共形结构不仅具有良好的空气动力学性能，且不存在由于表面不连续造成的热梯度等问题，因而采用该结构的导弹整流罩更有利于导弹系统作战性能的提高。但共形结构中采用的非球面罩曲面使整流罩表现出许多不同于球形结构的动态特性，这给导引头中光学系统的设计带来很多困难。在分析共形结构一阶特性的基础上，利用矢量像差理论详细分析该结构中初级像差产生的原因及特点，并提出通过控制元件的倾斜和偏心来平衡所有观察视场中像差的方法。软件分析结果表明：加入倾斜偏心元件后可适当放大小观察视场中的像差，共形整流罩在各观察视场中具有较为稳定的像差特性，有效地改善了该结构的成像质量。

Since the conformal structure has excellent aerodynamical performance and does not have the thermal gradient caused by the discontinuous surfaces,the missile radome with such structure may improve the velocity and effective range of the missile system. However,the curved surface of the aspherical radome used in the conformal structure allows the radome to have many dynamic characters different from the spherical structure,which makes it difficult to design the optical system in a target seeker. Based on analysis of the first-order characteristics of conformal structure,the reason why the primary order aberration is generated and its characteristics are analyzed according to the vector aberration theory,and a method to tradeoff the aberration in all the observation FOVs is proposed. The result of simulation shows that the addition of the tilt and off-center elements can magnify the aberration in narrow FOV,and can improve the imaging quality of this conformal structure.