摘要
介绍了一种双纵模双频激光精密测距的工作原理,信号处理及误差分析。测距仪是以频差800MHz(对应波长长度为380mm)的波长为测量基准进行测量的,对不足半个波长的长度是利用双频激光干涉仪的原理进行测量的。对该测量方法精度的理论和实验研究后,可以确定出总的测量精度为±(50±1.5×10-6L)μm。
The paper described principle, signal processing and error analysis of two-longitudinal modes and two frequencies laser’s precision ranger finder. The ranger finder use the beat wavelength of 550-650MHZ as the basic measuring unit and use two frequencies laser interferometer to measure not enough half the beat wavelength’s length.After theoretical investigation and experimental researches to the method’s accuracy. We can conduct the total accuracy, it is
出处
《机械》
2004年第12期14-15,18,共3页
Machinery
关键词
拍频波长
节点确定
激光
beat wavelength
node determination
laser
