Optical Probing of Acoustic Emission Waves.

Abstract

Optical probing is a newly developed technique for quantitative study of acoustic emisssion. It has great advantages over other techniques, especially piezoelectric probing: It is non-contract and does not disturb the signals, it is absolutely calibrated, has a sensitive area only tens of microns diameter, can make measurements within a millimeter of a source, can be used to probe internally in transparent materials, and has an extremely wide, flat bandwidth. With our optical probe we have measured extremely short rise times, amplitudes of 1 to 10 angstroms, and signals characteristics of their sources-at least in some cases. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 31, 1979
Accession Number
ADA074160

Entities

People

  • C. Harvey Palmer
  • Robert E. Green Jr.

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Detection
  • Detectors
  • Doppler Effect
  • Materials
  • Materials Science
  • Measurement
  • Optical Detection
  • Optical Detectors
  • Optics
  • Piezoelectric Transducers
  • Radio Frequency Amplifiers
  • Sound Waves
  • Spectrum Analyzers
  • Ultrasounds

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Optical Physics and Photonics.