Dual-probe laser interferometer

Jin Huang, Jan Drewes Achenbach

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

A single-probe heterodyne laser interferometer has been modified to a dual-probe modality by utilizing the reference beam as a second probe. It is shown that the two probing beams display the same sensitivity, independent of the difference in reflectivities at the two points of detection on the specimen. The dual-probe interferometer allows measurements of the same surface wave signal at two points. The instrument is particularly suited for the measurement of the speed and attenuation of surface waves. The interferometer has been employed to determine phase velocities and attenuation coefficients for surface wave propagation over an aluminum plate with increasing degrees of surface roughness.

Original languageEnglish (US)
Pages (from-to)1269-1274
Number of pages6
JournalJournal of the Acoustical Society of America
Volume90
Issue number3
DOIs
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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