用激光扫描法演示简谐振动图像  

Demonstrate Harmonic Vibration Image by Using the Laser Scanning Method

作　　者：肖贵膑 代伟[1] 段晨靓 李青[1] 汤廷 

机构地区：[1]西华师范大学,四川南充637002

出　　处：《大学物理实验》2016年第3期44-46,共3页Physical Experiment of College

基　　金：四川省研究生教育改革创新项目(445001)

摘　　要：针对传统探究简谐振动图像的实验存在的不足,重新设计了实验装置,该装置利用半导体激光为光源,巧妙地将竖直方向的简谐振动和水平方的往复运动进行合成得到了简谐振动图像。通过观察屏幕上光点振动展开后形成的正弦(或余弦)曲线的全过程,可方便学生更好地理解简谐振动图像的形成原理。A device was designed to overcome the shortages of the experiment to explore the image of harmonic vibration.The device used semiconductor laser as light source. By synthesizing the harmonic vibration in the vertical direction and the reciprocating motion in the horizontal direction,the image of harmonic vibration was obtained.By observing the whole process of sine ( or cosine) curve after the light vibration unfolded on the screen,the students can understand the principle of harmonic vibration better.

关 键 词：激光 简谐振动 正弦曲线 

分 类 号：G633.7[文化科学—教育学]