Design and research of the large astronomical coaxial three-mirror telescope system

被引：0
作者：
机构：
[1] Department of Precise Mechanical Engineering, School of Mechatronic Engineering and Automation, Shanghai University
来源：
Cheng, H. (poyanglao@126.com) | 1600年 / Chinese Optical Society卷 / 33期
关键词：
Aberration theory; Optical design; Telescope; Three-mirror structure;
D O I：
10.3788/AOS201333.0522002
中图分类号：
学科分类号：
摘要：
Based on the first-order geometrical optics, the curvature and separation equation of coaxial three-mirror system with given structure parameters are derived. Setting Petzval sum to be zero as constraint condition, the original structure parameters of the three-mirror system are obtained. Moreover, according to the aberrations demand of the coaxial three-mirror telescope, the merit functions to optimize the spherical aberration, coma and astigmatism are defined by using Zemax. Consequently, high order aberration coefficients of the aspherical mirror of the telescope system are obtained. The aberration coefficients table, plot of diffraction encircled energy, wavefront map and modulation transfer function (MTF) are also obtained. The results indicate that the method can be used to get a reasonable structure of a coaxial three-mirror telescope. The design principles and methods are applicable to the off-axis three-reflection system.
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