激光直射式放大测量杨氏弹性模量的研究

金属丝杨氏弹性模量测量的关键在于对于金属丝的微小长度量的精确测量．光杠杆放大测量法是一种常用方法，这种测量方法对于光路的调整有着严格地要求，测量难度大且不易掌握．在分析了光杠杆放大测量方法的特点后，对于测量装置进行了改进，建立了一种激光直射式放大测量杨氏弹性模量法．这种方法摒弃了光杠杆放大测量方法中光路调整复杂、望远镜测量精度不高等缺点．使得测量不仅方便、易调节，而且具有直观性强、精度高的特点，是测量杨氏弹性模量的一种新方法．

Measurement of Young''''s elastie modulus with laser straight amplification method

In the measurement of wire Young's modulus of elasticity of metal wire the accurate determination of wire minute stretch elongation was the key operation in the experiment.The optical lever amplification is a popular mothod,yet the adjustment of beam path is strictly required and not be easily mastered.Through analysis of the characteristic of the optical lever amplification method,the equipment is modified,and a new way of laser straight amplification method is introdused.The defects,such as complex beam path of optical lever amplification method and low accuracy measured by telescope,are done away with in the new method.The laser straight amplification method can not only be easily adjusted,but also better visualized with high accuracy,This is a new way to measure Young's modulus of elasticity.