毕业设计论文-手机照相镜头的光学设计

本科毕业设计论文题目：手机照相镜头的光学设计院、系：光电工程学院学科专业：光电信息工程学生：李民学号：040110111指导教师：陈智利阳志强2008年6月I手机照相镜头的光学设计摘要随着市场的发展，可拍照手机逐渐取代普通手机，而手机的小型超薄化也是必然趋势，手机的照相功能的提升和小型超薄化应并进，而二者又是相互制约的，因此尽量减小手机照相镜头的体积并提高其性能成为必然趋势。本文后半部分运用ZEMAX对所设计的镜头进行了调整和优化，用缩放法对初始模型反复调试和修改，并根据课题要求进行了数据分析，最终得出了符合设计要求的结果。最终设计结果为：镜头总长：10.07mm,后焦距：1.27mm。畸变范围-1.07到1.76之间。中心视场MTF@160lp/mm值为0.52。边缘视场MTF@120lp/mm值为0.53。关键字：可拍照手机镜头小型化ZEMAX优化。IIMobilelensdesignAbstractAlongwiththemarket’developmentdemand,phoneswhichcantakephotoswillreplacethecommonphone.Andthephoneswhichissmallandthinwillbethemainproduct.Forthis,smallerandthinnershouldgoalongwitheach.Butit’sdifficulttocomplete.Sothetrendofmobilelens’futureistomonishthevolumeandmaketheassemblebetter.Inthesecondpartofthisthesis,IuseZEMAXtodesignthelensandtrymybesttomakeitbetter,zoomtheoriginallenstodebugandalterit.Andanalysisthedataaccordingthetaskrequire.Infinal,Ireachthedesignpurpose.Finaldesign:totallengthofthelensis10.07mm,backfocallengthis1.27mm,distortionisfrom-1.07to1.76,theMTF@160lp/mmatzerofieldis0.52,theMTF@120lp/mmat0.7fieldis0.53Keywords:mobilewhichcantakephotos;lens;smaller;ZEMAX;optimizations.i目录摘要··········································································（Ⅰ）Abstract·····································································（Ⅱ）目录···········································································（1）1绪论········································································（1）1.1研究的目的和意义…………………………………………………（1）1.2可拍照手机和镜头设计的国内外发展…………………………（1）1.2.1可拍照手机国内外发展状况········································（1）1.2.2现今镜头设计的国内外发展状况·································（2）2手机照相镜头的成像原理介绍·······································（3）2.1可拍照手机照相原理……………………………………………（3）2.2感光元件简介……………………………………………………（3）2.3镜头结构分类及选择……………………………………………（3）2.4手机镜头的性能指标和相关术语…………………………………（4）2.4.1镜头类型选择的依据[7]···············································（4）2.4.2数码镜头鉴别率························································（4）2.4.3光圈范围·································································（4）2.4.4影响像质的几个因素·························································（5）3光学系统设计·····························································（6）3.1光学设计软件简介…………………………………………………（6）3.1.1ZEMAXMTF函数·······················································（6）3.1.2缺省的评价函数及优化··············································（6）3.1.3归一化的视场和光瞳坐标···········································（7）3.2设计要求及分析……………………………………………………（7）3.3初始结构的选择……………………………………………………（8）3.3.1视场角的确定·························································（10）3.3.2F数的确定·····························································（10）3.3.3工作波长的选择······················································（10）3.3.4调制传递函数图如下················································（11）3.3.5七种塞得像差分别为················································（11）3.3.6场曲和畸变图··························································（12）3.3.7点列图如下·····························································（12）ii3.3.8光线特性曲线图·······················································（13）3.4像差的初步校正…………………………………………………（13）3.4.1初步校正后的数据···················································（13）3.4.2二维光路图如下·······················································（15）3.4.3调制传递函数图如下：·············································（15）3.4.4场曲畸变图·····························································（16）3.4.5点列图···································································（17）3.4.6光线特性曲线图·······················································（17）3.5系统优化…………………………………………………………（18）3.5.1优化数据································································（18）3.5.2二维光路图·····························································（19）3.5.3点列图··································································（20）3.5.4场曲畸变示意图·······················································（20）3.5.5MTF分析图·····························································（21）3.5.6光线特性曲线图·······················································（23）3.6公差分析…………………………………………………………（24）3.6.1公差分析的一般过程················································（24）3.6.2公差分析方式介绍···················································（24）3.6.3此课题所进行的公差分析结果····································（25）3.7设计结果…………………………………………………………（27）4结论·······································································（29）致谢··········································································（30）参考文献····································································（31）1绪论11绪论1.1研究的目的和意义随着手机镜头相关工艺的实践，低端的数码相机已逐步被可拍照手机所取代。手机正逐步成为集通信、拍照、MP3、MP4等功能一体化的便捷式电子产品。由于现有的手机厚度较薄，限制了镜头的总长，从而使得手机镜头的性能提高较难。本课题要求设计一个体积小，高像素的手机镜头，从而减小手机镜头所占空间，进而提高手机的综合性能。实现小型化和多功能化。1.2可拍照手机和镜头设计的国内外发展1.2.1可拍照手机国内外发展状况从诺基亚7650、松下GD88和NECN8在中国掀起拍照风潮以来，手机拍照在中国已经历了三年的发展，谈到中国市场的可拍照手机，我们就躲不开索爱的T68lie和T628这条线。T68作为爱立信在中国市场推出的第一款彩屏手机，在当时可拍照手机还没有开始流行的时候，选择了使用外置摄像头来增加拍照功能无疑是一个明智的选择。而在爱立信和索尼合并之后，又推出了T68lie，且支持MMS功能。这两款机型可以使用爱立信和索尼爱立信前后推出的多款外置摄像头，虽然基本上没有后期处理功能，拍照的效果也不佳，但毕竟是开先河的第一次，也是可拍照手机在中国市场的探索者。后来索尼爱立信又推出了T618成为2003年最成功的可拍照手机，其内置10万像素的摄像头，有强大的数据处