Abstract

Properties of thin evaporated films of MgF2 and of CaSiO3 on glass were studied. Thicknesses of the films were determined from measurements of reflected intensity as a function of wave-length, and indices of refraction computed. Density measurements were carried out for MgF2 films. All these properties were found to be different from those of the corresponding bulk materials, and furthermore, the properties of the films change with time. Results are given for indices of refraction, densities, and aging effects.

© 1949 Optical Society of America

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Corrections

Joseph L. Rood, "Errata*: Some Properties of Thin Evaporated Films on Glass," J. Opt. Soc. Am. 40, 883_1-883 (1950)
https://www.osapublishing.org/josa/abstract.cfm?uri=josa-40-12-883_1

References

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  1. See, for example, Doris L. Cabellero, J. Opt. Soc. Am. 37, 176 (1947);P. King and L. B. Lockhart, J. Opt. Soc. Am. 36, 513 (1946);R. L. Mooney, J. Opt. Soc. Am. 35, 574 (1945);Antonin Vašiček, J. Opt. Soc. Am. 37, 623–634 (1947).
    [Crossref]
  2. Handbook of Chemistry and Physics (Chemical Rubber Publishing Company, Cleveland, 1947).
  3. J. Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry (Longmans, Green and Company, London, 1925), VI, pp. 347ff.
  4. See, for example, R. B. Muchmore, J. Opt. Soc. Am. 38, 20 (1948).
    [Crossref]
  5. A. E. Conrady, Proc. Roy. Soc. London 101, 211 (1922), described procedures for weighing masses as large as 50 grams with probable errors of 0.001 mg or less.
    [Crossref]
  6. See reference 3, IV, pp. 296f.
  7. This idea (applied to a different situation) is discussed by R. G. Picard and O. S. Duffendack, J. App. Phys. 14, 291 (1943).
    [Crossref]

1948 (1)

1947 (1)

1943 (1)

This idea (applied to a different situation) is discussed by R. G. Picard and O. S. Duffendack, J. App. Phys. 14, 291 (1943).
[Crossref]

1922 (1)

A. E. Conrady, Proc. Roy. Soc. London 101, 211 (1922), described procedures for weighing masses as large as 50 grams with probable errors of 0.001 mg or less.
[Crossref]

Cabellero, Doris L.

Conrady, A. E.

A. E. Conrady, Proc. Roy. Soc. London 101, 211 (1922), described procedures for weighing masses as large as 50 grams with probable errors of 0.001 mg or less.
[Crossref]

Duffendack, O. S.

This idea (applied to a different situation) is discussed by R. G. Picard and O. S. Duffendack, J. App. Phys. 14, 291 (1943).
[Crossref]

Mellor, J.

J. Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry (Longmans, Green and Company, London, 1925), VI, pp. 347ff.

Muchmore, R. B.

Picard, R. G.

This idea (applied to a different situation) is discussed by R. G. Picard and O. S. Duffendack, J. App. Phys. 14, 291 (1943).
[Crossref]

J. App. Phys. (1)

This idea (applied to a different situation) is discussed by R. G. Picard and O. S. Duffendack, J. App. Phys. 14, 291 (1943).
[Crossref]

J. Opt. Soc. Am. (2)

Proc. Roy. Soc. London (1)

A. E. Conrady, Proc. Roy. Soc. London 101, 211 (1922), described procedures for weighing masses as large as 50 grams with probable errors of 0.001 mg or less.
[Crossref]

Other (3)

See reference 3, IV, pp. 296f.

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

J. Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry (Longmans, Green and Company, London, 1925), VI, pp. 347ff.

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Figures (6)

F. 1
F. 1

Experimental values of reflectivity as a function of wave-length for a typical MgF2 film, M14.

F. 2
F. 2

Experimental values of reflectivity as a function of wave-length for a typical CaSiO3 film, C9.

F. 3
F. 3

Indices of refraction of CaSiO3 films having quarter-wave maxima of reflectivity in the region 4200A to 6200A. (A plot of columns 3 and 5 of Table II.)

F. 4
F. 4

Aging effects on M1, a quarter-wave MgF2 film. The curves represent reflectivity measurements carried out 1, 3, and 80 days after preparation of the film.

F. 5
F. 5

Aging effects on C9, a quarter-wave CaSiO3 film. The curves represent reflectivity measurements carried out 1 and 15 days after preparation of the film.

F. 6
F. 6

Aging effects on C11, a half-wave CaSiO3 film. The curves represent reflectivity measurements carried out immediately after preparation of the film, and 1 and 2 days later.

Tables (4)

Tables Icon

Table I Indices of refraction and thicknesses of MgF2 films having quarter-wave minima of reflectivity in region 4200A to 6200A.

Tables Icon

Table II Indices of refraction of CaSiO3 films having quarter-wave maxima of reflectivity in region 4200A to 6200A.

Tables Icon

Table III Reflectivities as a function of wave-length for two-film coatings on glass. Film nearest glass: CaSiO3, film on top: MgF2.

Tables Icon

Table IV Density of MgF2 films.

Equations (10)

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R = ( n 0 + n 1 ) 2 ( n 1 1 ) 2 + ( n 1 + 1 ) 2 ( n 0 n 1 ) 2 + 2 ( n 1 2 1 ) ( n 0 2 n 1 2 ) cos x ( n 0 + n 1 ) 2 ( n 1 + 1 ) 2 + ( n 1 1 ) 2 ( n 0 n 1 ) 2 + 2 ( n 1 2 1 ) ( n 0 2 n 1 2 ) cos x ,
R = [ ( n 0 1 ) / ( n 0 + 1 ) ] 2 .
R = ( n 1 2 n 0 ) 2 / ( n 1 2 + n 0 ) 2 .
n 1 = [ n 0 ( 1 + ( R ) 1 2 ) / ( 1 ( R ) 1 2 ) ] 1 2 .
R = [ n 1 n 2 ( 1 n 0 ) ( n 1 2 n 0 n 2 2 ) tan x 1 2 tan x 2 2 ] 2 [ n 1 n 2 ( 1 + n 0 ) ( n 1 2 + n 0 n 2 2 ) tan x 1 2 tan x 2 2 ] 2 + [ n 2 ( n 0 n 1 2 ) tan x 1 2 + n 1 ( n 0 n 2 2 ) tan x 2 2 ] 2 [ n 2 ( n 0 + n 1 2 ) tan x 1 2 + n 1 ( n 0 + n 2 2 ) tan x 2 2 ] 2 .
R = ( n 2 2 n 0 n 1 2 ) 2 / ( n 2 2 n 0 + n 1 2 ) 2 ;
R = ( n 0 1 ) 2 / ( n 0 + 1 ) 2 .
n 2 2 n 0 n 1 2 = 0 .
n 1 = [ n 0 ( 1 + ( R ) 1 2 ) / ( 1 ( R ) 1 2 ) ] 1 2 .
n 2 2 n 0 n 1 2 = 0 ,