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Primary Examiner: Hoffman, James R.
Assistant Examiner:
Attorney: Fairbairn; David R.

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Title: Preparation of graded composition protective coatings

Abstract: Graded composition protective layers are prepared for water soluble optical elements. The two materials forming the graded composition protective layer are vapor deposited in the presence of a third vapor which does not react or co-deposit with the two materials. The third vapor inhibits decomposition of one of the two materials by reducing the vapor temperature of the other material.


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Inventors: Chaffin, III, John H. (Minnetonka, MN, US)

Application Number: 515140
Filing Date: 1974-10-16
Publication_date: 1977-02-22
Assignee: Honeywell Inc. (Minneapolis, MN)
Primary Class(es): 427/162 427/160, 427/164, 427/255.21
Other Classes:
US Patent Ref:
2512257Jun, 1950Pfand427/162.
2561077Jul, 1951Tilton427/248.
2668478Feb, 1954Schroder350/1.
2700002Jan, 1955Strong427/255.
3271179Sep, 1966Smith427/166.

Other Refs: 1,088,629
Oct, 1967UK.
Other References: Strong, John, Concepts of Classical Optics, W. H. Freeman, 1958, pp. 251-252.
F. Horrigan, et al., "Windows for High Power Lasers" Microwave pp. 68-75, 1969.
Sparks, "Optical Distortion by Heated Windows in High Power Laser Systems," J. Appl. Phys., vol. 42, pp. 5029-5046 (1971).
Kennedy, "Gas Scattering and Ion Plating Deposition Methods" Research/Development, Nov. 1971, pp. 40-44.