OPTICAL-DETECTION OF TRANSIENT LAMB WAVES ON ROUGH SURFACES BY A PHASE-CONJUGATE METHOD

被引：11

作者：

MATSUDA, Y

NAKANO, H

NAGAI, S

机构：

[1] National Research Laboratory of Metrology, Tsukuba, Ibaraki, 305

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1992年 / 31卷 / 7B期

关键词：

LASER-GENERATED ULTRASOUND; LAMB WAVE; ROUGH SURFACE; OPTICAL DETECTION; PHASE-CONJUGATE MIRROR;

D O I：

10.1143/JJAP.31.L987

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A convenient method is described for optically detecting Lamb waves on rough surfaces. A pulsed YAG laser excites Lamb waves, which are detected in a noncontact manner by a Michelson interferometer with a self-pumped phase-conjugate mirror. The present method automatically corrects the wavefront distortion caused by rough surfaces and also shows a flat spectral response over large bandwidths necessary for the analysis of the dispersion relationship. To illustrate the validity of the method, experimental results are presented for two kinds of thin plates.

引用

页码：L987 / L989

页数：3

共 11 条

[1] ESTIMATION OF THE THICKNESS OF THIN METAL SHEET USING LASER GENERATED ULTRASOUND [J].