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
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Fig. 4. Pointing deviation measurement based on the Hartmann sensor
Fig. 5. Effect of dark background on pointing deviation measurement accuracy
Fig. 6. Effect of readout noises on pointing deviation measurement accuracy under conditions of different light intensity peaks. (a) Simulation analysis using a single subaperture; (b) Simulation analysis using sub-aperture related multiplexing technology
Fig. 7. Effect of signal-to-noise ratio on pointing deviation measurement accuracy
Fig. 8. Effect of photon noise on pointing deviation measurement accuracy under different readout noise conditions. (a) Simulation analysis using a single subaperture; (b) Simulation analysis using sub-aperture related multiplexing technology
Fig. 9. Effect of signal-to-noise ratio on pointing deviation measurement accuracy
Fig. 10. Effect of signal-to-noise ratio on pointing deviation measurement accuracy
Table 1. Hartmann sensor design parameters
View tableView in ArticleTable 1. Hartmann sensor design parameters
仪器名称 指标名称 参数 激光器 激光器波长(λ) 1064 nm 微透镜阵列 空间分辨率(N×N) 8×8 材料 石英 子透镜大小(d) 0.6 mm 子透镜形状 方形，连续表面 微透镜焦距(f) 80 mm 探测器 像素大小(p) 4.5 μm 分辨率 1936×1464 暗背景(ADU) 约240 ADU 信噪比(SNR) 43.6 dB 位深(bit) 12位
Table 2. Analysis of the influence of signal-to-noise ratio on pointing deviation measurement accuracy
View tableView in ArticleTable 2. Analysis of the influence of signal-to-noise ratio on pointing deviation measurement accuracy
光强大小(ADU) 3600 3200 3000 2600 2000 噪声标准差(ADU) 5.15 4.58 4.28 3.71 2.85 信噪比SNR 699.815 699.029 700.934 700.808 701.754 指向偏差测量精度(nrad) 135.459 135.394 135.448 135.563 135.698 与第一组数据的误差(nard) / 0.023804 0.02972 0.14467 0.28003 相对误差 / 0.000176 0.000219 0.001068 0.002067
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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
Paper Information
Category: Article
Received: Sep. 20, 2023
Accepted: Nov. 30, 2023
Published Online: Apr. 26, 2024
The Author Email: Gu Naiting (顾乃庭)
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