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Ma'anar refractive na kayan germanium yana da girma sosai (kimanin 4.0 a cikin band 2-14μm). Lokacin amfani da gilashin taga, ana iya shafa shi bisa ga buƙatun inganta watsawar band ɗin da ta dace. Bugu da ƙari, kaddarorin watsawa na germanium suna da matukar damuwa ga canje-canjen zafin jiki (watsawa yana raguwa tare da haɓakar zafin jiki). Don haka, ana iya amfani da su kawai a ƙasa da 100 ° C. Ya kamata a yi la'akari da yawa na germanium (5.33 g / cm3) a cikin tsarin ƙira tare da tsananin buƙatun nauyi. Gilashin Germanium suna da kewayon watsawa mai faɗi (2-16μm) kuma ba su da kyau a cikin kewayon da ake iya gani, yana sa su dace musamman don aikace-aikacen Laser infrared. Germanium yana da ƙarfin Knoop na 780, kusan sau biyu taurin magnesium fluoride, wanda ya sa ya fi dacewa da aikace-aikace a cikin filin IR na canza optics.
Aikace-aikacen: Ana amfani da ruwan tabarau na Germanium a cikin ma'aunin zafi da sanyio, masu ɗaukar hoto na infrared, Laser Co2 da sauran kayan aiki. Mu abũbuwan amfãni: Jiite samar germanium ruwan tabarau, ta yin amfani da Tantancewar sa guda crystal germanium a matsayin tushe abu, ta yin amfani da sabon polishing fasahar aiwatar, da surface yana da matukar high surface daidaici, da kuma bangarorin biyu na germanium ruwan tabarau za a mai rufi da 8-14μm anti. -wani shafi , zai iya rage ra'ayi na substrate, da kuma watsawa na anti-reflection shafi a cikin aiki band ya kai fiye da 95● Material: Ge (germanium)