摘要
提出一种可测量振动频率 1.5kHz光驱振幅及光盘裂纹的简单实用方法。该方法通过激光束在光盘与平面镜之间的多次反射 ,将光盘振动引起的光偏移量放大 ,从而简化了光盘振幅的测量。介绍了该方法的基本测量原理、光刀形成方法及信号采集、处理电路的设计 。
A simple and practical measuring method for vibrating amplitudes of CD ROM vibrating with a frequency of 1.5 kHz and CD cracks is proposed. Through multiple reflections of a laser beam between a CD and a parallel mirror, a laser beam displacement caused by the CD vibration can be enlarged, so that the measurement of the amplitude is simplified. The measuring principle, the formation of light knife and the design of signal collecting and processing circuits are introduced. And a measuring example is presented.
出处
《工具技术》
北大核心
2001年第3期36-38,共3页
Tool Engineering
基金
国家行动计划"MEMS智能仪器及其基础理论与技术"资助项目
关键词
振幅测量
光刀
半导体激光器
面阵CCD
多次反射
光盘驱动器
CD ROM driver, amplitude of vibration, measurement, light knife, semiconductor laser, array CCD, multiple reflection
