AN OPTICAL SYSTEM USING MOIRE' PATTERNS TO OBTAIN QUANTITATIVE DATA IN A BOUNDARY LAYER.

Abstract

The moire' technique is extended to the measurement of refractive index gradients in air. Moire' bands produced by printers' screens separated by an air space are deviated by an index of refraction gradient. The deviation is shown to be directly proportional to the temperature and density gradients. Temperature gradients are measured along the vertical surface of a heated flat plate and compared with theoretical values. Measured values generally agree with theoretical values within 5%. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1965
Accession Number
AD0620671

Entities

People

  • James Maner Tonge

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Isotherms
  • Layers
  • Refraction
  • Refractive Index
  • Temperature Gradients

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Space