为了实现非完善成像离轴三反系统的高质量装调,提出了一种置于三反系统焦点前的像差补偿系统的设计方法。基于高斯光学,推导了补偿系统参数与像点空间位置的关系,并根据三级像差理论,设计出补偿系统的初始结构。利用有效口径为400 mm、F数为3.9的离轴三反系统,对所提方法进行了分析,验证了方法的可行性。所提方法有效提高了优化效率,适用于多种类型的反射系统。最终设计结果以相对较小的口径实现了非完善成像离轴三反系统的高质量装调,有效降低了装调成本,提高了装调效率。

In order to achieve the high quality alignment of an imperfect imaging off-axis three mirror system, a design method of aberration compensation system placed in front of the focus of the three mirror system is proposed. Based on Gaussian optics, the relationship between the parameters of the compensation system and the spatial position of the image points is derived. In addition, the initial structure of the compensation system is designed according to the third-order aberration theory. An off-axis three mirror system with an effective aperture of 400 mm and an F number of 3.9 is adopted to test the proposed method and the feasibility of this method is verified. The proposed method can effectively improve the optimization efficiency and is suitable for various types of reflection systems. The final design results can achieve the high-quality alignment of an imperfect imaging off-axis three mirror system with a relatively small aperture, effectively reduce the assembly-alignment cost, and improve the assembly-alignment efficiency.