Design method of freeform off-axis three-mirror reflective imaging systems

被引：4
|
作者：
Zhao, Huaixue [1 ,2 ]
Gao, Limin [2 ]
Mao, Xianglong [2 ]
Duan, Yaxuan [2 ]
Xue, Xun [2 ]
机构：
[1] Univ Chinese Acad Sci, Sch Optoelect, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China
来源：
APPLIED OPTICS | 2023年 / 62卷 / 29期
关键词：
Characteristic point - Datapoints - Design method - Field of views - Free-form surface - Freeforms - Off-axis - Optimisations - Special algorithms - Three-dimensional shape;
D O I：
10.1364/AO.498270
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, a novel, to the best of our knowledge, method is proposed to design a freeform off-axis three-mirror reflective imaging system. A special algorithm is demonstrated to calculate the data points on the unknown freeform surface using the rays from the pupil of the center field. Then the three-dimensional shape of the freeform surface is solved by these characteristic points, which serves as a good starting point for further optimization. The benefit of this design method is demonstrated by designing a freeform off-axis three mirror imaging system with high performance. The final system operates at F/2 with an entrance pupil diameter of 400 mm and a field of view of 2.4 degrees x 2.4 degrees. The modulation transfer function (MTF) value of the system reaches 0.6 at 100 lp/mm or higher at all fields of view. (c) 2023 Optica Publishing Group
引用
收藏
页码：7852 / 7859
页数：8
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