## MATLAB眼镜片屈光度地形图测试技术研究

Title Method of Testing the Diopter Topography  in Ophthalmic lenses
Abstract
In our modern life, more and more people correct their vision by wearing glasses. As one of the significant parameters in optometry testing, diopter, determines that whether the quality of glasses is good. With the spinning development of various glasses, the traditional single-spot testing method cannot meet the demand of complexity measurements of aspherical lenses and free-form surface lenses nowadays. Diopter topography can be characterized by diopter properties of ophthalmic lenses point by point, it becomes the target of a new generation of measuring instruments.
During the previous research of diopter topography in ophthalmic lenses  based on Moire deflection technology, we analyze a method that combine Talbot effect and Moire effect, calculate the relationship between the diopter of lenses and the deflection of Moire fringes whether the lenses are placed in the system. In this experiment, we adjust the testing optical path, and deal with the Moire fringes in MATLAB. After comparing testing result with lensometer, we confirm the key points of diopter topography in ophthalmic lenses based on Moire deflection technology, and provide the basis for the instrument development.

Keywords  Moire deflection technology   diopter   MATLAB image processing

1  引言1
1.1  课题研究背景1
1.2  国内外发展趋势1
1.3  论文主要内容和结构安排1
2  测量眼镜片屈光度的方法 3
2.1  传统眼镜片屈光度测量方法  3
2.2  哈特曼法测量眼镜片屈光度  5
2.3  基于莫尔偏折技术的眼镜片屈光度测量方法  7
2.4  本章小结8
3  莫尔偏折技术的理论基础和原理9
3.1  莫尔条纹的概念和产生9
3.2  泰伯效应的原理11
3.2.1泰伯距离的计算11
3.2.2泰伯效应MATLAB仿真15
3.3  莫尔条纹倾角与眼镜片屈光度之间的关系17
3.3.1放置待测镜片后的泰伯距离计算17
3.3.2莫尔条纹倾角与眼镜片屈光度之间的计算18
3.4  本章小结20
4  基于莫尔偏折技术的眼镜片屈光度测量实验系统21
4.1  实验光路的设计与搭建21
4.2  实验结果与分析23
4.2.1利用MATLAB进行图像处理23
4.2.2实验数据整理及测量精度与实验可行性分析28
4.2.3实验目前的缺陷和可改进的地方31
4.3  本章小结33

1 引言
1.1 课题研究背景

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