An optical method for the detection of in-plane motion of acoustic waves propagating in solids

Che Hua Yang*, Yua Ching Tsai

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

Abstract

A new interference-based optical technique called in-plane displacement interferometer (IPDI) is introduced for the detection of in-plane (IP) motion of ultrasonic waves. The IPDI employs a tiny square indentation of about 30 microns in width on the sample surface and a relatively simple optical arrangement for the detection of IP motion of ultrasonics waves. With the IPDI, measurement of IP motions of Lamb waves propagating along a thin brass foil is demonstrated. Dispersion relations for the So mode dominated by in-plane motion in the low fd (frequency times thickness) regime is obtained with the IPDI.

Original languageEnglish
Pages (from-to)91-94
Number of pages4
JournalKey Engineering Materials
Volume321-323 I
DOIs
StatePublished - 2006

Keywords

  • In-plane motion
  • Indentation
  • Lamb wave
  • Laser ultrasound

Fingerprint

Dive into the research topics of 'An optical method for the detection of in-plane motion of acoustic waves propagating in solids'. Together they form a unique fingerprint.

Cite this