INVESTIGATION OF HOLOGRAPHIC TESTING TECHNIQUES

Abstract

The report includes studies of interferometric detection of stress corrosion cracking, testing of honeycomb sandwich structures, techniques developed for pulsed-laser contouring and interferometry, laser speckle reduction in interferometry, modulated reference-wave holography, and flaw detection. Holographic interferometry has been used to detect initiation of stress corrosion, monitor the progressing of delayed cracking, and detect bond defects in an aircraft trim tab of honeycomb structure. The several theoretical and experimental investigations conducted include the development of multiple- wavelength holographic interferometry, the study of techniques for improving interferometry of three-dimensional transparent objects, the application of modulated reference-wave holography to vibrating diffusely reflecting objects, and the application of hologram interferometry to detection of flaws in cylindrical steel objects.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0705228

Entities

People

  • Charles M. Vest
  • Emmett N. Leith

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Corrosion
  • Honeycomb Structures
  • Lasers
  • Light Sources
  • Materials
  • Mechanics
  • Nondestructive Testing
  • Optical Equipment
  • Optics
  • Pulsed Lasers
  • Refractive Index
  • Stress Corrosion Cracking
  • Stress Cracking
  • Three Dimensional
  • Trim Tabs
  • Waveplates

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy