| 二次曲面共形整流罩像差影响因素分析 |
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| 引用本文： | 张运强,常军,潘国庆.二次曲面共形整流罩像差影响因素分析[J].应用光学,2019,40(6):965-972. |
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| 作者姓名： | 张运强 常军 潘国庆 |
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| 作者单位： | 1.北京理工大学 光电学院，北京 100081 |
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| 基金项目： | 装备预研领域基金61404150201科技创新基金项目20176S001 |
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| 摘 要： | 传统整流罩为半球形或半球形的一部分，产生的空气阻力较大，不利于武器飞行速度的提高。基于空气动力学性能的考虑，采用共形整流罩的光学技术被提出。文章描述了二次曲面共形整流罩外表面、内表面的设计方法及面型表达式，通过在CODEV中建立共形整流罩的扫描成像模型，应用Zernike多项式分解法研究了不同长径比、边缘斜率、口径比和回转中心位置对离焦像差(Z4)、像散(Z5)、彗差(Z8)和球差(Z9)的影响规律。研究结果表明:二次曲面共形整流罩引入的离焦像差、像散、彗差和球差均随着长径比、边缘斜率和口径比的增加而增大，但对成像系统回转中心的位置不敏感。因此，在满足武器的空气动力学性能条件下应尽量减小长径比、边缘斜率和口径比，回转中心的位置主要根据结构需要进行设计。
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| 关 键 词： | 光学设计 共形光学 共形整流罩 二次曲面 Zernike像差 |
| 收稿时间： | 2019-07-09 |
Analysis of influence factors on aberrations introduced by quadric conformal domes |
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| Affiliation: | 1.School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China2.China Airborne Missile Academy, Luoyang 471009, China3.Key Laboratory of Aviation Science and Technology on Airborne Guided Weapons, Luoyang 471009, China |
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| Abstract: | Traditional domes are hemispherical or parts of hemisphere, which generate high air resistance and are not conducive to the improvement of the flight speed for weapons. Therefore, based on the aerodynamic performance, the optical technique adopting conformal domes was proposed. The design method and surface expression of outer surfaces and inner surfaces on quadricconformal domes were described. The scanning imaging model of conformal domes was established in CODEV, and the effect law of different aspect ratios, edge slopes, aperture ratios and rotation cente on defocus aberration (Z4), astigmatism Z5), coma aberration (Z8) and spherical aberration (Z9) withr was studied by Zernike polynomial decomposition method. The results show that, the defocus aberration (Z4), astigmatism (Z5), coma aberration (Z8) and spherical aberration (Z9) introduced by quadricconformal domes expand with the increase of aspect ratios, edge slopes, aperture ratios, but they are not sensitive to the position of the rotation center on imaging systems. Therefore, the aspect ratios, edge slopes and aperture ratios should be decreased under the condition of meeting the weapon aerodynamic performance, while the position of the rotation center is mainly designed primarily based on the structural needs. |
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