Chemical Vapor Deposition of Multispectral Domes
Final rept. 19 Mar 1973-19 Sep 1974
RAYTHEON CO WALTHAM MA RESEARCH DIV
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The program demonstrated the capability of fabricating chemical vapor deposited zinc sulfide windows and hemispherical domes. A zinc sulfide plate, 10 X 10 X 58 in., and a 9-inch hemispherical dome were fabricated and optically polished to specification. As a result of this work the optical and structural properties of zinc sulfide were significantly improved. For example, a 60 percent increase in strength was realized. It was also demonstrated that it is possible using the CVD process to deposit multiple domes per run. With further development a significant cost savings for this type of hardware should be realized. Significant progress was also made in the development of zinc sulfo-selenide solid solutions. Improvements were realized in the optical and structural properties of these deposits. At the conclusion of the program a clearer understanding of the cause of scatter in these materials and zinc sulfide had been attained that resulted in improved materials.
- Infrared Detection and Detectors