8.The characteristic of transmission spectrum of icelandspar ultraviolet polariz-ing prism was measured,in the light of ultraviolet prism,the design was carried out,its func-tion performance is satisfactory。
9.Yanbian icelandspar crystal is a kind of colourless crystall with high optical quality. The crystal has pure chemical composition and its double refraction and polarization phenominon are very obvious. Its transmitted spectrum range is 0.124～ 2.5μm.
10.The calcite popular name has the big calcite and the small calcite two kinds, namely cleaves completely and incompletely two kinds, in big calcite has the transparency is very high, quality excellent is the Icelandspar.
