薄凸透镜焦距测量方法的改进  

Design and research on focal length measurement method for thin lens

作　　者：费贤翔 李程鹏 王文华 李永强 FEI Xian-xiang;LI Cheng-peng;WANG Wen-hua;LI Yong-qiang(School of Electronic and Information Engineering,Guangdong Ocean University,Zhanjiang,Guangdong 524088,China;School of Chemistry and Environment,Guangdong Ocean University,Zhanjiang,Guangdong 524088,China)

机构地区：[1]广东海洋大学电子与信息工程学院,广东湛江524088 [2]广东海洋大学化学与环境学院,广东湛江524088

出　　处：《大学物理》2020年第3期36-38,共3页College Physics

基　　金：广东省自然科学基金(2015A030310354);教育部高等教育司产学合作协同育人项目(01701069003);广东海洋大学博士启动项目(R17003)资助

摘　　要：本文分析了薄凸透镜焦距测量中存在的问题,并利用消除视差的方式来测量薄透镜焦距,第一种用消视差自准直法,用眼睛来代替目镜系统,将对像清晰程度的调节变为对横向的物与像视差的调节,可以大大的减少由焦深带来的误差.第二种用消视差共轭法,利用物与像的对称性,来测量焦距,同时巧妙的利用消除视差的方式.测量结果表明,利用消视差的方式得到的测量结果更精确,可达到0.4%.This paper analyses the problems existing in the measurement of the foci of thin lens,and the method of parallax elimination is used to measure the focal length of thin lens.The first method uses self-collimation and eyes instead of eyepiece system,which can change the adjustment of the image clarity into the adjustment of the lateral object and image parallax,and can greatly reduce the error caused by the focal depth.The second method uses the conjugate method to measure the focal length by the symmetry of object and image,and at the same time skillfully uses the method of eliminating parallax.The measurement results show that the measurement results obtained by the method of parallax elimination are more accurate,reaching 0.4%.

关 键 词：自准直 共轭法 视差 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]