推帚式成像光学系统技术方案探究

发布时间：2018-06-05 10:00

本文选题：推帚式成像 + 离轴三反系统　；参考：《浙江大学》2016年硕士论文

【摘要】：推帚成像方式是目前航空航天仪器中应用十分广泛的一种成像方式,它具有结构简单、积分时间长、易于实现中高分辨率成像等优点。在成像方式确定之后,光学系统就成为决定仪器性能的重要因素。本文对推帚式成像光学系统的设计方案进行探究,主要完成了以下几项工作：(1)根据系统工作要求,论证分析了光学指标与参数,定性分析了全反射光学系统与折射光学系统的各种典型结构型式的特性,在此基础上,为本文的推帚式成像光学系统的设计方案做出了选择；(2)推导了离轴三反系统初始结构计算方法。在相同的光学设计指标下,分别对离轴三反系统和双高斯系统展开了设计,得到了F/4.8、F/2.4、F/1.6的多组设计结果,以“F/2.4, FOV=32°×1°"的离轴三反系统和“F/2.4,FOV=32°”的双高斯系统为例,从公差分析、热分析、杂散光分析、装调分析几个方面对设计结果进行了全面的对比、分析与总结,直观展现了这两种结构型式光学系统的综合性能及特点,为推帚式成像光学系统的设计选型提供了参考；(3)设计中大量应用非球面,文中讨论了非球面的检验方法,对透镜补偿法检验非球面的设计原理以及补偿镜初始结构计算方法做了详细推导,以一组典型的离轴三反系统设计结果为例,采用无像差点法和补偿法设计了主、次、三镜的检验方案。
[Abstract]:Push broom imaging is a widely used imaging method in aerospace instruments at present. It has the advantages of simple structure, long integral time and easy to realize the middle and high resolution imaging. After the imaging mode is determined, the optical system becomes an important factor to determine the performance of the instrument. In this paper, the design scheme of the push-broom imaging optical system is studied. The following work is accomplished: 1) according to the system working requirements, the optical indexes and parameters are demonstrated and analyzed. The characteristics of various typical structures of total reflection optical system and refraction optical system are qualitatively analyzed. The method of calculating the initial structure of the off-axis three inverse system is derived for the design scheme of the push-broom imaging optical system in this paper. Under the same optical design index, the off-axis three counter system and the double Gao Si system are designed respectively, and the results of multiple design of F / 4.8 / F / 2.4 / F / 1.6 are obtained. Taking the off-axis triple inverse system with "F / 2.4, FOV=32 掳脳 1 掳" and the double Gao Si system with "F2.4 / 4 FOV32 掳" as examples, the tolerance analysis is made. The results of thermal analysis, stray light analysis and installation analysis are compared, analyzed and summarized, and the comprehensive properties and characteristics of the two types of optical systems are shown directly. A large number of aspherical surfaces are used in the design of push-broom imaging optical system. The test method of aspherical surface is discussed in this paper. The design principle of testing aspherical surface by lens compensation method and the calculation method of initial structure of compensating mirror are deduced in detail. Taking a group of typical off-axis three inverse system design results as examples, the principal and second parts are designed by using image free handicap method and compensation method. Three mirror inspection scheme.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V241

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