Full-field laser heterodyne imaging vibrometry using a CMOS-DVR system

被引：2
|
作者：
Xiao, Wen [1 ]
Chen, Zonghui [1 ]
Pan, Feng [1 ]
Hou, Xueqin [1 ]
Hao, Hongliang [1 ]
Guo, Zhuang [1 ]
机构：
[1] Beihang Univ, Sch Instrumentat Sci & Optoelect Engn, Key Lab Precis Optomechatron Technol, Beijing 100191, Peoples R China
来源：
APPLIED OPTICS | 2021年 / 60卷 / 27期
基金：
中国国家自然科学基金;
关键词：
DOPPLER VIBROMETRY; HOLOGRAPHIC-INTERFEROMETRY; SPECKLE NOISE; SIDE-BAND; VIBRATION; PHASE; AMPLITUDE; DIRECTION; EXCITATION; FREQUENCY;
D O I：
10.1364/AO.431321
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A laser heterodyne imaging vibrometry is proposed for full-field vibration measurement. The vibration responses are imaged and recorded using a CMOS camera and a digital video recorder. A digital demodulation method based on a cumulative distribution function and autocorrelation is designed to demodulate signals affected by speckle noise. The experimental investigations confirm the viability of the proposed method for vibration measurement. Meanwhile, a comparison with laser Doppler vibrometry is performed to further validate the method. The results prove the proposed vibrometry is an effective and precise option for full-field vibration measurement. (C) 2021 Optical Society of America
引用
收藏
页码：8513 / 8523
页数：11
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