Research on Optical System of Laser-Guided Weapon Based on Optical Plastic
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摘要: 随着光学塑料成型技术的不断发展，光学塑料透镜在各类光学系统中得到了广泛的应用。光学塑料具有便于大批量生产，设计灵活性高，重量轻和耐冲击等特点。本文进一步研究了光学塑料的特性，并结合激光制导武器光学系统的特点，分析光学塑料应用的可行性。在以上分析的基础上针对特定的光学系统参数，完成基于非球面光学塑料的光学系统设计，并对系统的光斑成像质量进行了分析，满足系统的使用要求。最后，针对光学塑料对温度变化比较敏感的问题，利用LightTools软件完成对激光制导武器探测系统的建模，分析不同温度环境下系统输出的和差比幅值偏差和角度的偏差，进一步验证光学塑料为系统带来的影响，确定其在光学系统中的适用性。Abstract: With the continuous development of optical plastic molding technology, optical plastic lenses are widely used in various optical systems. Optical plastics have the characteristics of convenient mass production, high design flexibility, light weight, and high impact resistance. This study further examines the characteristics of optical plastics and analyzes the feasibility of applying optical plastics combined with the characteristics of the optical system of laser-guided weapons. Thus, an optical system was designed based on aspheric optical plastics according to the specific optical system parameters, and the spot quality of the system was analyzed to meet the application requirements. Finally, to address the problem of optical plastics being sensitive to temperature changes, the laser-guided weapon detection system was modeled using the LightTools software. The sum–difference amplitude deviation and angle deviation of the system output under different temperature environments were analyzed to further verify the impact of optical plastics on the system and determine their applicability in optical systems.
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Keywords:
- optical plastic /
- aspheric lens /
- laser guided weapon /
- optical system
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表 1 材料性能对比
Table 1 List of material performance comparison
Material n Dispersion ρ/(g⋅cm-3) CLTE 10-7℃-1 dn/dt 10-6℃-1 PMMA 1.492 57.2 1.18 600 −106.3 PC 1.585 29.9 1.25 680 −107 E48R 1.531 55.8 1.01 600 −100 480R 1.525 56.3 1.01 700 −100 OKP-4 1.608 26.9 1.22 720 −130 H-K9L 1.517 64 2.49 77 2.5 H-ZF6 1.755 27 3.15 93 1.4 Al2O3 1.683 5.5 3.98 56 50 MgF2 1.354 13.4 3.18 107 19 Silicon 3.424 257 2.33 39 159 Germanium 4.021 108 5.33 61 424 ZnS 2.249 104 4.09 67 40 ZnSe 2.431 187 5.27 75 63 
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表 2 光学系统成像光斑在不同温度下的大小
Table 2 Spots size at different temperatures
Spots size /mm −45℃ 20℃ 60℃ 0° Field 8.38 8.07 7.88 5° Field 8.44 8.12 7.93 10° Field 8.42 8.08 7.87 15° Field 8.04 7.65 7.42 20° Field 7.74 7.46 7.28
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