Automated Laser Speckle Interferometry Displacement Contour Analyzer.

Abstract

This work presents a new technique and experimental equipment to analyze Young's Fringe speckle interferograms. A new method using an off-axis optical photodetector was developed for generating displacement contour maps of bodies when deformed under load. Laser speckle interferograms are made of the deformed body and analyzed with a special displacement contouring computer analyzer. Interferograms of a flawed composite tube were analyzed by the system and are presented in the work. Currently operating at about 20% of its maximum rated speed, the system can analyze 5000 data points in less than four minutes. This report presents both the theory and hardware which may be utilized to generate displacement contour maps of deformed bodies. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 02, 1979
Accession Number
ADA075109

Entities

People

  • John A. Schaeffel Jr.

Organizations

  • United States Army Aviation and Missile Command

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Analyzers
  • Composite Materials
  • Computer Programs
  • Computers
  • Control Systems
  • Detection
  • Discrete Fourier Transforms
  • Filters
  • Geometry
  • Information Processing
  • Interferograms
  • Interferometry
  • Jet Propulsion
  • Military Research
  • Spearography
  • Test And Evaluation
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Optical Physics and Photonics.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Directed Energy