Thallium Iodide Coatings for Potassium Chloride for 9.27 Micrometers.

Abstract

Five three-layer antireflection coatings for potassium chloride incorporating thallium iodide were investigated. The center layers considered were NaF, ThF4, and KCl. The coatings were tuned for 9.27 micrometers. The window absorption was typically 0.5%. This is a factor of five over the absorption of state of the art coatings at 10.6 micrometers. This increase in absorption is extremely significant. The power handling capability of a window scales with absorption and these absorption measurements indicate that halid windows for operation at 9.27 micrometers must be significantly derated. Two approaches for systematically investigating possible antireflection coating designs for the case of three layers are presented.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1978
Accession Number
ADA058789

Entities

People

  • Melvin C. Ohmer

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Antireflection Coatings
  • Carbon Dioxide Lasers
  • Crystal Structure
  • Infrared Lasers
  • Lasers
  • Latent Heat
  • Materials
  • Materials Laboratories
  • Measurement
  • Optical Materials
  • Optical Properties
  • Phase Diagrams
  • Phase Transformations
  • Potassium Chloride
  • Refraction
  • Refractive Index

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Neural Network Machine Learning.
  • Optical Physics and Photonics.