Dynamic two-beam speckle interferometry

Mansour A. Ahmadshahi, Sridhar Krishnaswamy, Siavouche Nemat-Nasser

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The feasibility of two-beam speckle interferometry for the study of time-varying mechanical deformation of diffusely reflecting bodies is demonstrated. A sequence of speckle patterns produced by a vibrating cantilever beam was recorded photographically by means of a high-speed camera. These speckle photographs were subsequently digitized using a CCD camera for input into an image processing computer. By gray-level subtraction of carefully registered pairs of speckle images, fringes corresponding to the relative surface displacements were obtained. A sequence of these fringe patterns was reconstructed to obtain the time-history of deformation. These are compared with time-frozen (strobed) patterns for the same body.

Original languageEnglish (US)
Pages (from-to)620-627
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1554
DOIs
StatePublished - Dec 1 1991
Externally publishedYes
Event2nd International Conference on Photomechanics and Speckle Metrology 1991 - San Diego, United States
Duration: Jul 21 1991 → …

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Dynamic two-beam speckle interferometry'. Together they form a unique fingerprint.

Cite this