Self-mixing vibrometer with real-time digital signal elaboration

被引：56

作者：

Magnani, Alessandro ^{[1
]}

Pesatori, Alessandro ^{[1
]}

Norgia, Michele ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Elettron & Informaz, I-20133 Milan, Italy

来源：

APPLIED OPTICS | 2012年 / 51卷 / 21期

关键词：

LASER-DIODE; BLOOD-FLOW; DISPLACEMENT; INTERFEROMETRY; VELOCIMETER; MODULATION;

D O I：

10.1364/AO.51.005318

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This work describes the development of an optical sensor for measurement of vibration without contact. The realized vibrometer is based on real-time digital elaboration of the signal obtained by a self-mixing interferometer, with an embedded autofocus system. Two different algorithms are implemented, for the continuous working on diffusive surfaces, with different levels of optical reflectivity. Thanks to the autofocus and the digital processing, the proposed sensor is easy to use and requires no assistance of a skilled operator. (C) 2012 Optical Society of America

引用

页码：5318 / 5325

页数：8