摘要
对激光经过超声晶体光栅调制从而利用相位差和光程差进行光速测定进行了理论分析和实验研究。结果表明,在光速测定时超声波频率的选择并不影响测量结果,但在晶体谐振频率附近进行测量更有利于光强波形的观察和结果的测定。这一结论在同类实验问题的操作上具有一定的指导意义。
The principle of measuring the light velocity with the method of wave modulation by ultrasonic diffraction crystal grating is analysed, and the experiment method is introduced. The value of light velocity in measurement doesn＇ t vary with the ultrasonic frequency. But measuring at the resonance frequency of ultrasonic diffraction crystal grating is propitious to watch the wave of light intensity and obtain the result of measurement.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2007年第4期537-538,542,共3页
Optical Technique
关键词
物理光学
超声晶体光栅
拍频
光速
测量
physical optics
ultrasonic diffraction crystal grating
beat frequency
light velocity
measurement
