Design and Implementation of Spaceborne Multispectral Camera Imaging System

Song Ye; Xinyu Yu; Ge Gan; Yang Li; Zhengyu Zou; Meina Lu; Donggen Luo; Zhenwei Qiu

doi:10.3788/AOS230476

Acta Optica Sinica, Volume. 43, Issue 24, 2411001(2023)

Design and Implementation of Spaceborne Multispectral Camera Imaging System

Song Ye¹, Xinyu Yu^1,2,3, Ge Gan^2,3、**, Yang Li^2,3, Zhengyu Zou^2,3, Meina Lu^2,3, Donggen Luo^2,3、*, and Zhenwei Qiu^2,3、***

Author Affiliations

¹School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, Guangxi , China

²Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, Anhui , China

³Key Laboratory of Optical Calibration and Characterization, Chinese Academy of Sciences, Hefei 230031, Anhui , China

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Figures & Tables(15)

Fig. 1. Block diagram of imaging system

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Fig. 2. Imaging position diagram of long and short exposure time

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Fig. 3. Control signal and encoder sequence diagram of HR400

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Fig. 4. Diagrams of the imaging exposure process. (a) n<k; (b) n≥k

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Fig. 5. Drive timing simulation results under different exposure time. (a) n=2; (b) n=537

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Fig. 6. Imaging position diagram of long and short exposure time with delay compensation

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Fig. 7. Dynamic delay time sequence simulation results under different exposure time. (a) n=1 ms; (b) n=20 ms

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Fig. 8. Block diagram of image acquisition and storage module

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Fig. 9. Block diagram of performance test

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Fig. 10. Performance test site

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Fig. 11. Multispectral imaging results under different wavelengths. (a) λ=950 nm; (b) λ=910 nm; (c) λ=870 nm; (d) λ=765 nm;(e) λ=670 nm; (f) λ=490 nm

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Fig. 12. Absolute polarization azimuth test site

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Table 1. Error of major parameters
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Table 1. Error of major parameters
Parameter Parameter value Error value
$P_{e n t r y}$ — $δ P_{e n t r y}$ =±0.087°
$ω$ 73.245 （°）/s $δ ω$ =±0.03 （°）/s
$T_{c e n t e r}$ 60 ms $δ T_{c e n t e r}$ =±0.0012 ms

Table 2. Camera SNR under different exposure time
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Table 2. Camera SNR under different exposure time
T /ms 5 10 15 20 25 30 35 40 45 50 55 60
SNR 150.4 233.7 278.9 312.4 351.1 393.0 409.9 449.8 469.3 492.2 540.4 588.1

Table 3. Results of absolute polarization azimuth for three polarization channels at 670 nm
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Table 3. Results of absolute polarization azimuth for three polarization channels at 670 nm
T /ms
Add delay
compensation $α$ /（°）
No delay
compensation $α$ /（°）
P1 P2 P3 P1 P2 P3
3 4.745 64.517 124.439 1.079 60.834 120.756
15 4.856 64.499 124.447 1.611 61.250 121.185
60 4.959 64.505 124.501 3.331 62.901 122.903

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Song Ye, Xinyu Yu, Ge Gan, Yang Li, Zhengyu Zou, Meina Lu, Donggen Luo, Zhenwei Qiu. Design and Implementation of Spaceborne Multispectral Camera Imaging System[J]. Acta Optica Sinica, 2023, 43(24): 2411001

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