二次曲面共形整流罩像差影响因素分析

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.