Chemical Vapor Deposition of Multispectral Domes

The program demonstrated the capability of fabricating chemical vapor deposited zinc sulfide windows and hemispherical domes. A zinc sulfide plate, 10 X 10 X 5/8 in., and a 9-inch hemispherical dome were fabricated and optically polished to specification. As a result of this work the optical and str...

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Bibliographic Details
Main Authors: DiBenedetto, B A, Pappis, J
Format: Report
Language:English
Subjects:
CHEMICAL VAPOR DEPOSITION
DOMES(STRUCTURAL FORMS)
ELECTROMAGNETIC SCATTERING
FORWARD LOOKING INFRARED SYSTEMS
Infrared Detection and Detectors
INFRARED WINDOWS
MICROSTRUCTURE
OPTICAL COATINGS
Optics
VAPOR DEPOSITION
VISIBLE SPECTRA
WINDOWS
ZINC SELENIDES
ZINC SULFIDES
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Summary:The program demonstrated the capability of fabricating chemical vapor deposited zinc sulfide windows and hemispherical domes. A zinc sulfide plate, 10 X 10 X 5/8 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. GIDEP-E044-1681, GIDEP-502.31.00.00-G7-01