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Applied Optics

Applied Optics


  • Vol. 23, Iss. 12 — Jun. 15, 1984
  • pp: 1980–1985

Refractive properties of magnesium fluoride

Marilyn J. Dodge  »View Author Affiliations

Applied Optics, Vol. 23, Issue 12, pp. 1980-1985 (1984)

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The refractive indices of a commercially available specimen of single-crystal MgF2 were determined for both the ordinary and extraordinary rays at selected wavelengths from 0.2026 to 7.04 μm. Measurements were made by means of the minimum-deviation method on a precision spectrometer near 19°C. The experimentally determined index values for each polarization were fitted to a three-term Sellmeier-type dispersion equation of the form n 2 - 1 = A j λ 2 ( λ 2 - λ j 2 ), where n is the refractive index, λ is the wavelength of interest, λj is the calculated wavelength of an oscillator, and Aj is the strength of the oscillator at λj. The birefringence was computed as a function of wavelength from the calculated index values obtained for the two polarizations. The dispersion coefficients were also determined for the 0 ray and for the birefringence. The results of this study are compared with previously reported work on the refractive properties of MgF2.

© 1984 Optical Society of America

Original Manuscript: February 6, 1984
Published: June 15, 1984

Marilyn J. Dodge, "Refractive properties of magnesium fluoride," Appl. Opt. 23, 1980-1985 (1984)

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  1. This work was supported in part by the Defense Advanced Research Projects Agency, Department of Defense.
  2. Presented in part at the Oct. 1979 Meeting of the Optical Society of America [M. J. Dodge, “Refractive Properties of Magnesium Fluoride,” J. Opt. Soc. Am. 69, 1460A (1979)].
  3. Contribution of the National Bureau of Standards, not subject to copyright.
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  15. The use of trade names in this paper is for identification purposes only and does not constitute recommendation by the National Bureau of Standards.
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  25. I. I. Afanasev, L. K. Andrianova, I. Ya. Mamontov, V. M. Reiterov, “Photoelastic Properties and Residual Stresses in Magnesium Fluoride Crystals,” Sov. Phys. Solid State 17, 2006 (1976).
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