Slotted Apertures for Multiplexing Grating Frequencies and Sharpening Fringe Patterns in Moire Photography.

Abstract

Slotted aperture filter masks can be used to 'tune' a photographic system to an integral multiple of a fundamental grating frequency. Such a procedure can be used in moire photography for multiplying sensitivity and for obtaining improved rendering of fringe patterns. Depth of field is increased, and a camera lens of poorer quality than is normally required for high resolution photography of moire gratings is adequate. Also gained is flexibility in optical data processing of moire photographs and in the use of two-dimensional grid and dot specimen arrays. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA041256

Entities

People

  • Gary Cloud

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Air Force
  • Air Force Facilities
  • Cameras
  • Data Processing
  • Filters
  • Frequency
  • Frequency Response
  • Governments
  • High Resolution
  • Materials
  • Materials Laboratories
  • Mechanics
  • Optical Processing
  • Photographs
  • Photography
  • Plastic Deformation

Fields of Study

  • Physics

Readers

  • Materials Science (Mechanical Engineering).
  • Optical Physics and Photonics.
  • Phased Array Antenna Design.