物镜像法--一种调节杨氏模量实验仪的新方法

摘要

拉伸法测量杨氏模量的难点是测量样品在外力作用下所对应的微小长度变化量，而微小长度变化量的测量方法是应用了光杠杆原理。在仪器调节时，由于望远镜的孔径较小，用望远镜观察光杠杆反射镜中直尺的刻度线较困难。本文提出用物镜像法调节仪器，可以简单、快速地解决上述问题。%The difficulty of measuring young ' s modulus by the pulling method is the small length change of samples under the action of the external force,and the optical lever method is the most common way applied to take the measurement.During the apparatus adjustment,due to the small aperture of telescope,observing scale is more difficult with a telescope.In this paper,we propose a new method to adjust apparatus based on the im-age of objective lens,it will be simple and fast to solve the above problems.