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长出瞳距离轴四反光学天线的设计研究

Design of Off-Axis Four-Mirror Optical Antenna with Long Exit Pupil Distance

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摘要

传统离轴反射光学天线的出瞳距较短,需要中继光学系统将出瞳成像于快反镜附近,这会增加后续光路和结构的复杂度,且中继光学系统的后向散射光会对激光通信终端产生严重的影响。针对上述缺陷,设计了长出瞳距离轴四反光学天线,该光学天线的出瞳被直接设计在快反镜上,省去了中继光学系统。首先,从同轴三反像差理论出发,推导了像差表达式和初始结构方程。然后,基于像差理论和出瞳位置要求,计算了离轴四反光学天线的初始结构参数,并采用Zemax软件对初始结构进行光线追迹和性能优化。最后采用Zemax对离轴四反光学天线进行了公差分析。结果表明:所提系统性能优异,结构紧凑,加工和装调公差合理,满足激光通信终端性能要求。

Abstract

Traditional off-axis reflecting optical antennas have the disadvantage of short exit pupil distance, leading to the fact that a relay optics is required to re-image the exit pupil on the fast steering mirror and thus the following optical paths and structures are complicate. Moreover, the backward scattering light in the relay optical system has a severe influence on the laser communication terminals. To overcome the above defects, we design an off-axis four-mirror optical antenna, in which the exit pupil of optical antenna is directly designed on the fast steering mirror and thus the relay optical system can be removed. First, the aberration formulas and the initial structural equation are deduced based on the theory of coaxial three-mirror aberration. Then, the initial structural parameters of the off-axis four-mirror optical antenna are calculated according to the aberration theory and the requirement of the exit pupil position. In addition, the ray tracing and the performance optimization of the initial structure are implemented using the Zemax software. Finally, the tolerance analysis of the off-axis four-mirror optical antenna is conducted. The results illustrate that the designed system has the advantages of excellent performance, compact structure, and reasonable manufacture and alignment tolerance. The performance of the designed system can meet the requirements of laser communication terminals.

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中图分类号:TN929.1

DOI:10.3788/AOS202040.1822001

所属栏目:光学设计与制造

基金项目:装备预研航天科技联合基金;

收稿日期:2020-04-17

修改稿日期:2020-05-29

网络出版日期:2020-09-01

作者单位    点击查看

田棋杰:中国空间技术研究院西安分院, 陕西 西安 710100
张建华:中国空间技术研究院西安分院, 陕西 西安 710100
张缓缓:中国空间技术研究院西安分院, 陕西 西安 710100
宋延松:中国空间技术研究院西安分院, 陕西 西安 710100
薛婧婧:中国空间技术研究院西安分院, 陕西 西安 710100
呼新荣:中国空间技术研究院西安分院, 陕西 西安 710100
陈祥:中国空间技术研究院西安分院, 陕西 西安 710100
李帅:中国空间技术研究院西安分院, 陕西 西安 710100

联系人作者:田棋杰(tian7jie@163.com)

备注:装备预研航天科技联合基金;

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引用该论文

Tian Qijie,Zhang Jianhua,Zhang Huanhuan,Song Yansong,Xue Jingjing,Hu Xinrong,Chen Xiang,Li Shuai. Design of Off-Axis Four-Mirror Optical Antenna with Long Exit Pupil Distance[J]. Acta Optica Sinica, 2020, 40(18): 1822001

田棋杰,张建华,张缓缓,宋延松,薛婧婧,呼新荣,陈祥,李帅. 长出瞳距离轴四反光学天线的设计研究[J]. 光学学报, 2020, 40(18): 1822001

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