Infrared and Laser Engineering, Volume. 53, Issue 4, 20230663(2024)
Temperature adaptability of optical middle cabin of airborne high-energy laser system based on cage-type structure
Figures & Tables(16)
Fig. 4. Finite element model of optical middle cabin and components
Fig. 5. Temperature analysis results of each mirrors. (a) Upper 45° incident reflector; (b) Upper 45° exit reflector; (c) Lower 45° incident reflector; (d) Fine tracking spectroscope; (e) Fine tracking reflector 1; (f) FSM of fine tracking； (g) Lower 45° exit reflector; (h) Fine tracking reflector 2
Table 1. Technical indicators of optical middle cabin
View tableView in ArticleTable 1. Technical indicators of optical middle cabin
Technical indicators Requirement Overall dimension ≤Ø500×300 mm Operating temperature 15-25 ℃ System wave aberration ≤1/12λ@632.8 nm Coaxiality of each branch circuit ≤150 µrad
Table 2. Material allocation in optical middle cabin
View tableView in ArticleTable 2. Material allocation in optical middle cabin
Part Material Connection tube 2A12 Mounting plate 2A12 Mirror support 2A12 Mirror H-K9L Frock 2A12 Rubber RTV
Table 3. materials properties of optical middle cabin
View tableView in ArticleTable 3. materials properties of optical middle cabin
Material E/GPa ρ/g·cm−3 κ/W·(m·K)−1 α/×10−6·℃−1 H-K9L 79.2 2.52 1.1 7.6 2A12 68.2 2.68 121 23.6 RTV 0.005 2.2 1.34 236
Table 4. Each mirror deflection angle (Unit: μrad)
View tableView in ArticleTable 4. Each mirror deflection angle (Unit: μrad)
Mirror ${\theta _{xi}}$ ${\theta _{ {{y} }i} }$ Upper 45° incident reflector ${\theta _{x1}}/{\theta _{y1}}$ −14.061 −9.702 Upper 45° exit reflector ${\theta _{x2} }/{\theta _{ {{y} }2} }$ 13.839 10.606 Lower 45° incident reflector ${\theta _{x3} }/{\theta _{ {{y3} } } }$ 15.205 −11.302 Fine tracking spectroscope ${\theta _{x4} }/{\theta _{ {{y4} } } }$ 20.584 15.632 Fine tracking reflector 1 ${\theta _{x5} }/{\theta _{ {{y5} } } }$ 11.967 11.930 FSM of fine tracking ${\theta _{x6} }/{\theta _{ {{y6} } } }$ 7.470 18.252 Lower 45° exit reflector ${\theta _{x7} }/{\theta _{ {{y7} } } }$ 16.961 −12.679 Fine tracking reflector 2 ${\theta _{x8} }/{\theta _{ {{y8} } } }$ −23.640 28.496
Table 5.
\begin{document}$\lambda ,{P_x},{P_y}$\end{document} View tableView in ArticleTable 5.
\begin{document}$\lambda ,{P_x},{P_y}$\end{document} Mirror $\lambda $ ${P_x}$ ${P_y}$ Upper 45° incident reflector −90° $(0.707, - 0.707,0)$ $(0,0,1)$ Upper 45° exit reflector 90° $(0.707, - 0.707,0)$ $(0,0,1)$ Lower 45° incident reflector 90° $(0.707, - 0.707,0)$ $(0,0,1)$ Fine tracking spectroscope 90° $(0,0,1)$ $( - 0.707,0.707,0)$ Fine tracking reflector 1 −90° $(0,0,1)$ $(0.707, - 0.707,0)$ FSM of fine tracking −90° $(0,0,1)$ $(0.707, - 0.707,0)$ Lower 45° exit reflector −90° $(0.707, - 0.707,0)$ $(0,0,1)$ Fine tracking reflector 2 90° $(0,0,1)$ $( - 0.707,0.707,0)$
Table 6. Experiment corresponds to spot coordinates
View tableView in ArticleTable 6. Experiment corresponds to spot coordinates
Spot Temperature Coordinate 1 Coordinate 2 Coordinate 3 Average Fine tracking 20 ℃ （+0.00,+0.00） （+0.00,+0.00） （+0.00,+0.00） （+0.00,+0.00） 25 ℃ （−9.31,+1.51） （−8.81,+1.73） （−8.97,+1.39） （−9.03,+1.54） Main laser 20 ℃ （+0.00,+0.00） （+0.00,+0.00） （+0.00,+0.00） （+0.00,+0.00） 25 ℃ （−1.18,+10.92） （−1.20,+10.70） （−1.37,+11.06） （−1.25,+10.89）
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Xiang Li, Chen Zhou, Yongqi Zhu, Keyan Dong, Liang Gao, Yan An, Wenqiang Xi, Yuhai Liu. Temperature adaptability of optical middle cabin of airborne high-energy laser system based on cage-type structure[J]. Infrared and Laser Engineering, 2024, 53(4): 20230663
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Received: Nov. 30, 2023
Accepted: --
Published Online: Jun. 21, 2024
The Author Email: Zhou Chen (chenrandom@163.com)
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