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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 37, Iss. 9 — Sep. 1, 1947
  • pp: 689–693

Three-Layered Reflection-Reducing Coatings

LUTHER B. LOCKHART, JR. and PETER KING  »View Author Affiliations

JOSA, Vol. 37, Issue 9, pp. 689-693 (1947)

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An analysis of the various factors involved in several typical three-layered reflection-reducing coatings has been made from both an experimental and a theoretical standpoint. By taking into account the approximate dispersions of the materials, reasonable agreement between the experimental and calculated reflection curves has been obtained.

Interesting results were obtained on electron diffraction studies of the various coating materials. Thin films of titanium dioxide, the high index material used, were found to have crystalline patterns that varied with the coated material and that, in general, were not recognizable as titanium dioxide patterns. Thus it was considered impossible to assign any definite values to the refractive indices of such thin films without specifying the substrate.

LUTHER B. LOCKHART, JR. and PETER KING, "Three-Layered Reflection-Reducing Coatings," J. Opt. Soc. Am. 37, 689-693 (1947)

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  1. U. S. Naval Technical Mission in Europe, Technical Report No. 473–45 of September 1945.
  2. Swiss Patent 223344 of January 4, 1943, issued to Jena Glass Works, Schott and Genossen, Jena, Germany.
  3. H. A. Tanner, and L. B. Lockhart, J. Opt. Soc. Am. 36, 701 (1946).
  4. P. King and L. B. Lockhart, J. Opt. Soc. Am. 36, 513 (1946).
  5. W. Geffcken, German Patent 742,463 of January 18, 1944.
  6. This was done by J. Karle and C. Glover of the Naval Research Laboratory; studies are being continued by them.

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