微振动振幅的精密测量  

Precise measurement of micro-vibration amplitude

作　　者：汤俊雄[1] 万炼 吴义芳[1] 施清 郑乐民[1] 

机构地区：[1]北京大学无线电电子学系

出　　处：《光学学报》1989年第12期1092-1097,共6页Acta Optica Sinica

基　　金：国家自然科学基金

摘　　要：本文给出一种微振动振幅的精密测量方法.此方法采用光拍相位检测、伺服锁定干涉仪光程差和窄带检测技术,大大提高了信噪比.微振动振幅检测灵敏度达2.2×10^(-2)(?)/Hz^(1/2)(2kHz信号).A precise measuring method of micro-vibration amplitude is reported. Optical heterodyne phase detecting technique, servo looking for the optical path difference of interferometer and narrow band detecting technique are used. The signal to noise ratio is improved greatly. The sensitivity of amplitude measuring can reach 2.2×10-2 A/ (2 kHz signal).

关 键 词：光拍相位检测 振幅 伺服锁定 振动 

分 类 号：O329[理学—一般力学与力学基础]