长焦距镜头的装校与技术研究

发布时间：2018-08-15 12:15

【摘要】：随着空间光学的高速发展,对于大口径、长焦距、高分辨率的光学系统的需求量日趋增大。光学装校是实现设计结果的最后一道关键工序,对该技术的要求也越来越苛刻。本文工作涉及一个15m焦距成像镜头,研究工作围绕该成像镜头的装校技术展开。给出了15m焦距成像镜头的设计结果,分析温度变化和透镜间空气间隔变化对该成像镜头的结构参数和光学性能参数的影响。根据镜头的光学结构和机械结构,提出了一种使用三坐标测量仪结合Zemax软件辅助的装校方法。介绍了三坐标测量仪,阐述了使用三坐标测量仪测试透镜中心偏差的原理。分析成像镜头结构中的装校难点,设计出成像镜头的装校方案。根据装校过程中的测试数据,计算出透镜中心偏差,验证了各透镜光轴与镜筒中心轴的重合程度满足设计要求,从而说明系统的光轴一致性。透镜间空气间隔的计算结果满足设计要求。使用Zemax软件对实测结果进行模拟,给出优化方法。使用两种方式测试成像镜头的焦距,测试结果与理论值偏差分别为-1.12%和-1.24%。各视场下弥散斑测试值不超过1.5mm。视场的测试结果大于6°×6°。各性能参数测试结果均满足指标要求,从而验证了该装校方法的可行性。
[Abstract]:With the rapid development of space optics, the demand for large aperture, long focal length and high resolution optical systems is increasing. Optical mounting and calibration is the last key process to realize the design results, and the requirements of the technology are becoming more and more stringent. The work of this paper involves a 15m focal length imaging lens. The design results of a 15m focal length imaging lens are presented. The effects of temperature change and air interval between lenses on the structure parameters and optical performance parameters of the lens are analyzed. According to the optical and mechanical structure of the lens, this paper presents a method of setting and calibrating the lens by using the coordinate measuring instrument (CMM) and Zemax software. The principle of measuring the center deviation of lens by CMM is introduced in this paper. This paper analyzes the difficulty of assembling and calibrating the structure of imaging lens, and designs the plan of assembling and calibrating the imaging lens. According to the test data during the calibration process, the deviation of the lens center is calculated, and the coincidence degree between the optical axis of each lens and the central axis of the mirror tube meets the design requirements, which shows the consistency of the optical axis of the system. The calculation results of air interval between lenses meet the design requirements. The Zemax software is used to simulate the measured results and the optimization method is given. The focal length of the imaging lens is measured in two ways. The deviation between the measured results and the theoretical values is -1.12% and -1.24% respectively. The measured values of dispersion spots in each field of view are not more than 1.5 mm. The measured results of the field of view are greater than 6 掳脳 6 掳. The test results of the performance parameters all meet the requirements of the index, which verifies the feasibility of the calibration method.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TB851

【参考文献】