摘要
传统测量透镜焦距的方法通过肉眼读数粗测,误差较大.电测法测量透镜焦距通过光电传感器将光信号转变成电信号,结合电阻率定义及欧姆定律推导出利用电信号直接计算透镜焦距的公式.该方法设计思路简单,操作方便,且能准确有效地测量透镜的焦距.
Traditional method for measuring lens focal length is to find the brightest facula with naked eyes,thus the data should be coarse with big error.Electrical measuring method transform light signal into electrical signal by aphotoelectric sensor.Combining ohm′s law with resistivity,we deduce a formula to calculate the focal length with electrical signal directly.To measure the focal length of lens accurately and efficiently,this method has strong maneuverability.
出处
《物理通报》
2015年第2期63-65,共3页
Physics Bulletin
基金
2013年国家级大学生创新实验项目“物理师范教育卓越教师培养计划探索”,项目编号:13ZHB02
