensor calibration of space-based gravitational wave detection telescopes.

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    Qilin Song, Yang Li, Ziye Zhou, Yawei Xiao, Jinsheng Yang, Linhai Huang, Naiting Gu, Changhui Rao. High-precision ground measurement technology research for measuring pointing deviation in space-based gravitational wave detection telescopes[J]. Opto-Electronic Engineering, 2024, 51(2): 230234

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    Paper Information

    Category: Research Articles

    Received: Sep. 20, 2023

    Accepted: Nov. 30, 2023

    Published Online: Apr. 26, 2024

    The Author Email: Gu Naiting (顾乃庭)

    DOI:10.12086/oee.2024.230234

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