Polycrystalline zinc sulfide and zinc selenide articles having improved optical quality
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United States of America Patent
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Jul 31, 1990
Issued Date -
N/A
app pub date -
Jun 14, 1984
filing date -
Mar 16, 1983
priority date (Note) -
Expired
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Abstract
Articles of polycrystalline zinc sulfide and zinc selenide achieve substantially improved optical quality by a treatment of heat and isostatic pressure by means of an inert working fluid. The treated specimens are transparent and have substantial transmission in the infrared and visible range of the spectrum. Additional improvement in the transmission characteristics is achieved by wrapping the specimens in a foil of an inert material prior to treatment.
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