Chinese Optics, Volume. 16, Issue 3, 578(2023)
Design of reflector assembly and adhesive layer under airborne wide temperature conditions
Fig. 1. Principle of the airborne infrared searching and tracking system
Fig. 3. Profile view of mirror assembly along the axis of rotation
Fig. 6. Influence of RTV width on mirror shape and mirror group modal frequency
Fig. 7. Influence of RTV thickness on mirror shape and mirror group modal frequency
Fig. 8. Effect of epoxy adhesive thickness on mirror shape and mirror group modal frequency
Fig. 11. Displacement cloud diagram of the structural modal analysis. (a) First-order mode; (b) second-order mode; (c) third-order mode
Fig. 12. (a) Stress nephogram of a random vibration structure; (b) impact test stress nephogram
Fig. 13. Test site of mirror assembly. (a) Random vibration; (b) temperature impact test
Fig. 14. Optical path diagram for shape accuracy measurement of the mirror
Fig. 15. Measuring the surface shape accuracy of the integral structure
Table 1. List of materials for mirror assemblies
View tableView in ArticleTable 1. List of materials for mirror assemblies
Structure Material Density ρ/(g·cm−3) Young's modulus E/GPa CTE α(10−6/K) Thermal conductivity λ/[W/(m·k)] Specific stiffness E/ρ(10−6·GNm/g) Thermal distortion ratio λ/α(106W/m) mirror SiC 3.2 450 2.3 155.00 140 64.58 back plate, side plate, bushing part, embedded part, gasket 4J32 8.1 150 2.5 145.00 18.5 11
Table 2. Shape fitting results of the mirror under five working conditions
View tableView in ArticleTable 2. Shape fitting results of the mirror under five working conditions
环境温度 20 °C 20 °C 20 °C -40 °C 60 °C 重力方向 X轴 Y轴 Z轴 Z轴 Z轴 PV值/nm 25.91 22.12 55.45 123.87 96.78 RMS值/nm 3.73 3.63 10.25 25.91 17.55
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Jia-qi ZHANG, Yi-bo GUO, You-jian ZHANG, Zhi-hua ZHANG. Design of reflector assembly and adhesive layer under airborne wide temperature conditions[J]. Chinese Optics, 2023, 16(3): 578
Category: Original Article
Received: Sep. 16, 2022
Accepted: Nov. 2, 2022
Published Online: May. 31, 2023
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