Infrared and Laser Engineering, Volume. 53, Issue 3, 20230629(2024)
Design and optimization of a single-core axis in a ground-based photoelectric imaging system
Figures & Tables(17)
Fig. 9. Deformation cloud map of the primary mirror under thermal field
Fig. 10. Deformation cloud map of the primary mirror under gravitational field
Fig. 11. Overall comparison of surface shape errors before and after optimization under different temperature changes. (a) Δ
Fig. 12. The primary mirror is placed in a horizontal position along the optical axis
Fig. 13. Analysis of main mirror surface accuracy using interferometry. (a) Detection at 20 ℃; (b) Detection at 40 ℃
Table 1. Properties of the material mechanics
View tableView in ArticleTable 1. Properties of the material mechanics
Material Density/ kg·m−3 Elasticity/ GPa Poisson’s ratio Coefficient of expansion/°C−1 Schott Zerodur-M 2.7×103 91 0.24 0.01×10−6 4J32 8.1×103 130 0.25 0.017×10−6
Table 2. MIGA parameter setting
View tableView in ArticleTable 2. MIGA parameter setting
Parameter Value Sub-population size 10 Rate of mutation 0.01 Number of islands 10 Rate of migration 0.01 Number of generations 10 Interval of migration 10 Crossover probability 0.99
Table 3. Comparison before and after optimization
View tableView in ArticleTable 3. Comparison before and after optimization
Parameter Before optimization After optimization Optimization rate a 25 mm 27.20 mm - b 17 mm 18.93 mm - c 9 mm 11.23 mm - RMS 56.7 nm 17.9 nm 68.43% PV 140.1 nm 90.2 nm 35.62% RD 6.54 µm 4.22 µm 35.47%
Table 4. Each working state error of the primary mirror
View tableView in ArticleTable 4. Each working state error of the primary mirror
Load RMS/nm PV/nm RD/μm G光轴竖直，ΔT=20 ℃ 10.53 71.06 2.21 G光轴水平，ΔT=20 ℃ 17.84 90.33 4.23 G光轴竖直，ΔT=80 ℃ 20.46 90.17 2.32 G光轴水平，ΔT=80 ℃ 27.06 115.64 4.29
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Hanwang Zhu, Xiangyao Xue, Mingzhen Shao, Wenbao Zhang, Shang Li, Xiushuo Wang, Guangyi Wang, Xinyu Yang. Design and optimization of a single-core axis in a ground-based photoelectric imaging system[J]. Infrared and Laser Engineering, 2024, 53(3): 20230629
Paper Information
Category: Optical design
Received: Nov. 10, 2023
Accepted: --
Published Online: Jun. 21, 2024
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