一种简易测量凹透镜焦距的方法  

An Easy Way to Measure Concave Lens Focal Length

作　　者：吴发强[1] 

机构地区：[1]楚雄师范学院物理与电子科学系,云南楚雄675000

出　　处：《实验科学与技术》2009年第6期157-159,共3页Experiment Science and Technology

摘　　要：介绍了一种测量凹透镜焦距的新方法。该方法根据各光学元件的成像特点,应用点光源、凹面镜作为辅助测量工具,就可精确测量出凹透镜的焦距测量时,当把仪器安装、调节好之后,只需移动凹面镜,通过观察远方光屏上像的变化情况,来确定反射光延长线的交点与凹透镜焦点是否重合,当"两点"重合之后,再经过一些简单的实验过程和计算,就可得到凹透镜的焦距。该方法数据处理简单,实验原理、过程巧妙,测量结果精确。This paper introduces a new method to measure concave lens focal length. This method is works according to the trait of optics component imaging. Only by using the point light source, concave mirror as supplementary instruments, we can measure Concave Lens Focal Length. Using this way to measure of Concave Lens Focal Length, when we have set up the apparatus for the experiment, move the concave mirror. If the image of on the far away optical screen most brightness, we can believe the two points have matched together. After some easy counting, we can get the experimental result. This method can reduce the calculating, . and the result is more precise.

关 键 词：凹透镜 焦距 点光源 

分 类 号：O432.2[机械工程—光学工程] G642.423[理学—光学]