Abstract

The dispersion and aging effects of thin films of MgF2 and ZnS were investigated in the spectral range of 4000 A to 7500 A. The method of evaporating ZnS is reported. The index of refraction was calculated from spectrophotometric reflectance measurements at extremes of reflectance.

© 1955 Optical Society of America

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References

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  1. J. A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, Inc., New York, 1941), first edition, p. 513.
  2. R. L. Mooney, J. Opt. Soc. Am. 35, 574 (1945).
    [Crossref]
  3. George Hass and Calvin D. Salzberg, J. Opt. Soc. Am. 44, 183 (1954).
  4. Joseph L. Rood, J. Opt. Soc. Am. 39, 854 (1949).
    [Crossref]
  5. Handbook of Chemistry and Physics (Chemical Rubber Publishing Company, Cleveland, 1947).
  6. J. R. DeVore, J. Opt. Soc. Am. 41, 416 (1951).
    [Crossref]

1954 (1)

George Hass and Calvin D. Salzberg, J. Opt. Soc. Am. 44, 183 (1954).

1951 (1)

1949 (1)

1945 (1)

DeVore, J. R.

Hass, George

George Hass and Calvin D. Salzberg, J. Opt. Soc. Am. 44, 183 (1954).

Mooney, R. L.

Rood, Joseph L.

Salzberg, Calvin D.

George Hass and Calvin D. Salzberg, J. Opt. Soc. Am. 44, 183 (1954).

Stratton, J. A.

J. A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, Inc., New York, 1941), first edition, p. 513.

J. Opt. Soc. Am. (4)

Other (2)

J. A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, Inc., New York, 1941), first edition, p. 513.

Handbook of Chemistry and Physics (Chemical Rubber Publishing Company, Cleveland, 1947).

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Figures (3)

Fig. 1
Fig. 1

Aging effects of typical MgF2 film.

Fig. 2
Fig. 2

Index of refraction of MgF2 showing change of index with age. Bulk indexes of the crystalline solid are indicated by crosses (x’s).

Fig. 3
Fig. 3

Index of refraction of ZnS.

Equations (2)

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R 0 = ( n f - 1 n f + 1 ) 2 + ( n f - n g n f + n g ) 2 + 2 ( n f - 1 n f + 1 ) ( n f - n g n f + n g ) cos ( 4 π n f λ d ) 1 + ( n f - 1 n f + 1 ) 2 ( n f - n g n f + n g ) 2 + 2 ( n f - 1 n f + 1 ) ( n f - n g n f + n g ) cos ( 4 π n f λ d ) .
n f = [ n g ( 1 + R 0 1 2 ) / ( 1 - R 0 1 2 ) ] 1 2 .