Gong Tongtong, Jin Guofan, Zhu Jun
Opt Express. 2016 Dec 26;24(26):29417-29426. doi: 10.1364/OE.24.029417.
It is of urgent need to develop a point-by-point design method for off-axis aspheric systems in full field and full aperture. So a general full-field point-by-point method for off-axis aspheric systems is presented in this paper, in which light rays from different field angles and aperture coordinates are considered. Surface fitting is included during the point calculations, rather than after all the points are calculated. Data point calculations and aspheric surface fitting are repeated continuously to calculate an unknown aspheric surface. Both coordinate and surface normal deviations are considered. As an example, an aspheric off-axis three-mirror reflective system is designed to operate at F/2.4 with a 100-mm entrance pupil diameter and a 3° × 6° off-axis field of view. This method can also be used to design co-axial aspheric systems and novel systems with new structures.
迫切需要开发一种用于离轴非球面系统全场和全孔径的逐点设计方法。因此，本文提出了一种通用的离轴非球面系统全场逐点方法，该方法考虑了来自不同视场角和孔径坐标的光线。在点计算过程中进行曲面拟合，而不是在所有点计算完成后进行。数据点计算和非球面拟合不断重复以计算未知的非球面。同时考虑了坐标偏差和表面法线偏差。例如，设计了一个非球面离轴三镜反射系统，其工作在F/2.4，入瞳直径为100mm，离轴视场为3°×6°。该方法也可用于设计同轴非球面系统和具有新结构的新型系统。
