TIME-FREQUENCY SIGNATURES THROUGH OPTICAL DIFFRACTION SCANNING

Abstract

An optical scanning method has been developed to present frequency content as it occurs and changes throughout a variable-density seismogram. Energy distributions are shown in both frequency and time. A two-dimensional pattern is presented which can be visually evaluated, and is suitable for numerical measurement. The report describes and discusses the method, and gives illustrative examples. It also describes a similar scanning method by which seismic wave dispersions can be revealed and measured.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1963
Accession Number
AD0419191

Entities

People

  • Philip L. Jackson

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Agreements
  • Air Force
  • Contracts
  • Diffraction
  • Filtration
  • Focal Planes
  • Frequency
  • Frequency Bands
  • Geophysics
  • Government Procurement
  • Light Sources
  • Machines
  • Measurement
  • Microphotometers
  • Optical Scanning
  • Standing Waves
  • Wave Propagation

Readers

  • Computational Fluid Dynamics (CFD)
  • Image Processing and Computer Vision.
  • Seismology