Design and distortion characteristics analysis of the large-image-field off-axis three-mirror telescope

被引：0
作者：
Chen, Yang [1 ,2 ]
Wang, Yueming [1 ]
机构：
[1] Shanghai Institute of Technical Physics, Chinese Academy of Sciences
[2] University of Chinese Academy of Sciences
来源：
Guangxue Xuebao/Acta Optica Sinica | 2013年 / 33卷 / 02期
关键词：
Distortion; Imaging spectrometer; Off-axis three-mirror system; Optical design; Telescope system;
D O I：
10.3788/AOS201333.0222003
中图分类号：
学科分类号：
摘要：
The low-distortion, large-image-field telescope is the key to the precise image fusion and registration of wide-band hyperspectral imaging system. Based on the analytical methods and vector aberration theory, the distortion of the off-axis three-mirror optical system is analyzed. A new method to design the low-distortion off-axis three-mirror optical system is proposed. A coaxial three-mirror optical system is designed by analytical methods and then the original system is made off-axis. Then the system is optimized according to analysis based on the vector aberration theory. An optical system is designed which is characterized by the system focal length of 1000 mm, cross track field of 5.6°, along track field of 1° and F number of 5. The maximum distortion measured by Zemax software is only 0.0628%. This method can be applied to design telescopes not only in the large-field and high-resolution imaging spectrometer system, but also in the occasions that demand low distortion.
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