Cooled infrared off-axis freeform three-mirror system design with convenience in testing and assembly

被引：1

作者：

Zhu, Deyan ^{[1
,2
]}

Zhang, Yufan ^{[1
,2
]}

Hu, Zijia ^{[1
,2
]}

Liu, Yixuan ^{[3
]}

Guo, Pan ^{[3
]}

Su, Jingqin ^{[4
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Astronaut, Nanjing 210001, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Key Lab Space Photoelect Detect & Sensing Ind & In, Nanjing 210001, Peoples R China

[3] Beijing Inst Remote Sensing Equipment, Beijing 100005, Peoples R China

[4] China Acad Engn Phys, Laser Fus Res Ctr, Mianyang 621900, Peoples R China

来源：

APPLIED OPTICS | 2022年 / 61卷 / 36期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1364/AO.479208

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A cooled infrared off-axis freeform three-mirror system, especially with a small f-number and 100% cold stop effi-ciency, continues to present challenges in design, testing, and assembly. A primary mirror and tertiary mirror inte-grated structural model is proposed to design a cooled infrared off-axis three-mirror system that is convenient to test and assemble. In the proposed model, the f-number is used to calculate the parameters of the mirrors, and a freeform surface is adopted to achieve high imaging quality, which means the spot diagram radius (RMS) is smaller than the Airy radius. To evaluate the performance of the proposed method, two design examples with different f- numbers (2, 1.4) were constructed. The results showed that the cooled infrared off-axis three-mirror system can be designed with a small f-number, 100% cold stop efficiency, and high convenience in testing and assembly.(c) 2022 Optica Publishing Group

引用

页码：10794 / 10800

页数：7

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