Focusing of Apertured Gaussian Beams at Long Ranges

Abstract

Using Fresnel diffraction integrals, calculations have been made of the irradiance and power distributions in the vicinity of the focus for Gaussian beams focused through annular apertures. The effect of shifting the peak of the Gaussian aperture distribution from the aperture center was investigated and was found to be a small effect in some special cases. Gaussian and sinusoidal phase distortions of the aperture field were included in the calculations. It was found that these kinds of phase distortions generally reduce the focal plane irradiances in sometimes unpredictable ways. The numerical examples chosen for illustration should be useful in interpreting future experiments to be conducted by the Air Force Weapons Laboratory at the Sandia Optical Range.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1970
Accession Number
AD0878494

Entities

People

  • Dale A. Holmes

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Cassegrain Telescopes
  • Classification
  • Diffraction
  • Distortion
  • Export Controls
  • Focal Planes
  • Government (Foreign)
  • Government Procurement
  • Governments
  • New Mexico
  • Optical Lattices
  • Phase Distortion
  • Power Distribution
  • Security
  • United States

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Spectroscopy.
  • Systems Analysis and Design