Abstract

The development of surface finishing and coating technology at 10.6 μm for polycrystalline ZnSe laser windows is presented. Optical evaluation of the coated windows shows that the 10.6-μm absorption and reflection can be held to less than 0.1% per surface. Surface finishing procedures, theoretical coating designs, and recent experimental results for antireflection coatings for ZnSe are presented.

© 1974 Optical Society of America

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References

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  1. J. T. Cox, G. Hass, “Antireflection Coatings for Optical and Infrared Optical Materials,” in Physics of Thin Films, G. Hass, Ed. (Academic Press, New York, 1964), Vol. 2, p. 239.
  2. H. A. MacLeod, Thin Film Optical Filters (American Elsevier, New York, 1969).
  3. W. L. Wolfe, Handbook of Military Infrared Technology (Office of Naval Research, Department of the Navy, Washington, D.C., 1965).
  4. M. Braunstein, A. I. Braunstein, J. E. Rudisill, Proc. of Conference on High Power Infrared Laser Window Materials (Air Force Systems Command, Bedford, Mass., 1972), p. 777.
  5. O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955).
  6. A. I. Braunstein, M. Braunstein, “Theoretical Treatment of Electric Field and Absorption Distributions in Windows and Window Coatings,” to be published.
  7. Manufactured by Balzers High Vacuum Corporation, Code 490-112.
  8. D. L. Perry, Appl. Opt. 4, 987 (1965).
    [CrossRef]
  9. K. H. Behrndt, D. W. Doughty, J. Vac. Sci. Technol. 3, 264 (1966).
    [CrossRef]

1966 (1)

K. H. Behrndt, D. W. Doughty, J. Vac. Sci. Technol. 3, 264 (1966).
[CrossRef]

1965 (1)

Behrndt, K. H.

K. H. Behrndt, D. W. Doughty, J. Vac. Sci. Technol. 3, 264 (1966).
[CrossRef]

Braunstein, A. I.

A. I. Braunstein, M. Braunstein, “Theoretical Treatment of Electric Field and Absorption Distributions in Windows and Window Coatings,” to be published.

M. Braunstein, A. I. Braunstein, J. E. Rudisill, Proc. of Conference on High Power Infrared Laser Window Materials (Air Force Systems Command, Bedford, Mass., 1972), p. 777.

Braunstein, M.

M. Braunstein, A. I. Braunstein, J. E. Rudisill, Proc. of Conference on High Power Infrared Laser Window Materials (Air Force Systems Command, Bedford, Mass., 1972), p. 777.

A. I. Braunstein, M. Braunstein, “Theoretical Treatment of Electric Field and Absorption Distributions in Windows and Window Coatings,” to be published.

Cox, J. T.

J. T. Cox, G. Hass, “Antireflection Coatings for Optical and Infrared Optical Materials,” in Physics of Thin Films, G. Hass, Ed. (Academic Press, New York, 1964), Vol. 2, p. 239.

Doughty, D. W.

K. H. Behrndt, D. W. Doughty, J. Vac. Sci. Technol. 3, 264 (1966).
[CrossRef]

Hass, G.

J. T. Cox, G. Hass, “Antireflection Coatings for Optical and Infrared Optical Materials,” in Physics of Thin Films, G. Hass, Ed. (Academic Press, New York, 1964), Vol. 2, p. 239.

Heavens, O. S.

O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955).

MacLeod, H. A.

H. A. MacLeod, Thin Film Optical Filters (American Elsevier, New York, 1969).

Perry, D. L.

Rudisill, J. E.

M. Braunstein, A. I. Braunstein, J. E. Rudisill, Proc. of Conference on High Power Infrared Laser Window Materials (Air Force Systems Command, Bedford, Mass., 1972), p. 777.

Wolfe, W. L.

W. L. Wolfe, Handbook of Military Infrared Technology (Office of Naval Research, Department of the Navy, Washington, D.C., 1965).

Appl. Opt. (1)

J. Vac. Sci. Technol. (1)

K. H. Behrndt, D. W. Doughty, J. Vac. Sci. Technol. 3, 264 (1966).
[CrossRef]

Other (7)

J. T. Cox, G. Hass, “Antireflection Coatings for Optical and Infrared Optical Materials,” in Physics of Thin Films, G. Hass, Ed. (Academic Press, New York, 1964), Vol. 2, p. 239.

H. A. MacLeod, Thin Film Optical Filters (American Elsevier, New York, 1969).

W. L. Wolfe, Handbook of Military Infrared Technology (Office of Naval Research, Department of the Navy, Washington, D.C., 1965).

M. Braunstein, A. I. Braunstein, J. E. Rudisill, Proc. of Conference on High Power Infrared Laser Window Materials (Air Force Systems Command, Bedford, Mass., 1972), p. 777.

O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955).

A. I. Braunstein, M. Braunstein, “Theoretical Treatment of Electric Field and Absorption Distributions in Windows and Window Coatings,” to be published.

Manufactured by Balzers High Vacuum Corporation, Code 490-112.

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Figures (5)

Fig. 1
Fig. 1

Refractive indices for AR coating on ZnSe.

Fig. 2
Fig. 2

10.6-μm reflectance and scattering apparatus.

Fig. 3
Fig. 3

Spectral response for BaF2/ZnS-coated ZnSe.

Fig. 4
Fig. 4

Spectral response for ThF4/ZnSe-coated ZnSe.

Fig. 5
Fig. 5

Spectral response for ThF4/ZnS-coated ZnSe.

Tables (5)

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Table I Theoretical Designs for Antireflection Coatings on ZnSe

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Table II Polishing and Finishing Results on ZnSe Window Blanks

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Table III Antireflection Coating Results on ZnSe Window

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Table IV Environmental Results on Coated ZnSe Windows

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Table V Summary of ThF4/ZnSe Antireflection System/Window Results

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