三子镜稀疏孔径两反望远系统的研究

发布时间：2018-06-02 22:46

本文选题：稀疏孔径 + 两反望远系统　；参考：《苏州大学》2015年硕士论文

【摘要】：为了更好地对远处目标进行成像,人们对望远系统的分辨率的要求越来越高,这就需要大口径的望远系统。然而传统单一大口径望远系统在增大口径的同时,会导致光学系统重量增大、成本更高、体积更大等问题。为了能够在获得较高分辨率的同时而又突破口径大小的限制,人们开始寻求新的方法,其中使用稀疏孔径光学成像系统来代替传统的单一大口径望远系统是近年来研究的热门课题之一。本文详细介绍了稀疏孔径的研究背景、研究意义和国内外的研究现状。初步设计了全孔径的R-C两反望远系统,并把其中的主镜用三子镜稀疏孔径结构来代替。在此基础上,加入了两片校正镜,用光学设计软件ZEMAX进行优化,平衡各种像差,得到初级像差极小的三子镜稀疏孔径望远系统。当该系统存在装调误差——平移误差或倾斜误差时,进行了模拟成像。采用相对模糊度函数,当子镜存在不同大小的平移误差或倾斜误差时,用相对模糊度描述系统所成图像的模糊程度。然后,对一个含有一定量装调误差的系统,在焦面和离焦面各取一幅图像,利用相位差异法对两幅图像进行分析,计算出系统所包含装调误差的大小,并根据检测的结果对原目标图像进行恢复,得到较为清晰的图像。最后,论文对工作进行了总结,并指出下一步需要展开的工作。
[Abstract]:In order to better image the distant targets, the resolution of the telescopic system is required more and more, which requires a large caliber telescopic system. However, the traditional single large aperture telescopes increase the aperture, which will lead to the increase of optical system weight, higher cost, larger volume and so on. In order to be able to achieve higher resolution while breaking the aperture size limit, people began to look for new methods. The use of sparse aperture optical imaging system to replace the traditional single large aperture telescope system is one of the hot topics in recent years. In this paper, the research background, significance and research status of sparse aperture at home and abroad are introduced in detail. In this paper, we design a R-C two-reflector system with full aperture, and replace the primary mirror with a three-submirror sparse aperture structure. On this basis, two correction mirrors are added, optimized by optical design software ZEMAX, and various aberrations are balanced, and a three-sub-mirror sparse aperture telescope system with minimal primary aberration is obtained. When the system has the adjustment error-translation error or tilt error, the simulation imaging is carried out. The relative ambiguity function is used to describe the ambiguity degree of the system image when there are translation errors or tilting errors of different sizes in the submirror. Then, one image is taken from the focal plane and one image from the defocus plane for a system with a certain amount of adjustment error. The two images are analyzed by using the phase difference method, and the magnitude of the adjustment error contained in the system is calculated. According to the result of detection, the original target image is restored and a clearer image is obtained. Finally, the paper summarizes the work and points out the work to be carried out next.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH743

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