Diffractive Effects in the Determination of Damage Thresholds Using Focused Top Hat Beams

Abstract

An accurate determination of damage thresholds for focal plane elements must correctly account for diffractive effects. This technical note reviews the physics of Fraunhofer diffraction of a top hat beam. It presents a new result. accurate to second order in the subtended solid angle for the encircled energy. It describes in detail the computation of peak and average fluences in the presence of diffraction and it includes a compilation of practical formulae for workers measuring damage threshold fluences.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2003
Accession Number
ADA413846

Entities

People

  • Timothy M. Pritchett

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Bessel Functions
  • Computations
  • Department Of Defense
  • Diffraction
  • Energy Conservation
  • Equations
  • Far Field
  • Focal Planes
  • Laser Beams
  • Mathematics
  • Military Research
  • Radiation
  • Short Wavelengths
  • Standards
  • Thermal Properties

Fields of Study

  • Physics

Readers

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