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US5788765A Crystals for ultraviolet light filters 失效
紫外光过滤器晶体

Crystals for ultraviolet light filters
摘要:
Crystals formed of a solid-solution of K.sub.2 Ni(SO.sub.4).sub.2 6H.sub.2 O provide very good materials for filtering ultraviolet light and will not deteriorate in temperatures as high as 110.degree. C. They are particularly useful in sensing devices which seek to identify the presence of ultraviolet light in the UV missile warning band.
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