基于光栅的泰伯-莫尔法长焦距测量方法研究
时间:2017-05-22 19:53 来源:毕业论文 作者:毕业论文 点击:次
| 摘要长焦距透镜的焦距测量，在激光核聚变驱动器，天文光学系统，空中遥感相机等领域有着很重要的应用价值。本论文对泰伯效应的原理和莫尔条纹技术的原理进行了详细的讨论和研究。从理论上模拟了这种方法的可行性，分析了这种方法的测量精度以及产生误差的原因。并且提出利用傅里叶频谱的迭代算法精确求莫尔条纹的角度可以显著提高测量的精度。构建了基本的长焦距测量系统的设计装置，从方案设计原理，到硬件软件的设计，并进行了实验，得出了具体的被测焦距的实验值。实验结果说明采用泰伯莫尔测量光学系统长焦距，再加上有效的图像采集和数字处理方法，其精确度可以得到较大的提高。 关键词：泰伯效应、莫尔条纹技术、长焦距测量、Ronchi光栅、泰伯像。8990 毕业设计说明书（论文）外文摘要 Title The research to a method of the long focal length measurement based on Talbot effect and moiré fringe technology of the grating Abstract A long-focal-length lens the focal length of the measurements has a very important application value in the fields of the laser fusion drive, astronomical optical system and remote sensing camera. In this dissertation, the principle of Talbot effect theory and moiré fringe technology was discussed in detail and research. On the basis of Talbot effect and moiré fringe technology, a novel method for the long focal length measurement of large aperture lens was presented. The feasibility of this method was analyzed, the accuracy of this method was discussed and also the factors that would affect the measurement accuracy was demonstrated. Iterative method was used in the Frequency domain of the moiré fringe image to accurately calculate the angle of the moiré fringe. This dissertation introduces a set of long focal length measurement system, from design principle, the hardware and software design. Experimental results show that the measuring optical system taber Moore long-focal-length, plus effective image acquisition and digital processing method, the precision can be improved to get bigger. Keywords: Talbot effect, moiré fringe technology, the long focal length measurement, Rinchi grating, Talbot images. 目 录 1 绪论 1 1.1 研究背景以及意义 1 1.2 光学系统中焦距测量的几种方法概述 1 2 泰伯效应和莫尔条纹理论 6 2.1 泰伯效应 6 2.2泰伯效应的应用 16 2.3 莫尔条纹和莫尔偏折术 16 2.4 莫尔条纹技术的应用 17 2.5 本章小结 18 3 长焦距测量理论 19 3.1 球面波照射Ronchi光栅时的Talbot效应 19 3.2莫尔条纹的产生 21 3.3最长Talbot距离 22 3.4焦距测量公式 23 3.5 本章小结 24 4 实验装置与实验过程 26 4.1 硬件系统 27 4.2 软件系统 30 4.3数字图像的获得 30 4.4 条纹处理 31 4.5 本章小结 33 5 误差理论分析与测试结果 34 5.1长焦距测量公式中各个物理量的测量误差： 34 5.2 外界条件产生的误差 37 5.3 测量结果 37 5.4 本章小结 39 结 论 40 (责任编辑：qin) |