The Development of a Displacement Interferometer for Model Deflection Measurements

Abstract

A two-beam laser interferometric device capable of continuously measuring either absolute or differential displacement (both steady state and time variant) with a resolution to one-quarter of the laser wavelength is described. This device is proposed for measurement of model attitude and deflection in wind tunnel applications. Experiments are presented demonstrating its accuracy, versatility, and online readout capabilities. A conceptual multibeam device to extend the present device for simultaneous measurement of pitch, roll, twist, and deflection is also discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA034384

Entities

People

  • B. W. Bomar
  • H. T. Bentley Iii
  • R. A. Belz
  • W. H. Goethert

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Angle Of Incidence
  • Angular Motion
  • Boundary Layer
  • Detectors
  • Displacement
  • Error Analysis
  • Free Stream
  • Frequency
  • Interferometers
  • Measurement
  • Photodetectors
  • Refractive Index
  • Retroreflectors
  • Systems Engineering
  • United States
  • Waveforms

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy