Refractive Index of Alkali Halides and Its Wavelength and Temperature Derivatives.

Abstract

Refractive index data for alkali halides are exhaustively surveyed, compiled, and analyzed. Recommended values at 293 K for the transparent region are generated for the materials for which experimental data are sufficiently abundant and reliable. Provisional or typical values are also provided for the wavelength regions were available data are insufficient or missing. Reasonable estimations of refractive index for the very scantily measured materials were made by incorporating the dielectric constants and wavelengths of absorption peaks into a simplified dispersion equation. Temperature derivatives of refractive index for most of the alkali halides were unavailable. However, using the existing data for the five alkali halides, novel empirical facts were discovered and dn/dT formulas were constructed for all of the alkali halides. The calculated dn/dT values agree remarkably well with the existing experimental data.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1975
Accession Number
ADA128887

Entities

People

  • H. H. Li

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption
  • Crystal Structure
  • Cubic Lattices
  • Data Analysis
  • Dielectric Permittivity
  • Optical Materials
  • Optical Phenomena
  • Optical Properties
  • Optics
  • Physical Properties
  • Potassium Chloride
  • Refraction
  • Refractive Index
  • Scattering
  • Single Crystals
  • Sodium Compounds
  • Temperature Coefficients

Readers

  • Materials Science and Engineering.
  • Spectroscopy.
  • Theoretical Analysis.